diff --git a/committer-tools/kafka-merge-pr.py b/committer-tools/kafka-merge-pr.py
index d649181d746..be860786879 100755
--- a/committer-tools/kafka-merge-pr.py
+++ b/committer-tools/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", "4.1.0")
+DEFAULT_FIX_VERSION = os.environ.get("DEFAULT_FIX_VERSION", "4.2.0")
 
 ORIGINAL_HEAD = ""
 
diff --git a/docs/js/templateData.js b/docs/js/templateData.js
index cb834035f44..5ab87d9f7c5 100644
--- a/docs/js/templateData.js
+++ b/docs/js/templateData.js
@@ -17,8 +17,8 @@ limitations under the License.
 
 // Define variables for doc templates
 var context={
-    "version": "41",
-    "dotVersion": "4.1",
-    "fullDotVersion": "4.1.0",
+    "version": "42",
+    "dotVersion": "4.2",
+    "fullDotVersion": "4.2.0",
     "scalaVersion": "2.13"
 };
diff --git a/gradle.properties b/gradle.properties
index 52bf115819d..8855ff83623 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -23,7 +23,7 @@ group=org.apache.kafka
 #  - streams/quickstart/pom.xml
 #  - streams/quickstart/java/src/main/resources/archetype-resources/pom.xml
 #  - streams/quickstart/java/pom.xml
-version=4.1.0-SNAPSHOT
+version=4.2.0-SNAPSHOT
 scalaVersion=2.13.16
 # Adding swaggerVersion in gradle.properties to have a single version in place for swagger
 swaggerVersion=2.2.25
diff --git a/streams/quickstart/java/pom.xml b/streams/quickstart/java/pom.xml
index 9e6d406898c..8242e4222e5 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>4.1.0-SNAPSHOT</version>
+        <version>4.2.0-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 133d0ee951e..f8432b84c84 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>4.1.0-SNAPSHOT</kafka.version>
+        <kafka.version>4.2.0-SNAPSHOT</kafka.version>
         <slf4j.version>2.0.16</slf4j.version>
     </properties>
 
diff --git a/streams/quickstart/pom.xml b/streams/quickstart/pom.xml
index 021e9d0c0d6..56876ef463b 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>4.1.0-SNAPSHOT</version>
+    <version>4.2.0-SNAPSHOT</version>
 
     <name>Kafka Streams :: Quickstart</name>
 
diff --git a/tests/kafkatest/__init__.py b/tests/kafkatest/__init__.py
index 99c9dfe22e7..3a7968f11a5 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__ = '4.1.0.dev0'
+__version__ = '4.2.0.dev0'
diff --git a/tests/kafkatest/version.py b/tests/kafkatest/version.py
index 0ee8f1aded1..cc442bc4bbd 100644
--- a/tests/kafkatest/version.py
+++ b/tests/kafkatest/version.py
@@ -110,7 +110,7 @@ def get_version(node=None):
         return DEV_BRANCH
 
 DEV_BRANCH = KafkaVersion("dev")
-DEV_VERSION = KafkaVersion("4.1.0-SNAPSHOT")
+DEV_VERSION = KafkaVersion("4.2.0-SNAPSHOT")
 
 LATEST_STABLE_TRANSACTION_VERSION = 2
 # This should match the LATEST_PRODUCTION version defined in MetadataVersion.java