diff --git a/CHANGELOG.md b/CHANGELOG.md
index 763e38bf..dcdd4577 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.0.0](https://www.github.com/googleapis/java-service-usage/compare/v0.2.1...v1.0.0) (2021-06-17)
+
+
+### Features
+
+* promote to 1.0.0 ([#42](https://www.github.com/googleapis/java-service-usage/issues/42)) ([50946ea](https://www.github.com/googleapis/java-service-usage/commit/50946ea457477b1dd6c1274c871ed4933a221d86))
+
 ### [0.2.1](https://www.github.com/googleapis/java-service-usage/compare/v0.2.0...v0.2.1) (2021-06-09)
 
 
diff --git a/google-cloud-service-usage-bom/pom.xml b/google-cloud-service-usage-bom/pom.xml
index fc6d345c..6480ba90 100644
--- a/google-cloud-service-usage-bom/pom.xml
+++ b/google-cloud-service-usage-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-usage-bom</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+  <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -56,27 +56,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-service-usage</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+        <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-usage-v1beta1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
+        <version>0.3.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-usage-v1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
+        <version>1.0.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-usage-v1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
+        <version>1.0.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-usage-v1beta1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
+        <version>0.3.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-service-usage/pom.xml b/google-cloud-service-usage/pom.xml
index 3b03bc68..2422f1d1 100644
--- a/google-cloud-service-usage/pom.xml
+++ b/google-cloud-service-usage/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-usage</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+  <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   <packaging>jar</packaging>
   <name>Google Service Usage</name>
   <url>https://github.com/googleapis/java-service-usage</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-usage-parent</artifactId>
-    <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+    <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-service-usage</site.installationModule>
diff --git a/grpc-google-cloud-service-usage-v1/pom.xml b/grpc-google-cloud-service-usage-v1/pom.xml
index 9ee741c6..0da000ae 100644
--- a/grpc-google-cloud-service-usage-v1/pom.xml
+++ b/grpc-google-cloud-service-usage-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-service-usage-v1</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
+  <version>1.0.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
   <name>grpc-google-cloud-service-usage-v1</name>
   <description>GRPC library for google-cloud-service-usage</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-usage-parent</artifactId>
-    <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+    <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-service-usage-v1beta1/pom.xml b/grpc-google-cloud-service-usage-v1beta1/pom.xml
index bd86517f..3e689f93 100644
--- a/grpc-google-cloud-service-usage-v1beta1/pom.xml
+++ b/grpc-google-cloud-service-usage-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-service-usage-v1beta1</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
+  <version>0.3.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
   <name>grpc-google-cloud-service-usage-v1beta1</name>
   <description>GRPC library for google-cloud-service-usage</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-usage-parent</artifactId>
-    <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+    <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 1b6f7040..7bec43aa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-usage-parent</artifactId>
   <packaging>pom</packaging>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+  <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   <name>Google Service Usage Parent</name>
   <url>https://github.com/googleapis/java-service-usage</url>
   <description>
@@ -60,27 +60,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-service-usage</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+        <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-usage-v1beta1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
+        <version>0.3.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-usage-v1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
+        <version>1.0.0</version><!-- {x-version-update:grpc-google-cloud-service-usage-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-usage-v1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
+        <version>1.0.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-usage-v1beta1</artifactId>
-        <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
+        <version>0.3.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-service-usage-v1/pom.xml b/proto-google-cloud-service-usage-v1/pom.xml
index 0f64f857..0d647955 100644
--- a/proto-google-cloud-service-usage-v1/pom.xml
+++ b/proto-google-cloud-service-usage-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-service-usage-v1</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
+  <version>1.0.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1:current} -->
   <name>proto-google-cloud-service-usage-v1</name>
   <description>Proto library for google-cloud-service-usage</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-usage-parent</artifactId>
-    <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+    <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-service-usage-v1beta1/pom.xml b/proto-google-cloud-service-usage-v1beta1/pom.xml
index 73ffe29a..d86b22e6 100644
--- a/proto-google-cloud-service-usage-v1beta1/pom.xml
+++ b/proto-google-cloud-service-usage-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-service-usage-v1beta1</artifactId>
-  <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
+  <version>0.3.0</version><!-- {x-version-update:proto-google-cloud-service-usage-v1beta1:current} -->
   <name>proto-google-cloud-service-usage-v1beta1</name>
   <description>Proto library for google-cloud-service-usage</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-usage-parent</artifactId>
-    <version>0.2.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-usage:current} -->
+    <version>1.0.0</version><!-- {x-version-update:google-cloud-service-usage:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 1db01f70..fcac5483 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,8 +1,8 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-service-usage:0.2.1:0.2.2-SNAPSHOT
-grpc-google-cloud-service-usage-v1beta1:0.2.1:0.2.2-SNAPSHOT
-grpc-google-cloud-service-usage-v1:0.2.1:0.2.2-SNAPSHOT
-proto-google-cloud-service-usage-v1:0.2.1:0.2.2-SNAPSHOT
-proto-google-cloud-service-usage-v1beta1:0.2.1:0.2.2-SNAPSHOT
+google-cloud-service-usage:1.0.0:1.0.0
+grpc-google-cloud-service-usage-v1beta1:0.3.0:0.3.0
+grpc-google-cloud-service-usage-v1:1.0.0:1.0.0
+proto-google-cloud-service-usage-v1:1.0.0:1.0.0
+proto-google-cloud-service-usage-v1beta1:0.3.0:0.3.0