diff --git a/com.pilosa.client/pom.xml b/com.pilosa.client/pom.xml
index 70a3237..3279c3f 100644
--- a/com.pilosa.client/pom.xml
+++ b/com.pilosa.client/pom.xml
@@ -284,7 +284,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.6.1</version>
+            <version>3.16.1</version>
         </dependency>
 
         <dependency>