diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
index b1efe3911a..cf0047cf28 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
@@ -98,8 +98,8 @@ ext {
 dependencies {
     compile "com.squareup.okhttp:okhttp:$okhttp_version"
     compile "com.squareup.retrofit:retrofit:$retrofit_version"
-    compile 'com.google.code.gson:gson:$gson_version'
-    compile 'com.squareup.retrofit:converter-gson:$retrofit_version'
+    compile "com.google.code.gson:gson:$gson_version"
+    compile "com.squareup.retrofit:converter-gson:$retrofit_version"
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
     compile "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/retrofit2/build.gradle b/samples/client/petstore/java/retrofit2/build.gradle
index 0deeeea2e3..29e1737f3b 100644
--- a/samples/client/petstore/java/retrofit2/build.gradle
+++ b/samples/client/petstore/java/retrofit2/build.gradle
@@ -98,8 +98,8 @@ ext {
 dependencies {
     compile "com.squareup.okhttp:okhttp:$okhttp_version"
     compile "com.squareup.retrofit:retrofit:$retrofit_version"
-    compile 'com.google.code.gson:gson:$gson_version'
-    compile 'com.squareup.retrofit:converter-gson:$retrofit_version'
+    compile "com.google.code.gson:gson:$gson_version"
+    compile "com.squareup.retrofit:converter-gson:$retrofit_version"
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
     compile "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
index d4ecd6cd19..47f9908c4d 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
@@ -1,6 +1,6 @@
 package io.swagger.client;
 
-@javax.annotation.Generated(value = "class io.swagger.codegen.languages.JavaClientCodegen", date = "2015-11-29T00:18:18.137+08:00")
+@javax.annotation.Generated(value = "class io.swagger.codegen.languages.JavaClientCodegen", date = "2015-11-28T16:01:49.902+08:00")
 public class StringUtil {
   /**
    * Check if the given array contains the given value (with case-insensitive comparison).