diff --git a/project/antlr4.sbt b/project/antlr4.sbt
index 5147fe1..ed422af 100644
--- a/project/antlr4.sbt
+++ b/project/antlr4.sbt
@@ -1 +1 @@
-addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.8.2")
+addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.8.3")
diff --git a/project/build.properties b/project/build.properties
index d91c272..2cd20b6 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.6
+sbt.version=1.4.7