diff --git a/codegen/pom.xml b/codegen/pom.xml
index 25b1a2df..aa1432da 100644
--- a/codegen/pom.xml
+++ b/codegen/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1-SNAPSHOT</version>
   </parent>
 
   <artifactId>gson-codegen</artifactId>
diff --git a/extras/pom.xml b/extras/pom.xml
index 5c6fe72d..7690f813 100644
--- a/extras/pom.xml
+++ b/extras/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1-SNAPSHOT</version>
   </parent>
 
   <artifactId>gson-extras</artifactId>
diff --git a/gson/pom.xml b/gson/pom.xml
index 65358953..64d68853 100644
--- a/gson/pom.xml
+++ b/gson/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1-SNAPSHOT</version>
   </parent>
 
   <artifactId>gson</artifactId>
diff --git a/metrics/pom.xml b/metrics/pom.xml
index 537fcff6..98cf5763 100644
--- a/metrics/pom.xml
+++ b/metrics/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1-SNAPSHOT</version>
   </parent>
 
   <artifactId>gson-metrics</artifactId>
diff --git a/pom.xml b/pom.xml
index cbd9bc00..7ae736bc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
   <groupId>com.google.code.gson</groupId>
   <artifactId>gson-parent</artifactId>
-  <version>2.9.0</version>
+  <version>2.9.1-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Gson Parent</name>
@@ -35,7 +35,7 @@
     <url>https://github.com/google/gson/</url>
     <connection>scm:git:https://github.com/google/gson.git</connection>
     <developerConnection>scm:git:git@github.com:google/gson.git</developerConnection>
-    <tag>gson-parent-2.9.0</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <issueManagement>
diff --git a/proto/pom.xml b/proto/pom.xml
index e7748f8d..d4b60191 100644
--- a/proto/pom.xml
+++ b/proto/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1-SNAPSHOT</version>
   </parent>
 
   <artifactId>proto</artifactId>