diff --git a/distributedsystem/ds-ha/pom.xml b/distributedsystem/ds-ha/pom.xml
index 14c211b..aa9a679 100644
--- a/distributedsystem/ds-ha/pom.xml
+++ b/distributedsystem/ds-ha/pom.xml
@@ -13,7 +13,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <flink.version>1.9.0</flink.version>
+        <flink.version>1.11.3</flink.version>
         <scala.binary.version>2.11</scala.binary.version>
         <jetcd-version>0.3.0</jetcd-version>
     </properties>