diff --git a/config.xml b/config.xml
index a09a6ac9c61b09386d15094cac5757e4e94f70e5..0f92a8925f6d6fc6c5364a5e96f0043104675339 100644
--- a/config.xml
+++ b/config.xml
@@ -1629,9 +1629,9 @@
   </views>
   <primaryView>Mobile</primaryView>
   <slaveAgentPort>49434</slaveAgentPort>
-  <enabledAgentProtocols>
-    <string>JNLP3-connect</string>
-  </enabledAgentProtocols>
+  <disabledAgentProtocols>
+    <string>JNLP4-connect</string>
+  </disabledAgentProtocols>
   <label></label>
   <crumbIssuer class="hudson.security.csrf.DefaultCrumbIssuer">
     <excludeClientIPFromCrumb>true</excludeClientIPFromCrumb>