diff --git a/Makefile b/Makefile
index 5f69ba7e..6de01dd2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 ROOT_DIR:=$(shell pwd)
-ANTLR_VERSION=9
+ANTLR_VERSION=13.1
 
 all : download_antlr_jar draft2 v1 v1_1 v2
 
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e9573acc..eeddfd55 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,7 +1,8 @@
 # Change log
 
 ## in develop
-...
+
+* ANTLR4 version bump to 4.13.1
 
 ## 0.17.16 (2023-05-26)
 
diff --git a/build.sbt b/build.sbt
index 135f2d42..4ee38705 100644
--- a/build.sbt
+++ b/build.sbt
@@ -45,7 +45,7 @@ lazy val wdlTools = project
 
 lazy val dependencies = {
   val dxCommonVersion = "0.11.5"
-  val antlr4Version = "4.9.3"
+  val antlr4Version = "4.13.1"
   val scallopVersion = "4.1.0"
   val typesafeVersion = "1.4.1"
   val scalateVersion = "1.9.7"