diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ee4d5e5..86ace67 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,7 +1,9 @@
 
 name: Riemann Clojure Client testing
 
-on: [push]
+on:
+  push:
+  workflow_dispatch:
 
 jobs:
   test:
diff --git a/riemann-java-client/pom.xml b/riemann-java-client/pom.xml
index 934ab73..738697c 100644
--- a/riemann-java-client/pom.xml
+++ b/riemann-java-client/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.16.1</version>
+            <version>3.16.3</version>
             <scope>compile</scope>
         </dependency>