diff --git a/gradle.properties b/gradle.properties
index aa01f351bad..26d8fcedc34 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -20,7 +20,7 @@ group=org.apache.kafka
 #  - tests/kafkatest/__init__.py
 #  - tests/kafkatest/version.py (variable DEV_VERSION)
 #  - kafka-merge-pr.py
-version=2.2.0
+version=2.2.1-SNAPSHOT
 scalaVersion=2.12.8
 task=build
 org.gradle.jvmargs=-Xmx1024m -Xss2m
diff --git a/kafka-merge-pr.py b/kafka-merge-pr.py
index 7bfeb2d7865..a366da3b32f 100755
--- a/kafka-merge-pr.py
+++ b/kafka-merge-pr.py
@@ -70,7 +70,7 @@ TEMP_BRANCH_PREFIX = "PR_TOOL"
 
 DEV_BRANCH_NAME = "trunk"
 
-DEFAULT_FIX_VERSION = os.environ.get("DEFAULT_FIX_VERSION", "2.2.0")
+DEFAULT_FIX_VERSION = os.environ.get("DEFAULT_FIX_VERSION", "2.2.1")
 
 def get_json(url):
     try:
diff --git a/streams/quickstart/java/pom.xml b/streams/quickstart/java/pom.xml
index f5a5a9d9d1f..5bd72c692ad 100644
--- a/streams/quickstart/java/pom.xml
+++ b/streams/quickstart/java/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.apache.kafka</groupId>
         <artifactId>streams-quickstart</artifactId>
-        <version>2.2.0</version>
+        <version>2.2.1-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/streams/quickstart/java/src/main/resources/archetype-resources/pom.xml b/streams/quickstart/java/src/main/resources/archetype-resources/pom.xml
index 549056ede84..2ac9b1b54e5 100644
--- a/streams/quickstart/java/src/main/resources/archetype-resources/pom.xml
+++ b/streams/quickstart/java/src/main/resources/archetype-resources/pom.xml
@@ -29,7 +29,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <kafka.version>2.2.0</kafka.version>
+        <kafka.version>2.2.1-SNAPSHOT</kafka.version>
         <slf4j.version>1.7.7</slf4j.version>
         <log4j.version>1.2.17</log4j.version>
     </properties>
diff --git a/streams/quickstart/pom.xml b/streams/quickstart/pom.xml
index 9aee0e49ebb..e556bcabd79 100644
--- a/streams/quickstart/pom.xml
+++ b/streams/quickstart/pom.xml
@@ -22,7 +22,7 @@
     <groupId>org.apache.kafka</groupId>
     <artifactId>streams-quickstart</artifactId>
     <packaging>pom</packaging>
-    <version>2.2.0</version>
+    <version>2.2.1-SNAPSHOT</version>
 
     <name>Kafka Streams :: Quickstart</name>
 
diff --git a/tests/kafkatest/__init__.py b/tests/kafkatest/__init__.py
index fbc53a44a00..c9d2fd3eab0 100644
--- a/tests/kafkatest/__init__.py
+++ b/tests/kafkatest/__init__.py
@@ -22,4 +22,4 @@
 # Instead, in development branches, the version should have a suffix of the form ".devN"
 #
 # For example, when Kafka is at version 1.0.0-SNAPSHOT, this should be something like "1.0.0.dev0"
-__version__ = '2.2.0'
+__version__ = '2.2.1-SNAPSHOT'
diff --git a/tests/kafkatest/version.py b/tests/kafkatest/version.py
index 264eec5402e..6d96f8d4488 100644
--- a/tests/kafkatest/version.py
+++ b/tests/kafkatest/version.py
@@ -60,7 +60,7 @@ def get_version(node=None):
         return DEV_BRANCH
 
 DEV_BRANCH = KafkaVersion("dev")
-DEV_VERSION = KafkaVersion("2.2.0-SNAPSHOT")
+DEV_VERSION = KafkaVersion("2.2.1-SNAPSHOT")
 
 # 0.8.2.x versions
 V_0_8_2_1 = KafkaVersion("0.8.2.1")