diff --git a/pom.xml b/pom.xml
index 59430da..0b8add5 100755
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
         <dependency>
             <groupId>org.apache.flink</groupId>
             <artifactId>flink-java</artifactId>
-            <version>${flink.version}</version>
+            <version>1.8.0</version>
             <scope>provided</scope>
         </dependency>
 
@@ -73,7 +73,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
 
@@ -87,7 +87,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>
-            <version>1.7.7</version>
+            <version>1.7.34</version>
             <scope>runtime</scope>
         </dependency>
 
@@ -205,7 +205,7 @@
                 <dependency>
                     <groupId>org.apache.flink</groupId>
                     <artifactId>flink-java</artifactId>
-                    <version>${flink.version}</version>
+                    <version>1.8.0</version>
                     <scope>compile</scope>
                 </dependency>
                 <dependency>
@@ -217,7 +217,7 @@
                 <dependency>
                     <groupId>org.apache.flink</groupId>
                     <artifactId>flink-clients_2.11</artifactId>
-                    <version>${flink.version}</version>
+                    <version>1.13.3</version>
                 </dependency>
                 <dependency>
                     <groupId>org.apache.flink</groupId>