diff --git a/extensions/protobuf/build.gradle b/extensions/protobuf/build.gradle
index 96e53642c9d..0b1f14da633 100644
--- a/extensions/protobuf/build.gradle
+++ b/extensions/protobuf/build.gradle
@@ -1,7 +1,7 @@
 plugins {
     id 'java-library'
     id 'io.deephaven.project.register'
-    id 'com.google.protobuf' version '0.9.4'
+    id 'com.google.protobuf' version '0.9.5'
 }
 
 dependencies {