diff --git a/build.gradle b/build.gradle
index 726da847e..ab14aa8e6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -121,7 +121,7 @@ dependencies {
     // Java HTTP server library.
     implementation group: 'io.javalin', name: 'javalin', version: '5.5.0'
     // Java WebSocket server & client library.
-    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.2'
+    implementation group: 'org.java-websocket', name: 'Java-WebSocket', version: '1.5.6'
 
     // Google Protocol Buffer definitions.
     // These are the raw '.proto' files.