diff --git a/okex-java-sdk-api-v5/pom.xml b/okex-java-sdk-api-v5/pom.xml
index 5a1cbcad..aaf84d50 100644
--- a/okex-java-sdk-api-v5/pom.xml
+++ b/okex-java-sdk-api-v5/pom.xml
@@ -12,7 +12,7 @@
         <java.version>1.8</java.version>
         <netty.version>4.1.36.Final</netty.version>
         <okhttp3.version>3.10.0</okhttp3.version>
-        <retrofit2.version>2.3.0</retrofit2.version>
+        <retrofit2.version>2.9.0</retrofit2.version>
         <fastjson.version>1.2.46</fastjson.version>
         <commons-lang3.version>3.7</commons-lang3.version>
         <commons-collections.version>3.2.2</commons-collections.version>
@@ -95,15 +95,10 @@
             <artifactId>netty-all</artifactId>
             <version>4.1.36.Final</version>
         </dependency>
-        <dependency>
-            <groupId>com.squareup.okhttp3</groupId>
-            <artifactId>okhttp</artifactId>
-            <version>3.10.0</version>
-        </dependency>
         <dependency>
             <groupId>com.squareup.retrofit2</groupId>
             <artifactId>retrofit</artifactId>
-            <version>2.3.0</version>
+            <version>2.9.0</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>