diff --git a/gradle.properties b/gradle.properties
index d9476c37490..dc7b29b683e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -14,7 +14,7 @@
 # limitations under the License.
 
 group=org.apache.kafka
-version=0.9.1.0-SNAPSHOT
+version=0.10.0.0-SNAPSHOT
 scalaVersion=2.10.6
 task=build
 org.gradle.jvmargs=-XX:MaxPermSize=512m -Xmx1024m -Xss2m
diff --git a/kafka-merge-pr.py b/kafka-merge-pr.py
index 01b25c7aeb0..e12410511b6 100644
--- a/kafka-merge-pr.py
+++ b/kafka-merge-pr.py
@@ -72,7 +72,7 @@ RELEASE_BRANCH_PREFIX = "0."
 
 DEV_BRANCH_NAME = "trunk"
 
-DEFAULT_FIX_VERSION = os.environ.get("DEFAULT_FIX_VERSION", "0.9.1.0")
+DEFAULT_FIX_VERSION = os.environ.get("DEFAULT_FIX_VERSION", "0.10.0.0")
 
 def get_json(url):
     try:
diff --git a/tests/kafkatest/__init__.py b/tests/kafkatest/__init__.py
index 21a774db9e4..df1a6129dbc 100644
--- a/tests/kafkatest/__init__.py
+++ b/tests/kafkatest/__init__.py
@@ -23,4 +23,4 @@
 # Instead, in trunk, the version should have a suffix of the form ".devN"
 #
 # For example, when Kafka is at version 0.9.0.0-SNAPSHOT, this should be something like "0.9.0.0.dev0"
-__version__ = '0.9.1.0.dev0'
+__version__ = '0.10.0.0.dev0'