diff --git a/pbj-core/hiero-dependency-versions/build.gradle.kts b/pbj-core/hiero-dependency-versions/build.gradle.kts
index 7e72e4b5..07846bd7 100644
--- a/pbj-core/hiero-dependency-versions/build.gradle.kts
+++ b/pbj-core/hiero-dependency-versions/build.gradle.kts
@@ -23,7 +23,7 @@ plugins {
 
 group = "com.hedera.hashgraph"
 
-val antlr = "4.11.1"
+val antlr = "4.13.2"
 val grpc = "1.65.1"
 val helidon = "4.1.6"
 val protobuf = "4.28.2"