diff --git a/pom.xml b/pom.xml
index 23448ee..8c2577e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,7 +58,7 @@
     <dependency>
       <groupId>com.github.nkzawa</groupId>
       <artifactId>engine.io-client</artifactId>
-      <version>0.4.0-SNAPSHOT</version>
+      <version>0.4.0</version>
     </dependency>
     <dependency>
       <groupId>org.json</groupId>