diff --git a/google-cloud-api-gateway-bom/pom.xml b/google-cloud-api-gateway-bom/pom.xml
index c72032f..7ac530b 100644
--- a/google-cloud-api-gateway-bom/pom.xml
+++ b/google-cloud-api-gateway-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-api-gateway-bom</artifactId>
-  <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+  <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -56,17 +56,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-api-gateway</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-api-gateway-v1</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-api-gateway-v1</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-api-gateway/pom.xml b/google-cloud-api-gateway/pom.xml
index bb9a4d1..b566f2f 100644
--- a/google-cloud-api-gateway/pom.xml
+++ b/google-cloud-api-gateway/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-api-gateway</artifactId>
-  <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+  <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   <packaging>jar</packaging>
   <name>Google API Gateway</name>
   <url>https://github.com/googleapis/java-api-gateway</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-api-gateway-parent</artifactId>
-    <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+    <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-api-gateway</site.installationModule>
diff --git a/grpc-google-cloud-api-gateway-v1/pom.xml b/grpc-google-cloud-api-gateway-v1/pom.xml
index 9d5294a..b387696 100644
--- a/grpc-google-cloud-api-gateway-v1/pom.xml
+++ b/grpc-google-cloud-api-gateway-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-api-gateway-v1</artifactId>
-  <version>2.2.0</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
+  <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
   <name>grpc-google-cloud-api-gateway-v1</name>
   <description>GRPC library for google-cloud-api-gateway</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-api-gateway-parent</artifactId>
-    <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+    <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index c4375af..276a1b6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-api-gateway-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+  <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   <name>Google API Gateway Parent</name>
   <url>https://github.com/googleapis/java-api-gateway</url>
   <description>
@@ -60,17 +60,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-api-gateway</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-api-gateway-v1</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-api-gateway-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-api-gateway-v1</artifactId>
-        <version>2.2.0</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
+        <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-api-gateway-v1/pom.xml b/proto-google-cloud-api-gateway-v1/pom.xml
index 7ff009f..7e3ecc4 100644
--- a/proto-google-cloud-api-gateway-v1/pom.xml
+++ b/proto-google-cloud-api-gateway-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-api-gateway-v1</artifactId>
-  <version>2.2.0</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
+  <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-api-gateway-v1:current} -->
   <name>proto-google-cloud-api-gateway-v1</name>
   <description>Proto library for google-cloud-api-gateway</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-api-gateway-parent</artifactId>
-    <version>2.2.0</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
+    <version>2.2.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-api-gateway:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index ffe923a..877a13a 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-api-gateway:2.2.0:2.2.0
-grpc-google-cloud-api-gateway-v1:2.2.0:2.2.0
-proto-google-cloud-api-gateway-v1:2.2.0:2.2.0
+google-cloud-api-gateway:2.2.0:2.2.1-SNAPSHOT
+grpc-google-cloud-api-gateway-v1:2.2.0:2.2.1-SNAPSHOT
+proto-google-cloud-api-gateway-v1:2.2.0:2.2.1-SNAPSHOT