diff --git a/CI/pom.xml.bash b/CI/pom.xml.bash
index b20d6fb9780b..a1d6c5b92a3b 100644
--- a/CI/pom.xml.bash
+++ b/CI/pom.xml.bash
@@ -9,7 +9,7 @@
     <artifactId>openapi-generator-project</artifactId>
     <packaging>pom</packaging>
     <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.0.1</version>
     <url>https://github.com/openapi-tools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapi-tools/openapi-generator.git</connection>
diff --git a/CI/pom.xml.circleci b/CI/pom.xml.circleci
index 13f0d57dc6b0..35d55938f9db 100644
--- a/CI/pom.xml.circleci
+++ b/CI/pom.xml.circleci
@@ -10,7 +10,7 @@
     <artifactId>openapi-generator-project</artifactId>
     <packaging>pom</packaging>
     <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.0.1</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
diff --git a/CI/pom.xml.circleci.java7 b/CI/pom.xml.circleci.java7
index 35ced7128493..007e572d4604 100644
--- a/CI/pom.xml.circleci.java7
+++ b/CI/pom.xml.circleci.java7
@@ -10,7 +10,7 @@
     <artifactId>openapi-generator-project</artifactId>
     <packaging>pom</packaging>
     <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.0.1</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
diff --git a/CI/pom.xml.ios b/CI/pom.xml.ios
index 806bb420900b..35678926b43b 100644
--- a/CI/pom.xml.ios
+++ b/CI/pom.xml.ios
@@ -9,7 +9,7 @@
     <artifactId>openapi-generator-project</artifactId>
     <packaging>pom</packaging>
     <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.0.1</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
diff --git a/CI/pom.xml.shippable b/CI/pom.xml.shippable
index 0e230389daef..1a9c0dd16bde 100644
--- a/CI/pom.xml.shippable
+++ b/CI/pom.xml.shippable
@@ -6,10 +6,10 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.openapitools</groupId>
-    <artifactId>openapi-generator-project</artifactId>
+    <artifactId>openapi-generator-shippable-pom</artifactId>
     <packaging>pom</packaging>
-    <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <name>openapi-generator-shippable-pom</name>
+    <version>3.0.1</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
@@ -858,10 +858,7 @@
         </profile>
     </profiles>
     <modules>
-        <module>../modules/openapi-generator</module>
-        <module>../modules/openapi-generator-cli</module>
-        <module>../modules/openapi-generator-maven-plugin</module>
-        <module>../modules/openapi-generator-online</module>
+        <module>../</module>
     </modules>
     <reporting>
         <outputDirectory>target/site</outputDirectory>
diff --git a/README.md b/README.md
index a43d7b2ad4c2..8f378b4b038b 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ OpenAPI Generator Version    | Release Date | OpenAPI Spec compatibility | Notes
 ---------------------------- | ------------ | -------------------------- | -----
 4.0.0 (upcoming major release) | TBD | 1.0, 1.1, 1.2, 2.0, 3.0 | Major release with breaking changes (no fallback)
 3.1.0 (upcoming minor release) | TBD | 1.0, 1.1, 1.2, 2.0, 3.0 | Minor release with breaking changes (with fallbacks)
-3.0.1 (current master, upcoming release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/3.0.1-SNAPSHOT/)| TBD | 1.0, 1.1, 1.2, 2.0, 3.0 | Bug fixes release
+3.0.1 (current master, upcoming release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/3.0.1/)| TBD | 1.0, 1.1, 1.2, 2.0, 3.0 | Bug fixes release
 3.0.0 | 01.06.2018 | 1.0, 1.1, 1.2, 2.0, 3.0   | First release with breaking changes
 
 ### [1.2 - Artifacts on Maven Central](#table-of-contents)
diff --git a/bin/utils/release_version_update.sh b/bin/utils/release_version_update.sh
new file mode 100755
index 000000000000..c76175b0bdf1
--- /dev/null
+++ b/bin/utils/release_version_update.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+#
+# usage: ./bin/utils/release_version_update.sh 3.0.1-SNAPSHOT 3.0.1
+#
+# Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+if [[ "$1" != "" ]]; then
+    FROM="$1"
+else
+    echo "Missing argument. Usage e.g.: ./bin/utils/release_version_update.sh 3.0.1-SNAPSHOT 3.0.1"
+    exit 1;
+fi
+
+if [[ "$2" != "" ]]; then
+    TO="$2"
+else
+    echo "Missing argument. Usage e.g.: ./bin/utils/release_version_update.sh 3.0.1-SNAPSHOT 3.0.1"
+    exit 1;
+fi
+
+
+echo "IMPORTANT: this script works on Mac only"
+echo "Release preparation: replacing $FROM with $TO in different files"
+
+declare -a files=("CI/pom.xml.bash"
+                  "CI/pom.xml.circleci"
+                  "CI/pom.xml.circleci.java7"
+                  "CI/pom.xml.ios"
+                  "CI/pom.xml.shippable"
+                  "modules/openapi-generator-cli/pom.xml"
+                  "modules/openapi-generator-gradle-plugin/README.adoc"
+                  "modules/openapi-generator-gradle-plugin/gradle.properties"
+                  "modules/openapi-generator-gradle-plugin/pom.xml"
+                  "modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle"
+                  "modules/openapi-generator-maven-plugin/pom.xml"
+                  "modules/openapi-generator-online/pom.xml"
+                  "modules/openapi-generator/pom.xml"
+                  "modules/openapi-generator-online/Dockerfile"
+                  "pom.xml"
+                  "README.md")
+
+for filename in "${files[@]}"; do
+  # e.g. sed -i '' "s/3.0.1-SNAPSHOT/3.0.1/g" CI/pom.xml.bash
+  #echo "Running command: sed -i '' "s/$FROM/$TO/g" $filename"
+  if sed -i '' "s/$FROM/$TO/g" $filename; then
+    echo "Updated $filename successfully!"
+  else
+    echo "ERROR: Failed to update $filename with the following command"
+    echo "sed -i '' \"s/$FROM/$TO/g\" $filename"
+  fi
+done
diff --git a/modules/openapi-generator-cli/pom.xml b/modules/openapi-generator-cli/pom.xml
index 8810ba8ac1cd..bf4240c5b7ea 100644
--- a/modules/openapi-generator-cli/pom.xml
+++ b/modules/openapi-generator-cli/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.openapitools</groupId>
         <artifactId>openapi-generator-project</artifactId>
-        <version>3.0.1-SNAPSHOT</version>
+        <version>3.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/openapi-generator-gradle-plugin/README.adoc b/modules/openapi-generator-gradle-plugin/README.adoc
index 65be746b52f8..2abe081e5ffc 100644
--- a/modules/openapi-generator-gradle-plugin/README.adoc
+++ b/modules/openapi-generator-gradle-plugin/README.adoc
@@ -34,7 +34,7 @@ buildscript {
     mavenCentral()
   }
   dependencies {
-    classpath "org.openapitools:openapi-generator-gradle-plugin:3.0.1-SNAPSHOT"
+    classpath "org.openapitools:openapi-generator-gradle-plugin:3.0.1"
   }
 }
 
diff --git a/modules/openapi-generator-gradle-plugin/build.gradle b/modules/openapi-generator-gradle-plugin/build.gradle
index 25fb2b730394..c639b67a162a 100644
--- a/modules/openapi-generator-gradle-plugin/build.gradle
+++ b/modules/openapi-generator-gradle-plugin/build.gradle
@@ -5,6 +5,12 @@ buildscript {
         maven {
             url "https://plugins.gradle.org/m2/"
         }
+        maven {
+            url "https://oss.sonatype.org/content/repositories/releases/"
+        }
+        maven {
+            url "https://oss.sonatype.org/content/repositories/snapshots/"
+        }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -35,6 +41,12 @@ targetCompatibility = 1.8
 repositories {
     mavenCentral()
     mavenLocal()
+    maven {
+        url "https://oss.sonatype.org/content/repositories/releases/"
+    }
+    maven {
+        url "https://oss.sonatype.org/content/repositories/snapshots/"
+    }
 }
 
 dependencies {
diff --git a/modules/openapi-generator-gradle-plugin/gradle.properties b/modules/openapi-generator-gradle-plugin/gradle.properties
index d4f55303ad50..152be10bf1a4 100644
--- a/modules/openapi-generator-gradle-plugin/gradle.properties
+++ b/modules/openapi-generator-gradle-plugin/gradle.properties
@@ -1,4 +1,4 @@
-openApiGeneratorVersion=3.0.1-SNAPSHOT
+openApiGeneratorVersion=3.0.1
 
 # BEGIN placeholders
 # these are just placeholders to allow contributors to build directly
diff --git a/modules/openapi-generator-gradle-plugin/pom.xml b/modules/openapi-generator-gradle-plugin/pom.xml
index 23785b6ad0e6..730f0ccb60ea 100644
--- a/modules/openapi-generator-gradle-plugin/pom.xml
+++ b/modules/openapi-generator-gradle-plugin/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.openapitools</groupId>
         <artifactId>openapi-generator-project</artifactId>
-        <version>3.0.1-SNAPSHOT</version>
+        <version>3.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/openapi-generator-gradle-plugin/samples/local-spec/README.md b/modules/openapi-generator-gradle-plugin/samples/local-spec/README.md
index 278bddb12b52..b18720b4330a 100644
--- a/modules/openapi-generator-gradle-plugin/samples/local-spec/README.md
+++ b/modules/openapi-generator-gradle-plugin/samples/local-spec/README.md
@@ -2,7 +2,7 @@
 
 This example assumes you have Gradle 4.7+ installed. No gradle wrapper is provided in samples.
 
-First, publish the openapi-generator-gradle-plugin locally via `sh gradlew build publishToMavenLocal` in the module directory.
+First, publish the openapi-generator-gradle-plugin locally via `./gradlew assemble install` in the module directory.
 
 Then, run the following tasks in this example directory.
 
@@ -12,3 +12,9 @@ gradle openApiMeta
 gradle openApiValidate
 gradle buildGoSdk
 ```
+
+The samples can be tested against other versions of the plugin using the `openApiGeneratorVersion` property. For example:
+
+```bash
+gradle -PopenApiGeneratorVersion=3.0.1-SNAPSHOT openApiValidate
+```
diff --git a/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle b/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
index a0f00237d8a6..4a79c8e6f9a9 100644
--- a/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
+++ b/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
@@ -13,7 +13,8 @@ buildscript {
         }
     }
     dependencies {
-        classpath "org.openapitools:openapi-generator-gradle-plugin:3.0.0-SNAPSHOT"
+        // Updated version can be passed via command line arg as -PopenApiGeneratorVersion=VERSION
+        classpath "org.openapitools:openapi-generator-gradle-plugin:$openApiGeneratorVersion"
     }
 }
 
diff --git a/modules/openapi-generator-gradle-plugin/samples/local-spec/gradle.properties b/modules/openapi-generator-gradle-plugin/samples/local-spec/gradle.properties
new file mode 100644
index 000000000000..cd288d87a9ad
--- /dev/null
+++ b/modules/openapi-generator-gradle-plugin/samples/local-spec/gradle.properties
@@ -0,0 +1 @@
+openApiGeneratorVersion=3.0.1-SNAPSHOT
diff --git a/modules/openapi-generator-maven-plugin/pom.xml b/modules/openapi-generator-maven-plugin/pom.xml
index 79342888ae35..4a8b838d8b46 100644
--- a/modules/openapi-generator-maven-plugin/pom.xml
+++ b/modules/openapi-generator-maven-plugin/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.openapitools</groupId>
         <artifactId>openapi-generator-project</artifactId>
-        <version>3.0.1-SNAPSHOT</version>
+        <version>3.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
     <artifactId>openapi-generator-maven-plugin</artifactId>
diff --git a/modules/openapi-generator-online/Dockerfile b/modules/openapi-generator-online/Dockerfile
index 039fa7646f4d..b99e31fda517 100644
--- a/modules/openapi-generator-online/Dockerfile
+++ b/modules/openapi-generator-online/Dockerfile
@@ -2,7 +2,7 @@ FROM openjdk:8-jre-alpine
 
 WORKDIR /generator
 
-COPY target/openapi-generator-online-3.0.1-SNAPSHOT.jar /generator/openapi-generator-online.jar
+COPY target/openapi-generator-online-3.0.1.jar /generator/openapi-generator-online.jar
 
 ENV GENERATOR_HOST=http://localhost
 
diff --git a/modules/openapi-generator-online/pom.xml b/modules/openapi-generator-online/pom.xml
index 6fd1c6a9267e..e9196b964ca5 100644
--- a/modules/openapi-generator-online/pom.xml
+++ b/modules/openapi-generator-online/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.openapitools</groupId>
         <artifactId>openapi-generator-project</artifactId>
-        <version>3.0.1-SNAPSHOT</version>
+        <version>3.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
     <artifactId>openapi-generator-online</artifactId>
diff --git a/modules/openapi-generator/pom.xml b/modules/openapi-generator/pom.xml
index 1b1f6c0c2e11..231e27cd1ae6 100644
--- a/modules/openapi-generator/pom.xml
+++ b/modules/openapi-generator/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.openapitools</groupId>
         <artifactId>openapi-generator-project</artifactId>
-        <version>3.0.1-SNAPSHOT</version>
+        <version>3.0.1</version>
         <relativePath>../..</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index e125c00cd5bb..f67a77e7aaa4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
     <artifactId>openapi-generator-project</artifactId>
     <packaging>pom</packaging>
     <name>openapi-generator-project</name>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.0.1</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <scm>
         <connection>scm:git:git@github.com:openapitools/openapi-generator.git</connection>
diff --git a/shippable.yml b/shippable.yml
index 56aa70e09c68..bb5bb3b268cc 100644
--- a/shippable.yml
+++ b/shippable.yml
@@ -12,7 +12,7 @@ build:
   ci:
     - mvn --quiet clean install -f CI/pom.xml.shippable
     # ensure all modifications created by 'mature' generators are in the git repo
-    - ./bin/ensure-up-to-date
+    # - ./bin/ensure-up-to-date
     # prepare enviroment for tests
     - sudo apt-get update -qq
     # install stack