diff --git a/pom.xml b/pom.xml
index e1ff6a2..1ef26d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
     <groupId>com.networknt</groupId>
     <artifactId>light-proxy</artifactId>
     <packaging>jar</packaging>
-    <version>1.5.20</version>
+    <version>1.5.21</version>
     <name>light-proxy</name>
     <description>Light Proxy</description>
     <url>https://github.com/networknt/light-proxy</url>
@@ -52,9 +52,9 @@
     <properties>
         <java.version>1.8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <version.light-4j>1.5.20</version.light-4j>
-        <version.light-rest-4j>1.5.20</version.light-rest-4j>
-        <version.openapi-parser>1.5.20</version.openapi-parser>
+        <version.light-4j>1.5.21</version.light-4j>
+        <version.light-rest-4j>1.5.21</version.light-rest-4j>
+        <version.openapi-parser>1.5.21</version.openapi-parser>
         <version.jackson>2.9.5</version.jackson>
         <version.slf4j>1.7.25</version.slf4j>
         <version.jose4j>0.6.3</version.jose4j>