diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54b15bda..f7c0944e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## [2.0.0](https://www.github.com/googleapis/java-billing/compare/v1.2.2...v2.0.0) (2021-08-06)
+
+
+### ⚠ BREAKING CHANGES
+
+* release gapic-generator-java v2.0.0 (#485)
+
+### Features
+
+* release gapic-generator-java v2.0.0 ([#485](https://www.github.com/googleapis/java-billing/issues/485)) ([733fd5e](https://www.github.com/googleapis/java-billing/commit/733fd5e936cfee9dc26ab0de2ea8c7549a3851a6))
+
+
+### Bug Fixes
+
+* owlbot post-processor should generate README ([#1154](https://www.github.com/googleapis/java-billing/issues/1154)) ([#456](https://www.github.com/googleapis/java-billing/issues/456)) ([224ef7c](https://www.github.com/googleapis/java-billing/commit/224ef7c5fee2ae1c2bcc770436720266b61444c9)), closes [#1146](https://www.github.com/googleapis/java-billing/issues/1146) [#1147](https://www.github.com/googleapis/java-billing/issues/1147)
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v2 ([#486](https://www.github.com/googleapis/java-billing/issues/486)) ([f81ad04](https://www.github.com/googleapis/java-billing/commit/f81ad04d2c6ea5d53e5525b28eb4f04792339c89))
+
 ### [1.2.2](https://www.github.com/googleapis/java-billing/compare/v1.2.1...v1.2.2) (2021-07-05)
 
 
diff --git a/google-cloud-billing-bom/pom.xml b/google-cloud-billing-bom/pom.xml
index 84576182..68d1b60b 100644
--- a/google-cloud-billing-bom/pom.xml
+++ b/google-cloud-billing-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-billing-bom</artifactId>
-  <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+  <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -52,17 +52,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-billing</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+        <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-billing-v1</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
+        <version>2.0.0</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-billing-v1</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
+        <version>2.0.0</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-billing/pom.xml b/google-cloud-billing/pom.xml
index c3a22e10..cc26ec85 100644
--- a/google-cloud-billing/pom.xml
+++ b/google-cloud-billing/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-billing</artifactId>
-  <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+  <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Billing</name>
   <url>https://github.com/googleapis/java-billing</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-billing-parent</artifactId>
-    <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+    <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-billing</site.installationModule>
diff --git a/grpc-google-cloud-billing-v1/pom.xml b/grpc-google-cloud-billing-v1/pom.xml
index 1f320df5..5514361e 100644
--- a/grpc-google-cloud-billing-v1/pom.xml
+++ b/grpc-google-cloud-billing-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-billing-v1</artifactId>
-  <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
+  <version>2.0.0</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
   <name>grpc-google-cloud-billing-v1</name>
   <description>GRPC library for grpc-google-cloud-billing-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-billing-parent</artifactId>
-    <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+    <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 0df91e12..a4ef03a2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-billing-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+  <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   <name>Google Cloud Billing Parent</name>
   <url>https://github.com/googleapis/java-billing</url>
   <description>
@@ -61,17 +61,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-billing-v1</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
+        <version>2.0.0</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-billing-v1</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
+        <version>2.0.0</version><!-- {x-version-update:grpc-google-cloud-billing-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-billing</artifactId>
-        <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+        <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-billing-v1/pom.xml b/proto-google-cloud-billing-v1/pom.xml
index 80d0ce52..5f809d92 100644
--- a/proto-google-cloud-billing-v1/pom.xml
+++ b/proto-google-cloud-billing-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-billing-v1</artifactId>
-  <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
+  <version>2.0.0</version><!-- {x-version-update:proto-google-cloud-billing-v1:current} -->
   <name>proto-google-cloud-billing-v1beta1</name>
   <description>PROTO library for proto-google-cloud-billing-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-billing-parent</artifactId>
-    <version>1.2.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-billing:current} -->
+    <version>2.0.0</version><!-- {x-version-update:google-cloud-billing:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 65381b5c..128ecd4b 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-billing:1.2.2:1.2.3-SNAPSHOT
-grpc-google-cloud-billing-v1:1.2.2:1.2.3-SNAPSHOT
-proto-google-cloud-billing-v1:1.2.2:1.2.3-SNAPSHOT
+google-cloud-billing:2.0.0:2.0.0
+grpc-google-cloud-billing-v1:2.0.0:2.0.0
+proto-google-cloud-billing-v1:2.0.0:2.0.0