diff --git a/package.json b/package.json
index 2f963eb..17c3e04 100644
--- a/package.json
+++ b/package.json
@@ -64,6 +64,7 @@
   },
   "dependencies": {
     "@microsoft/tsdoc": "^0.15.0",
+    "@prettier/sync": "^0.5.2",
     "@types/estree": "^1.0.5",
     "@types/unist": "^3.0.3",
     "mdast-util-mdx-jsx": "^3.1.3",
diff --git a/src/transpileCodeblocks/plugin.ts b/src/transpileCodeblocks/plugin.ts
index dd9b8be..165f57f 100644
--- a/src/transpileCodeblocks/plugin.ts
+++ b/src/transpileCodeblocks/plugin.ts
@@ -31,7 +31,7 @@ type PostProcessor = (
   files: VirtualFiles,
   parentFile?: string,
   defaultProcessor?: PostProcessor
-) => Promise<VirtualFiles>;
+) => VirtualFiles;
 
 export interface TranspileCodeblocksSettings {
   compilerSettings: CompilerSettings;
@@ -212,7 +212,7 @@ ${lines.slice(Math.max(0, diagnostic.line - 5), diagnostic.line + 6).join('\n')}
     };
   };
 
-export async function defaultAssembleReplacementNodes(
+export function defaultAssembleReplacementNodes(
   node: CodeNode,
   file: VFile,
   virtualFolder: string,
@@ -220,7 +220,7 @@ export async function defaultAssembleReplacementNodes(
   transpilationResult: Record<string, TranspiledFile>,
   postProcessTs: PostProcessor,
   postProcessTranspiledJs: PostProcessor
-): Promise<Node[]> {
+): Node[] {
   return [
     {
       type: 'mdxJsxFlowElement',
@@ -334,11 +334,7 @@ export async function defaultAssembleReplacementNodes(
             {
               ...node,
               value: rearrangeFiles(
-                await postProcessTs(
-                  virtualFiles,
-                  file.path,
-                  defaultPostProcessTs
-                ),
+                postProcessTs(virtualFiles, file.path, defaultPostProcessTs),
                 virtualFolder
               ),
             } satisfies CodeNode as any,
@@ -359,7 +355,7 @@ export async function defaultAssembleReplacementNodes(
                 ),
               }),
               value: rearrangeFiles(
-                await postProcessTranspiledJs(
+                postProcessTranspiledJs(
                   transpilationResult,
                   file.path,
                   defaultPostProcessTranspiledJs
diff --git a/src/transpileCodeblocks/postProcessing.ts b/src/transpileCodeblocks/postProcessing.ts
index ee69a33..b5b6f65 100644
--- a/src/transpileCodeblocks/postProcessing.ts
+++ b/src/transpileCodeblocks/postProcessing.ts
@@ -1,57 +1,50 @@
 import type { VirtualFiles } from './plugin.js';
-import prettier from 'prettier';
+import type { Options as PrettierOptions } from 'prettier';
+import prettierSync from '@prettier/sync';
 
-export async function defaultPostProcessTs(
+export function defaultPostProcessTs(
   files: VirtualFiles,
   parentFile?: string
-): Promise<VirtualFiles> {
+): VirtualFiles {
   return fromEntries(
-    await Promise.all(
-      Object.entries(files).map(async ([name, file]) => {
-        const prettyCode = await prettify(file.code, name, parentFile || name);
+    Object.entries(files).map(([name, file]) => {
+      const prettyCode = prettify(file.code, name, parentFile || name);
 
-        return [
-          name,
-          {
-            ...file,
-            code: prettyCode.trim(),
-          },
-        ];
-      })
-    )
+      return [
+        name,
+        {
+          ...file,
+          code: prettyCode.trim(),
+        },
+      ];
+    })
   );
 }
 
-export async function defaultPostProcessTranspiledJs(
+export function defaultPostProcessTranspiledJs(
   files: VirtualFiles,
   parentFile?: string
-): Promise<VirtualFiles> {
+): VirtualFiles {
   return fromEntries(
-    await Promise.all(
-      Object.entries(files).map(async ([name, file]) => {
-        const mangledCode = file.code.replace(
-          /(\n\s*|)\/\/ (@ts-ignore|@ts-expect-error).*$/gm,
-          ''
-        );
-        const prettyCode = await prettify(
-          mangledCode,
-          name,
-          parentFile || name
-        );
+    Object.entries(files).map(([name, file]) => {
+      const mangledCode = file.code.replace(
+        /(\n\s*|)\/\/ (@ts-ignore|@ts-expect-error).*$/gm,
+        ''
+      );
+      const prettyCode = prettify(mangledCode, name, parentFile || name);
 
-        return [
-          name.replace(/.t(sx?)$/, '.j$1'),
-          {
-            ...file,
-            code: prettyCode.trim(),
-          },
-        ];
-      })
-    )
+      return [
+        name.replace(/.t(sx?)$/, '.j$1'),
+        {
+          ...file,
+          code: prettyCode.trim(),
+        },
+      ];
+    })
   );
 }
 
-let lastConfig: prettier.Options | null;
+let lastConfig: PrettierOptions | null;
 let lastParentFile: string;
 
 /**
@@ -60,13 +53,9 @@ let lastParentFile: string;
  * @param {string} fileName
  * @param {string} parentFile
  */
-async function prettify(
-  sourceCode: string,
-  fileName: string,
-  parentFile: string
-) {
+function prettify(sourceCode: string, fileName: string, parentFile: string) {
   if (lastParentFile !== parentFile) {
-    lastConfig = await prettier.resolveConfig(parentFile);
+    lastConfig = prettierSync.resolveConfig(parentFile);
   }
   if (!lastConfig) {
     console.error(
@@ -74,7 +63,7 @@ async function prettify(
     );
     return sourceCode;
   }
-  return prettier.format(sourceCode, {
+  return prettierSync.format(sourceCode, {
     ...lastConfig,
     filepath: fileName,
   });
diff --git a/yarn.lock b/yarn.lock
index d139236..375aa7b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -487,6 +487,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@prettier/sync@npm:^0.5.2":
+  version: 0.5.2
+  resolution: "@prettier/sync@npm:0.5.2"
+  dependencies:
+    make-synchronized: "npm:^0.2.8"
+  peerDependencies:
+    prettier: "*"
+  checksum: 10/172cdc62f4103b022f8e8d0a63839350d97bc51468ea476594bce651c2cda311e4810417f16a3c967941a8493a68468a5df27beea4c85eaeaa37e84be3acf399
+  languageName: node
+  linkType: hard
+
 "@rollup/rollup-android-arm-eabi@npm:4.21.1":
   version: 4.21.1
   resolution: "@rollup/rollup-android-arm-eabi@npm:4.21.1"
@@ -2796,6 +2807,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"make-synchronized@npm:^0.2.8":
+  version: 0.2.9
+  resolution: "make-synchronized@npm:0.2.9"
+  checksum: 10/d12c540719641f05f4e40bae5625b7e5ac9dded364e7f97ef3fd8baa1bcbd016f873c5281e4719e321a612635accf0a9e2c07a37d215240b549b99ed0d8a1b3f
+  languageName: node
+  linkType: hard
+
 "mdast-util-from-markdown@npm:^2.0.0":
   version: 2.0.1
   resolution: "mdast-util-from-markdown@npm:2.0.1"
@@ -4108,6 +4126,7 @@ __metadata:
   resolution: "remark-typescript-tools@workspace:."
   dependencies:
     "@microsoft/tsdoc": "npm:^0.15.0"
+    "@prettier/sync": "npm:^0.5.2"
     "@types/estree": "npm:^1.0.5"
     "@types/node": "npm:^22.5.4"
     "@types/react": "npm:^18.3.5"