diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb03f2f7d7..eedad0dee6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [1.12.1](https://www.github.com/googleapis/java-bigtable/compare/v1.12.0...v1.12.1) (2020-05-08)
+
+
+### Bug Fixes
+
+* add missing api-client header ([#290](https://www.github.com/googleapis/java-bigtable/issues/290)) ([656684b](https://www.github.com/googleapis/java-bigtable/commit/656684b7f0fff003bb582977beb828f83da9a135))
+
 ## [1.12.0](https://www.github.com/googleapis/java-bigtable/compare/v1.11.0...v1.12.0) (2020-05-06)
 
 
diff --git a/README.md b/README.md
index 18f0fb879d..304c50117f 100644
--- a/README.md
+++ b/README.md
@@ -16,16 +16,16 @@ If you are using Maven, add this to your pom.xml file
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigtable</artifactId>
-  <version>1.12.0</version>
+  <version>1.12.1</version>
 </dependency>
 ```
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-bigtable:1.12.0'
+compile 'com.google.cloud:google-cloud-bigtable:1.12.1'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigtable" % "1.12.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigtable" % "1.12.1"
 ```
 [//]: # ({x-version-update-end})
 
diff --git a/google-cloud-bigtable-bom/pom.xml b/google-cloud-bigtable-bom/pom.xml
index 7f3d645dac..960add0dd0 100644
--- a/google-cloud-bigtable-bom/pom.xml
+++ b/google-cloud-bigtable-bom/pom.xml
@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-bom</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
     <packaging>pom</packaging>
     <parent>
         <groupId>com.google.cloud</groupId>
@@ -72,32 +72,32 @@
             <dependency>
                 <groupId>com.google.cloud</groupId>
                 <artifactId>google-cloud-bigtable</artifactId>
-                <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+                <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
             </dependency>
             <dependency>
                 <groupId>com.google.cloud</groupId>
                 <artifactId>google-cloud-bigtable-emulator</artifactId>
-                <version>0.121.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable-emulator:current} -->
+                <version>0.121.1</version><!-- {x-version-update:google-cloud-bigtable-emulator:current} -->
             </dependency>
             <dependency>
                 <groupId>com.google.api.grpc</groupId>
                 <artifactId>grpc-google-cloud-bigtable-admin-v2</artifactId>
-                <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-bigtable-admin-v2:current} -->
+                <version>1.12.1</version><!-- {x-version-update:grpc-google-cloud-bigtable-admin-v2:current} -->
             </dependency>
             <dependency>
                 <groupId>com.google.api.grpc</groupId>
                 <artifactId>grpc-google-cloud-bigtable-v2</artifactId>
-                <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-bigtable-v2:current} -->
+                <version>1.12.1</version><!-- {x-version-update:grpc-google-cloud-bigtable-v2:current} -->
             </dependency>
             <dependency>
                 <groupId>com.google.api.grpc</groupId>
                 <artifactId>proto-google-cloud-bigtable-admin-v2</artifactId>
-                <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-bigtable-admin-v2:current} -->
+                <version>1.12.1</version><!-- {x-version-update:proto-google-cloud-bigtable-admin-v2:current} -->
             </dependency>
             <dependency>
                 <groupId>com.google.api.grpc</groupId>
                 <artifactId>proto-google-cloud-bigtable-v2</artifactId>
-                <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-bigtable-v2:current} -->
+                <version>1.12.1</version><!-- {x-version-update:proto-google-cloud-bigtable-v2:current} -->
             </dependency>
         </dependencies>
     </dependencyManagement>
diff --git a/google-cloud-bigtable-deps-bom/pom.xml b/google-cloud-bigtable-deps-bom/pom.xml
index 547df1fcd6..65b12c1566 100644
--- a/google-cloud-bigtable-deps-bom/pom.xml
+++ b/google-cloud-bigtable-deps-bom/pom.xml
@@ -12,7 +12,7 @@
 
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+  <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
 
   <packaging>pom</packaging>
   <description>
diff --git a/google-cloud-bigtable-emulator/pom.xml b/google-cloud-bigtable-emulator/pom.xml
index 3bccd12ef1..751f6f7587 100644
--- a/google-cloud-bigtable-emulator/pom.xml
+++ b/google-cloud-bigtable-emulator/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <artifactId>google-cloud-bigtable-emulator</artifactId>
-  <version>0.121.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable-emulator:current} -->
+  <version>0.121.1</version><!-- {x-version-update:google-cloud-bigtable-emulator:current} -->
   <name>Google Cloud Java - Bigtable Emulator</name>
   <url>https://github.com/googleapis/java-bigtable</url>
   <description>
@@ -14,7 +14,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
   <scm>
     <connection>scm:git:git@github.com:googleapis/java-bigtable.git</connection>
@@ -80,14 +80,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/google-cloud-bigtable/pom.xml b/google-cloud-bigtable/pom.xml
index a6068544a7..a1b4a4295d 100644
--- a/google-cloud-bigtable/pom.xml
+++ b/google-cloud-bigtable/pom.xml
@@ -2,7 +2,7 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <artifactId>google-cloud-bigtable</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+  <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Bigtable</name>
   <url>https://github.com/googleapis/java-bigtable</url>
@@ -12,7 +12,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-bigtable</site.installationModule>
@@ -36,14 +36,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/grpc-google-cloud-bigtable-admin-v2/pom.xml b/grpc-google-cloud-bigtable-admin-v2/pom.xml
index cf6f09fc79..858a94b1e3 100644
--- a/grpc-google-cloud-bigtable-admin-v2/pom.xml
+++ b/grpc-google-cloud-bigtable-admin-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-bigtable-admin-v2</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-bigtable-admin-v2:current} -->
+  <version>1.12.1</version><!-- {x-version-update:grpc-google-cloud-bigtable-admin-v2:current} -->
   <name>grpc-google-cloud-bigtable-admin-v2</name>
   <description>GRPC library for grpc-google-cloud-bigtable-admin-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
 
   <dependencyManagement>
@@ -18,14 +18,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/grpc-google-cloud-bigtable-v2/pom.xml b/grpc-google-cloud-bigtable-v2/pom.xml
index a9a2d74683..048fcec584 100644
--- a/grpc-google-cloud-bigtable-v2/pom.xml
+++ b/grpc-google-cloud-bigtable-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-bigtable-v2</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-bigtable-v2:current} -->
+  <version>1.12.1</version><!-- {x-version-update:grpc-google-cloud-bigtable-v2:current} -->
   <name>grpc-google-cloud-bigtable-v2</name>
   <description>GRPC library for grpc-google-cloud-bigtable-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
 
   <dependencyManagement>
@@ -18,14 +18,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/pom.xml b/pom.xml
index ed5f59014b..732a3e38ad 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <artifactId>google-cloud-bigtable-parent</artifactId>
     <packaging>pom</packaging>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
     <name>Google Cloud Bigtable Parent</name>
     <url>https://github.com/googleapis/java-bigtable</url>
     <description>
diff --git a/proto-google-cloud-bigtable-admin-v2/pom.xml b/proto-google-cloud-bigtable-admin-v2/pom.xml
index 8b550a82e9..0a62738b2c 100644
--- a/proto-google-cloud-bigtable-admin-v2/pom.xml
+++ b/proto-google-cloud-bigtable-admin-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-bigtable-admin-v2</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-bigtable-admin-v2:current} -->
+  <version>1.12.1</version><!-- {x-version-update:proto-google-cloud-bigtable-admin-v2:current} -->
   <name>proto-google-cloud-bigtable-admin-v2</name>
   <description>PROTO library for proto-google-cloud-bigtable-admin-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
 
   <dependencyManagement>
@@ -18,14 +18,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/proto-google-cloud-bigtable-v2/pom.xml b/proto-google-cloud-bigtable-v2/pom.xml
index 466f8c44f1..40687f3814 100644
--- a/proto-google-cloud-bigtable-v2/pom.xml
+++ b/proto-google-cloud-bigtable-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-bigtable-v2</artifactId>
-  <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-bigtable-v2:current} -->
+  <version>1.12.1</version><!-- {x-version-update:proto-google-cloud-bigtable-v2:current} -->
   <name>proto-google-cloud-bigtable-v2</name>
   <description>PROTO library for proto-google-cloud-bigtable-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigtable-parent</artifactId>
-    <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+    <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
   </parent>
 
   <dependencyManagement>
@@ -18,14 +18,14 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-deps-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
-        <version>1.12.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-bigtable:current} -->
+        <version>1.12.1</version><!-- {x-version-update:google-cloud-bigtable:current} -->
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index c5a967969a..caaca75076 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-bigtable</artifactId>
-      <version>1.12.1-SNAPSHOT</version>
+      <version>1.12.1</version>
     </dependency>
   <!-- {x-version-update-end} -->
 
diff --git a/versions.txt b/versions.txt
index 46963c8822..98597f5770 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,9 +1,9 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-bigtable:1.12.0:1.12.1-SNAPSHOT
-grpc-google-cloud-bigtable-admin-v2:1.12.0:1.12.1-SNAPSHOT
-grpc-google-cloud-bigtable-v2:1.12.0:1.12.1-SNAPSHOT
-proto-google-cloud-bigtable-admin-v2:1.12.0:1.12.1-SNAPSHOT
-proto-google-cloud-bigtable-v2:1.12.0:1.12.1-SNAPSHOT
-google-cloud-bigtable-emulator:0.121.0:0.121.1-SNAPSHOT
+google-cloud-bigtable:1.12.1:1.12.1
+grpc-google-cloud-bigtable-admin-v2:1.12.1:1.12.1
+grpc-google-cloud-bigtable-v2:1.12.1:1.12.1
+proto-google-cloud-bigtable-admin-v2:1.12.1:1.12.1
+proto-google-cloud-bigtable-v2:1.12.1:1.12.1
+google-cloud-bigtable-emulator:0.121.1:0.121.1