diff --git a/pgp-keys-map-test1/pom.xml b/pgp-keys-map-test1/pom.xml
index bcf09f85b..6d0218218 100644
--- a/pgp-keys-map-test1/pom.xml
+++ b/pgp-keys-map-test1/pom.xml
@@ -115,7 +115,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>[3.21.2]</version>
+            <version>[3.21.4]</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.maven-scm-provider-svnjava</groupId>