diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2c2742a05..f8757bca0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,7 +22,7 @@ Please follow the steps below in order to make the changes:
 
    ```shell script
    # This will install the library (including your recent changes) in your local maven repository.
-   ./gradlew clean install
+   ./gradlew clean build publishToMavenLocal
    ```
    
 4. Build the plugin project with updated `graphql-java-codegen` library.
@@ -43,7 +43,7 @@ Please follow the steps below in order to make the changes:
    ```shell script
    # Install Gradle plugin
    cd plugins/graphql-java-codegen-gradle-plugin/graphql-codegen-gradle-plugin
-   ./gradlew clean install
+   ./gradlew clean build publishToMavenLocal
    
    # Install Maven plugin
    cd plugins/graphql-java-codegen-maven-plugin
diff --git a/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.jar b/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.jar
deleted file mode 100644
index 5c2d1cf01..000000000
Binary files a/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.jar and /dev/null differ
diff --git a/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.properties b/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index b5dd81f04..000000000
--- a/plugins/graphql-java-codegen-gradle-plugin/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,6 +0,0 @@
-#Mon Sep 16 22:19:34 CDT 2019
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
diff --git a/plugins/graphql-java-codegen-gradle-plugin/gradlew b/plugins/graphql-java-codegen-gradle-plugin/gradlew
index 8e25e6c19..63ed722a2 100755
--- a/plugins/graphql-java-codegen-gradle-plugin/gradlew
+++ b/plugins/graphql-java-codegen-gradle-plugin/gradlew
@@ -80,7 +80,7 @@ case "`uname`" in
     ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH=$APP_HOME/../../gradle/wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
diff --git a/plugins/graphql-java-codegen-gradle-plugin/gradlew.bat b/plugins/graphql-java-codegen-gradle-plugin/gradlew.bat
index 9618d8d96..6f51bda83 100644
--- a/plugins/graphql-java-codegen-gradle-plugin/gradlew.bat
+++ b/plugins/graphql-java-codegen-gradle-plugin/gradlew.bat
@@ -79,7 +79,7 @@ set CMD_LINE_ARGS=%*
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+set CLASSPATH=%APP_HOME%\..\..\gradle\wrapper\gradle-wrapper.jar
 
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
diff --git a/plugins/graphql-java-codegen-gradle-plugin/graphql-codegen-gradle-plugin/src/main/java/io/github/kobylynskyi/graphql/codegen/gradle/GraphqlCodegenGradleTask.java b/plugins/graphql-java-codegen-gradle-plugin/graphql-codegen-gradle-plugin/src/main/java/io/github/kobylynskyi/graphql/codegen/gradle/GraphqlCodegenGradleTask.java
index 4d12a714b..743f48457 100644
--- a/plugins/graphql-java-codegen-gradle-plugin/graphql-codegen-gradle-plugin/src/main/java/io/github/kobylynskyi/graphql/codegen/gradle/GraphqlCodegenGradleTask.java
+++ b/plugins/graphql-java-codegen-gradle-plugin/graphql-codegen-gradle-plugin/src/main/java/io/github/kobylynskyi/graphql/codegen/gradle/GraphqlCodegenGradleTask.java
@@ -176,7 +176,7 @@ public void setCustomAnnotationsMapping(Map<String, String> customAnnotationsMap
 
     @Input
     @Optional
-    public boolean getGenerateEqualsAndHashCode() {
+    public Boolean getGenerateEqualsAndHashCode() {
         return generateEqualsAndHashCode;
     }