diff --git a/extractor/build.gradle b/extractor/build.gradle
index 4b6545d7ac..7baad75d36 100644
--- a/extractor/build.gradle
+++ b/extractor/build.gradle
@@ -28,7 +28,7 @@ checkstyleTest {
 
 ext {
     rhinoVersion = '1.8.0'
-    protobufVersion = '4.30.2'
+    protobufVersion = '4.31.1'
 }
 
 dependencies {