diff --git a/CS186-proj2/pom.xml b/CS186-proj2/pom.xml
index 499c084..6a2536c 100644
--- a/CS186-proj2/pom.xml
+++ b/CS186-proj2/pom.xml
@@ -32,7 +32,7 @@
     <dependency>
         <groupId>org.apache.mina</groupId>
         <artifactId>mina-core</artifactId>
-        <version>2.0.4</version>
+        <version>2.1.5</version>
     </dependency>
     <!-- https://mvnrepository.com/artifact/org.apache.mina/mina-filter-compression -->
     <dependency>