diff --git a/modules/lang-painless/build.gradle b/modules/lang-painless/build.gradle
index f29c48aecf5df..0dadf4af6df95 100644
--- a/modules/lang-painless/build.gradle
+++ b/modules/lang-painless/build.gradle
@@ -48,7 +48,7 @@ testClusters.all {
 }
 
 dependencies {
-  api 'org.antlr:antlr4-runtime:4.9.3'
+  api 'org.antlr:antlr4-runtime:4.12.0'
   api "org.ow2.asm:asm-util:${versions.asm}"
   api "org.ow2.asm:asm-tree:${versions.asm}"
   api "org.ow2.asm:asm-commons:${versions.asm}"
@@ -155,7 +155,7 @@ configurations {
 }
 
 dependencies {
-  regenerate 'org.antlr:antlr4:4.9.3'
+  regenerate 'org.antlr:antlr4:4.12.0'
 }
 
 String grammarPath = 'src/main/antlr'