diff --git a/.babelrc.js b/.babelrc.js
new file mode 100644
index 0000000..5a5ae8c
--- /dev/null
+++ b/.babelrc.js
@@ -0,0 +1,18 @@
+// var env = process.env.BABEL_ENV || process.env.NODE_ENV; // Maybe later : for minify stuff
+var presets = [
+    "@babel/env",
+    "@babel/preset-typescript"
+];
+var plugins = [
+    "@babel/plugin-proposal-class-properties",
+    "@babel/proposal-object-rest-spread"
+];
+var ignore = [];
+var comments = false;
+
+module.exports = {
+    presets: presets,
+    plugins: plugins,
+    ignore: ignore,
+    comments: comments
+};
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index b438dcd..0a91386 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,11 +16,14 @@ os:
   - linux
 before_install:
   - npm i -g npm@latest
+  - npm install -g codecov
   - npm i -g travis-deploy-once
 before_script:
   - npm prune
+  - echo "Check if TypeScript files have valid syntax/types"
+  - npm run type-check
 after_success:
-  - npm run coverage
+  - codecov
   - travis-deploy-once && npx -p node@8 npm run semantic-release
 branches:
   except:
diff --git a/__tests__/__helpers__/preprocessor.js b/__tests__/__helpers__/preprocessor.js
deleted file mode 100644
index cedb887..0000000
--- a/__tests__/__helpers__/preprocessor.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2004-present Facebook. All Rights Reserved.
-
-const tsc = require('typescript');
-const tsConfig = require('../../tsconfig.json');
-
-module.exports = {
-    process(src, path) {
-        if (path.endsWith('.ts') || path.endsWith('.tsx')) {
-            return tsc.transpile(src, tsConfig.compilerOptions, path, []);
-        }
-        return src;
-    },
-};
\ No newline at end of file
diff --git a/jest.config.js b/jest.config.js
index c73f909..b444a82 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -7,7 +7,7 @@ module.exports = {
         "js"
     ],
     "transform": {
-        "^.+\\.(ts|tsx)$": "<rootDir>/__tests__/__helpers__/preprocessor.js"
+        "^.+\\.tsx?$": "ts-jest"
     },
     "testMatch": [
         "<rootDir>/__tests__/**/*.(ts|tsx|js)"
diff --git a/package-lock.json b/package-lock.json
index 7ea88e1..0343592 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,24 +4,785 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/cli": {
+      "version": "7.0.0-beta.40",
+      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.0.0-beta.40.tgz",
+      "integrity": "sha512-7f2pWUlklOYn5USkVPlDw1yX71WsgP8EG7CTn17j4ydtGnYtD+nptTMM4J3EaRgILOgfesVkSOV+lIOnUVOAlg==",
+      "dev": true,
+      "requires": {
+        "chokidar": "1.7.0",
+        "commander": "2.14.1",
+        "convert-source-map": "1.5.1",
+        "fs-readdir-recursive": "1.1.0",
+        "glob": "7.1.2",
+        "lodash": "4.17.5",
+        "output-file-sync": "2.0.1",
+        "slash": "1.0.0",
+        "source-map": "0.5.7"
+      }
+    },
     "@babel/code-frame": {
       "version": "7.0.0-beta.40",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0-beta.40.tgz",
-      "integrity": "sha512-eVXQSbu/RimU6OKcK2/gDJVTFcxXJI4sHbIqw2mhwMZeQ2as/8AhS9DGkEDoHMBBNJZ5B0US63lF56x+KDcxiA==",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0-beta.40.tgz",
+      "integrity": "sha512-eVXQSbu/RimU6OKcK2/gDJVTFcxXJI4sHbIqw2mhwMZeQ2as/8AhS9DGkEDoHMBBNJZ5B0US63lF56x+KDcxiA==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "7.0.0-beta.40"
+      }
+    },
+    "@babel/core": {
+      "version": "7.0.0-beta.40",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.0.0-beta.40.tgz",
+      "integrity": "sha512-jJMjn/EMg89xDGv7uq4BoFg+fHEchSeqNc9YUMnGuAi/FWKBkSsDbhh2y5euw4qaGOFD2jw1le0rvCu5gPUc6Q==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "7.0.0-beta.40",
+        "@babel/generator": "7.0.0-beta.40",
+        "@babel/helpers": "7.0.0-beta.40",
+        "@babel/template": "7.0.0-beta.40",
+        "@babel/traverse": "7.0.0-beta.40",
+        "@babel/types": "7.0.0-beta.40",
+        "babylon": "7.0.0-beta.40",
+        "convert-source-map": "1.5.1",
+        "debug": "3.1.0",
+        "json5": "0.5.1",
+        "lodash": "4.17.5",
+        "micromatch": "2.3.11",
+        "resolve": "1.5.0",
+        "source-map": "0.5.7"
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+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
+          "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
+          "dev": true
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+        "babylon": {
+          "version": "7.0.0-beta.40",
+          "resolved": "https://registry.npmjs.org/babylon/-/babylon-7.0.0-beta.40.tgz",
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+          "dev": true
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+          "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
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+            "expand-range": "1.8.2",
+            "preserve": "0.2.0",
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+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
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       "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz",
-      "integrity": "sha1-PMWfAAJRlLarLjjbrmaJJWtmBXI=",
-      "dev": true
+      "integrity": "sha1-PMWfAAJRlLarLjjbrmaJJWtmBXI="
     },
     "is-text-path": {
       "version": "1.0.1",
@@ -5240,8 +6137,7 @@
     "object-keys": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.0.11.tgz",
-      "integrity": "sha1-xUYBd4rVYPEULODgG8yotW0TQm0=",
-      "dev": true
+      "integrity": "sha1-xUYBd4rVYPEULODgG8yotW0TQm0="
     },
     "object-visit": {
       "version": "1.0.1",
@@ -5252,6 +6148,17 @@
         "isobject": "3.0.1"
       }
     },
+    "object.entries": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/object.entries/-/object.entries-1.0.4.tgz",
+      "integrity": "sha1-G/mk3SKI9bM/Opk9JXZh8F0WGl8=",
+      "requires": {
+        "define-properties": "1.1.2",
+        "es-abstract": "1.10.0",
+        "function-bind": "1.1.1",
+        "has": "1.0.1"
+      }
+    },
     "object.getownpropertydescriptors": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/object.getownpropertydescriptors/-/object.getownpropertydescriptors-2.0.3.tgz",
@@ -5362,6 +6269,17 @@
       "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=",
       "dev": true
     },
+    "output-file-sync": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/output-file-sync/-/output-file-sync-2.0.1.tgz",
+      "integrity": "sha512-mDho4qm7WgIXIGf4eYU1RHN2UU5tPfVYVSRwDJw0uTmj35DQUt/eNp19N7v6T3SrR0ESTEf2up2CGO73qI35zQ==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "4.1.11",
+        "is-plain-obj": "1.1.0",
+        "mkdirp": "0.5.1"
+      }
+    },
     "p-finally": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
@@ -5762,6 +6680,18 @@
         "util-deprecate": "1.0.2"
       }
     },
+    "readdirp": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-2.1.0.tgz",
+      "integrity": "sha1-TtCtBg3zBzMAxIRANz9y0cxkLXg=",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "4.1.11",
+        "minimatch": "3.0.4",
+        "readable-stream": "2.3.4",
+        "set-immediate-shim": "1.0.1"
+      }
+    },
     "realpath-native": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/realpath-native/-/realpath-native-1.0.0.tgz",
@@ -5809,12 +6739,36 @@
         }
       }
     },
+    "regenerate": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/regenerate/-/regenerate-1.3.3.tgz",
+      "integrity": "sha512-jVpo1GadrDAK59t/0jRx5VxYWQEDkkEKi6+HjE3joFVLfDOh9Xrdh0dF1eSq+BI/SwvTQ44gSscJ8N5zYL61sg==",
+      "dev": true
+    },
+    "regenerate-unicode-properties": {
+      "version": "5.1.3",
+      "resolved": "https://registry.npmjs.org/regenerate-unicode-properties/-/regenerate-unicode-properties-5.1.3.tgz",
+      "integrity": "sha512-Yjy6t7jFQczDhYE+WVm7pg6gWYE258q4sUkk9qDErwXJIqx7jU9jGrMFHutJK/SRfcg7MEkXjGaYiVlOZyev/A==",
+      "dev": true,
+      "requires": {
+        "regenerate": "1.3.3"
+      }
+    },
     "regenerator-runtime": {
       "version": "0.11.1",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
       "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
       "dev": true
     },
+    "regenerator-transform": {
+      "version": "0.12.3",
+      "resolved": "https://registry.npmjs.org/regenerator-transform/-/regenerator-transform-0.12.3.tgz",
+      "integrity": "sha512-y2uxO/6u+tVmtEDIKo+tLCtI0GcbQr0OreosKgCd7HP4VypGjtTrw79DezuwT+W5QX0YWuvpeBOgumrepwM1kA==",
+      "dev": true,
+      "requires": {
+        "private": "0.1.8"
+      }
+    },
     "regex-cache": {
       "version": "0.4.4",
       "resolved": "https://registry.npmjs.org/regex-cache/-/regex-cache-0.4.4.tgz",
@@ -5833,6 +6787,20 @@
         "extend-shallow": "2.0.1"
       }
     },
+    "regexpu-core": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.1.3.tgz",
+      "integrity": "sha512-mB+njEzO7oezA57IbQxxd6fVPOeWKDmnGvJ485CwmfNchjHe5jWwqKepapmzUEj41yxIAqOg+C4LbXuJlkiO8A==",
+      "dev": true,
+      "requires": {
+        "regenerate": "1.3.3",
+        "regenerate-unicode-properties": "5.1.3",
+        "regjsgen": "0.3.0",
+        "regjsparser": "0.2.1",
+        "unicode-match-property-ecmascript": "1.0.3",
+        "unicode-match-property-value-ecmascript": "1.0.1"
+      }
+    },
     "registry-auth-token": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/registry-auth-token/-/registry-auth-token-3.3.2.tgz",
@@ -5843,6 +6811,29 @@
         "safe-buffer": "5.1.1"
       }
     },
+    "regjsgen": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/regjsgen/-/regjsgen-0.3.0.tgz",
+      "integrity": "sha1-DuSj6SdkMM2iXx54nqbBW4ewy0M=",
+      "dev": true
+    },
+    "regjsparser": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/regjsparser/-/regjsparser-0.2.1.tgz",
+      "integrity": "sha1-w3h1U/rwTndcMCEC7zRtmVAA7Bw=",
+      "dev": true,
+      "requires": {
+        "jsesc": "0.5.0"
+      },
+      "dependencies": {
+        "jsesc": {
+          "version": "0.5.0",
+          "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+          "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+          "dev": true
+        }
+      }
+    },
     "remove-trailing-separator": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz",
@@ -5938,6 +6929,15 @@
       "integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=",
       "dev": true
     },
+    "resolve": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.5.0.tgz",
+      "integrity": "sha512-hgoSGrc3pjzAPHNBg+KnFcK2HwlHTs/YrAGUr6qgTVUZmXv1UEXXl0bZNBKMA9fud6lRYFdPGz0xXxycPzmmiw==",
+      "dev": true,
+      "requires": {
+        "path-parse": "1.0.5"
+      }
+    },
     "resolve-cwd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/resolve-cwd/-/resolve-cwd-2.0.0.tgz",
@@ -6124,6 +7124,12 @@
         "to-object-path": "0.3.0"
       }
     },
+    "set-immediate-shim": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz",
+      "integrity": "sha1-SysbJ+uAip+NzEgaWOXlb1mfP2E=",
+      "dev": true
+    },
     "set-value": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.0.tgz",
@@ -6151,6 +7157,18 @@
       "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
       "dev": true
     },
+    "shell-quote": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.6.1.tgz",
+      "integrity": "sha1-9HgZSczkAmlxJ0MOo7PFR29IF2c=",
+      "dev": true,
+      "requires": {
+        "array-filter": "0.0.1",
+        "array-map": "0.0.0",
+        "array-reduce": "0.0.0",
+        "jsonify": "0.0.0"
+      }
+    },
     "shellwords": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz",
@@ -6635,6 +7653,23 @@
       "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
       "dev": true
     },
+    "subarg": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/subarg/-/subarg-1.0.0.tgz",
+      "integrity": "sha1-9izxdYHplrSPyWVpn1TAauJouNI=",
+      "dev": true,
+      "requires": {
+        "minimist": "1.2.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
+      }
+    },
     "supports-color": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.2.0.tgz",
@@ -6946,6 +7981,37 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
       "dev": true
     },
+    "ts-jest": {
+      "version": "22.0.4",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-22.0.4.tgz",
+      "integrity": "sha512-cQlgWYCakArbHW5B5RgZvmBomepOuIBLCR972AdWuaK6VmLxbmCh8OCaGGcBChf7dv/8YNACYvC6jeebQDKgyA==",
+      "dev": true,
+      "requires": {
+        "babel-core": "6.26.0",
+        "babel-plugin-istanbul": "4.1.5",
+        "babel-plugin-transform-es2015-modules-commonjs": "6.26.0",
+        "babel-preset-jest": "22.2.0",
+        "cpx": "1.5.0",
+        "fs-extra": "4.0.3",
+        "jest-config": "22.3.0",
+        "pkg-dir": "2.0.0",
+        "source-map-support": "0.5.3",
+        "yargs": "11.0.0"
+      },
+      "dependencies": {
+        "fs-extra": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-4.0.3.tgz",
+          "integrity": "sha512-q6rbdDd1o2mAnQreO7YADIxf/Whx4AHBiRf6d+/cVT8h44ss+lHgxf1FemcqDnQt9X3ct4McHr+JMGlYSsK7Cg==",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "4.1.11",
+            "jsonfile": "4.0.0",
+            "universalify": "0.1.1"
+          }
+        }
+      }
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -7024,6 +8090,34 @@
       "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==",
       "dev": true
     },
+    "unicode-canonical-property-names-ecmascript": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.3.tgz",
+      "integrity": "sha512-iG/2t0F2LAU8aZYPkX5gi7ebukHnr3sWFESpb+zPQeeaQwOkfoO6ZW17YX7MdRPNG9pCy+tjzGill+Ah0Em0HA==",
+      "dev": true
+    },
+    "unicode-match-property-ecmascript": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.3.tgz",
+      "integrity": "sha512-nFcaBFcr08UQNF15ZgI5ISh3yUnQm7SJRRxwYrL5VYX46pS+6Q7TCTv4zbK+j6/l7rQt0mMiTL2zpmeygny6rA==",
+      "dev": true,
+      "requires": {
+        "unicode-canonical-property-names-ecmascript": "1.0.3",
+        "unicode-property-aliases-ecmascript": "1.0.3"
+      }
+    },
+    "unicode-match-property-value-ecmascript": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.0.1.tgz",
+      "integrity": "sha512-lM8B0FDZQh9yYGgiabRQcyWicB27VLOolSBRIxsO7FeQPtg+79Oe7sC8Mzr8BObDs+G9CeYmC/shHo6OggNEog==",
+      "dev": true
+    },
+    "unicode-property-aliases-ecmascript": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.3.tgz",
+      "integrity": "sha512-TdDmDOTxEf2ad1g3ZBpM6cqKIb2nJpVlz1Q++casDryKz18tpeMBhSng9hjC1CTQCkOV9Rw2knlSB6iRo7ad1w==",
+      "dev": true
+    },
     "union-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
diff --git a/package.json b/package.json
index e881705..31ffa03 100644
--- a/package.json
+++ b/package.json
@@ -11,9 +11,10 @@
     "test": "jest",
     "semantic-release": "semantic-release -e ./config/release.config.js",
     "prepare": "npm run compile",
-    "compile": "tsc",
     "clean": "jest --clearCache",
-    "coverage": "cat ./coverage/lcov.info | coveralls"
+    "coverage": "cat ./coverage/lcov.info | coveralls",
+    "compile": "babel src --out-dir lib --extensions \".ts\" --source-maps both",
+    "type-check": "tsc"
   },
   "engines": {
     "node": ">=6",
@@ -44,10 +45,17 @@
     "bluebird": "^3.5.1",
     "filehound": "^1.16.2",
     "lodash": "^4.17.5",
+    "object.entries": "^1.0.4",
     "parse-torrent-title": "^1.1.0",
     "video-extensions": "^1.1.0"
   },
   "devDependencies": {
+    "@babel/cli": "^7.0.0-beta.40",
+    "@babel/core": "^7.0.0-beta.40",
+    "@babel/plugin-proposal-class-properties": "^7.0.0-beta.40",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.40",
+    "@babel/preset-env": "^7.0.0-beta.40",
+    "@babel/preset-typescript": "^7.0.0-beta.40",
     "@semantic-release/changelog": "^1.1.1",
     "@semantic-release/git": "^3.1.1",
     "@types/jest": "^22.1.3",
@@ -55,6 +63,7 @@
     "conventional-changelog-eslint": "^1.0.2",
     "jest": "^22.3.0",
     "semantic-release": "^14.0.3",
+    "ts-jest": "^22.0.4",
     "typescript": "^2.7.2"
   },
   "greenkeeper": {
diff --git a/src/MediaScan.ts b/src/MediaScan.ts
index 9552271..d4360ec 100644
--- a/src/MediaScan.ts
+++ b/src/MediaScan.ts
@@ -1,8 +1,8 @@
 // Imports
-import * as FileHound from 'filehound';
+import FileHound from 'filehound';
 import {basename, normalize} from 'path';
 import {uniq, difference, partition, cloneDeep} from 'lodash';
-import * as PromiseLib from 'bluebird';
+import PromiseLib from 'bluebird';
 
 const videosExtension = require('video-extensions');
 const nameParser = require('parse-torrent-title').parse;
@@ -16,7 +16,7 @@ import {
 import {defaultWhichCategoryFunction, promisifiedAccess} from './utils/utils_functions';
 
 // Typescript types
-import * as mediaScan from "./custom_types";
+import mediaScan from "./declaration";
 
 /**
  * Class representing the MediaScan Library
@@ -31,8 +31,9 @@ module.exports = class MediaScan extends EventEmitter {
     protected categoryForFile: Map<string, mediaScan.Category>; // the mapping between file and Category
     protected stores: mediaScan.MapSet<mediaScan.TPN | mediaScan.TPN_Extended>; // where I keep the result of Category
     // constants getter for external purposes (example create a custom whichCategory function)
-    static readonly MOVIES_TYPE = mediaScan.Category.MOVIES_TYPE;
-    static readonly TV_SERIES_TYPE = mediaScan.Category.TV_SERIES_TYPE;
+    // workaround : const string enum aren't compiled correctly with Babel
+    static readonly MOVIES_TYPE = 'MOVIES' as mediaScan.Category.MOVIES_TYPE;
+    static readonly TV_SERIES_TYPE = 'TV_SERIES' as mediaScan.Category.TV_SERIES_TYPE;
 
     constructor({
                     defaultPath = process.cwd(),
@@ -51,8 +52,9 @@ module.exports = class MediaScan extends EventEmitter {
         this.defaultPath = defaultPath;
         this.paths = paths;
         this.stores = new Map();
-        this.stores.set(mediaScan.Category.MOVIES_TYPE, movies);
-        this.stores.set(mediaScan.Category.TV_SERIES_TYPE, series);
+        // workaround : const string enum aren't compiled correctly with Babel
+        this.stores.set(MediaScan.MOVIES_TYPE, movies);
+        this.stores.set(MediaScan.TV_SERIES_TYPE, series);
         this.categoryForFile = allFilesWithCategory;
     }
 
@@ -84,7 +86,8 @@ module.exports = class MediaScan extends EventEmitter {
                     // add it in found files
                     this.categoryForFile.set(file, fileCategory);
                     // also in temp var
-                    if (fileCategory !== mediaScan.Category.TV_SERIES_TYPE) {
+                    // workaround : const string enum aren't compiled correctly with Babel
+                    if (fileCategory !== MediaScan.TV_SERIES_TYPE) {
                         moviesSet.add(jsonFile);
                     } else {
                         tvSeriesSet.add(jsonFile);
@@ -121,8 +124,9 @@ module.exports = class MediaScan extends EventEmitter {
                     });
 
                 // updates the stores var
-                this.stores.set(mediaScan.Category.MOVIES_TYPE, newMovies);
-                this.stores.set(mediaScan.Category.TV_SERIES_TYPE, newTvSeries);
+                // workaround : const string enum aren't compiled correctly with Babel
+                this.stores.set(MediaScan.MOVIES_TYPE, newMovies);
+                this.stores.set(MediaScan.TV_SERIES_TYPE, newTvSeries);
                 resolve();
             } catch (err) {
                 reject(err);
@@ -196,11 +200,13 @@ module.exports = class MediaScan extends EventEmitter {
             try {
                 // get the data to handle this case
                 // in the first group, we got all the tv series files and in the second, the movies
+                // workaround : const string enum aren't compiled correctly with Babel
                 const processData = partition(files, file =>
-                    this.categoryForFile.get(file) === mediaScan.Category.TV_SERIES_TYPE);
+                    this.categoryForFile.get(file) === MediaScan.TV_SERIES_TYPE);
                 // for movies, just an easy removal
+                // workaround : const string enum aren't compiled correctly with Babel
                 this.stores.set(
-                    mediaScan.Category.MOVIES_TYPE,
+                    MediaScan.MOVIES_TYPE,
                     new Set([...this.allMovies]
                         .filter(movie => !(processData[1].includes(movie.filePath)))),
                 );
@@ -224,7 +230,8 @@ module.exports = class MediaScan extends EventEmitter {
                 }
 
                 // save the updated map
-                this.stores.set(mediaScan.Category.TV_SERIES_TYPE, newTvSeriesMap);
+                // workaround : const string enum aren't compiled correctly with Babel
+                this.stores.set(MediaScan.TV_SERIES_TYPE, newTvSeriesMap);
 
                 // remove the mapping
                 files.forEach((file) => {
@@ -246,11 +253,13 @@ module.exports = class MediaScan extends EventEmitter {
     }
 
     get allMovies(): Set<mediaScan.TPN_Extended> {
-        return cloneDeep(this.stores.get(mediaScan.Category.MOVIES_TYPE));
+        // workaround : const string enum aren't compiled correctly with Babel
+        return cloneDeep(this.stores.get(MediaScan.MOVIES_TYPE));
     }
 
     get allTvSeries(): Map<string, Set<mediaScan.TPN_Extended>> {
-        return cloneDeep(this.stores.get(mediaScan.Category.TV_SERIES_TYPE));
+        // workaround : const string enum aren't compiled correctly with Babel
+        return cloneDeep(this.stores.get(MediaScan.TV_SERIES_TYPE));
     }
 
     get allFilesWithCategory(): Map<string, string> {
diff --git a/src/custom_types.ts b/src/declaration.d.ts
similarity index 99%
rename from src/custom_types.ts
rename to src/declaration.d.ts
index d9085bc..6c38665 100644
--- a/src/custom_types.ts
+++ b/src/declaration.d.ts
@@ -131,4 +131,4 @@ declare module MediaScan {
     }
 }
 
-export = MediaScan;
+export default MediaScan;
diff --git a/src/filters/filterBooleanProperty.ts b/src/filters/filterBooleanProperty.ts
index c97fc9d..096be62 100644
--- a/src/filters/filterBooleanProperty.ts
+++ b/src/filters/filterBooleanProperty.ts
@@ -1,5 +1,12 @@
 /** Provides a map with valid default properties */
-import * as MediaScan from "../custom_types";
+import MediaScan from "../declaration";
+
+// Object.entries is not available in Node 6
+const entries = require('object.entries');
+
+if (!Object.entries) {
+    entries.shim();
+}
 
 export function filterDefaultBooleanProperties(searchObject: MediaScan.DefaultSearchParameters): Map<string, boolean> {
     const propertiesNames = ['extended', 'unrated', 'proper', 'repack', 'convert',
diff --git a/src/filters/filterNumberProperty.ts b/src/filters/filterNumberProperty.ts
index b0dfbd7..1fe1886 100644
--- a/src/filters/filterNumberProperty.ts
+++ b/src/filters/filterNumberProperty.ts
@@ -1,4 +1,10 @@
-import * as MediaScan from "../custom_types";
+import MediaScan from "../declaration";
+
+const entries = require('object.entries');
+
+if (!Object.entries) {
+    entries.shim();
+}
 
 /**
  * Convert the param to valid expression object for filter function
diff --git a/src/filters/filterProperties.ts b/src/filters/filterProperties.ts
index cb7cce1..35b7c1a 100644
--- a/src/filters/filterProperties.ts
+++ b/src/filters/filterProperties.ts
@@ -26,7 +26,7 @@ import {
     filterDefaultStringProperties,
     filterByString,
 } from './filterStringProperty';
-import * as MediaScan from "../custom_types";
+import MediaScan from "../declaration";
 
 /**
  * Handle searchParameters provided by user to maps
@@ -52,13 +52,13 @@ function mapProperties(searchParameters: MediaScan.SearchParameters): {
     /* istanbul ignore else */
     if (additionalProperties !== undefined) {
         additionalProperties
-            .filter(newProperty => newProperty.type === MediaScan.AdditionalPropertiesType.BOOLEAN)
+            .filter(newProperty => newProperty.type === 'boolean' as MediaScan.AdditionalPropertiesType.BOOLEAN)
             .forEach((newProperty) => {
                 booleanFieldsSearchMap.set(newProperty.name, newProperty.value as boolean);
             });
 
         additionalProperties
-            .filter(newProperty => newProperty.type === MediaScan.AdditionalPropertiesType.NUMBER)
+            .filter(newProperty => newProperty.type === 'number' as MediaScan.AdditionalPropertiesType.NUMBER)
             .forEach((newProperty) => {
                 let expression = convertToValidExpression(newProperty.value as string|number);
                 /* istanbul ignore else */
@@ -68,7 +68,7 @@ function mapProperties(searchParameters: MediaScan.SearchParameters): {
             });
 
         additionalProperties
-            .filter(newProperty => newProperty.type === MediaScan.AdditionalPropertiesType.STRING)
+            .filter(newProperty => newProperty.type === 'string' as MediaScan.AdditionalPropertiesType.STRING)
             .forEach((newProperty) => {
                 stringFieldsSearchMap.set(newProperty.name, [...newProperty.value]);
             });
diff --git a/src/filters/filterStringProperty.ts b/src/filters/filterStringProperty.ts
index f657c01..68564bd 100644
--- a/src/filters/filterStringProperty.ts
+++ b/src/filters/filterStringProperty.ts
@@ -1,6 +1,11 @@
 /** Provides a map with valid default properties */
-import * as MediaScan from "../custom_types";
-import {convertToValidExpression} from "./filterNumberProperty";
+import MediaScan from "../declaration";
+
+const entries = require('object.entries');
+
+if (!Object.entries) {
+    entries.shim();
+}
 
 export function filterDefaultStringProperties(searchObject: MediaScan.DefaultSearchParameters): Map<string, string | string[]> {
     const propertiesNames = ['title', 'resolution', 'codec', 'audio', 'group',
diff --git a/src/utils/utils_functions.ts b/src/utils/utils_functions.ts
index bc7829a..783284a 100644
--- a/src/utils/utils_functions.ts
+++ b/src/utils/utils_functions.ts
@@ -1,7 +1,10 @@
 // Check properties
 import {access, constants as FsConstants} from "fs";
-import * as PromiseLib from 'bluebird';
-import * as MediaScanLib from "../custom_types";
+import PromiseLib from 'bluebird';
+import MediaScanLib from "../declaration";
+
+// workaround : const string enum aren't compiled correctly with Babel
+const MediaScan = require('../MediaScan');
 
 export function checkProperties(obj, properties): boolean {
     return properties.every(x => x in obj && obj[x]);
@@ -21,5 +24,7 @@ export function promisifiedAccess(path) : Promise<any> {
 
 // Default implementation to know which category is this file
 export function defaultWhichCategoryFunction(object : MediaScanLib.TPN) : MediaScanLib.Category{
-    return (checkProperties(object, ['season', 'episode'])) ? MediaScanLib.Category.TV_SERIES_TYPE : MediaScanLib.Category.MOVIES_TYPE;
+    // workaround : const string enum aren't compiled correctly with Babel
+    return (checkProperties(object, ['season', 'episode']))
+        ? 'TV_SERIES' as MediaScanLib.Category.TV_SERIES_TYPE : 'MOVIES' as MediaScanLib.Category.MOVIES_TYPE;
 }
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 47a308c..57c8287 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,7 @@
 {
   "compilerOptions": {
+    "noEmit": true,
+    "allowSyntheticDefaultImports": true,
     "module": "commonjs",
     "target": "es5",
     "lib": ["ES6","ES2017","ESNext"],