diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09735ef1328..7e3a5fa9749 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,34 @@
 # Changelog
 
+## [1.50.0](https://www.github.com/googleapis/java-spanner/compare/v1.49.2...v1.50.0) (2020-02-28)
+
+
+### Features
+
+* add metrics to capture acquired and released sessions data ([#67](https://www.github.com/googleapis/java-spanner/issues/67)) ([94d0557](https://www.github.com/googleapis/java-spanner/commit/94d05575c37c7c7c7e9d7d3fbaea46c6d2eb6a4d))
+* add session timeout metric ([#65](https://www.github.com/googleapis/java-spanner/issues/65)) ([8d84b53](https://www.github.com/googleapis/java-spanner/commit/8d84b53efd2d237e193b68bc36345d338b0cdf20))
+* instrument Spanner client with OpenCensus metrics ([#54](https://www.github.com/googleapis/java-spanner/issues/54)) ([d9a00a8](https://www.github.com/googleapis/java-spanner/commit/d9a00a81c454ae793f9687d0e2de2bcc58d96502))
+
+
+### Bug Fixes
+
+* multiple calls to end of span ([#75](https://www.github.com/googleapis/java-spanner/issues/75)) ([3f32f51](https://www.github.com/googleapis/java-spanner/commit/3f32f51d70ceacbea02439c0f48ad057b10fb570))
+
+
+### Dependencies
+
+* update core dependencies ([#87](https://www.github.com/googleapis/java-spanner/issues/87)) ([b096651](https://www.github.com/googleapis/java-spanner/commit/b096651ddde940de9929600b31f78f965939139d))
+* update dependency com.google.cloud:google-cloud-core-bom to v1.92.5 ([56742c9](https://www.github.com/googleapis/java-spanner/commit/56742c96ff30f444e18a8bbde94ca173123385be))
+* update dependency com.google.http-client:google-http-client-bom to v1.34.2 ([#88](https://www.github.com/googleapis/java-spanner/issues/88)) ([628093d](https://www.github.com/googleapis/java-spanner/commit/628093d97877b912f6e4e706d22c2c24ba77a808))
+* update dependency com.google.protobuf:protobuf-bom to v3.11.4 ([#77](https://www.github.com/googleapis/java-spanner/issues/77)) ([fb2c683](https://www.github.com/googleapis/java-spanner/commit/fb2c683cf195e7229fe3d61a3332c32298be2625))
+* update dependency io.grpc:grpc-bom to v1.27.1 ([054b7e7](https://www.github.com/googleapis/java-spanner/commit/054b7e7091af6b61c7d2ad203688a65bcb18ed0c))
+* update opencensus.version to v0.25.0 ([#70](https://www.github.com/googleapis/java-spanner/issues/70)) ([26a3eff](https://www.github.com/googleapis/java-spanner/commit/26a3eff44c7d1f36541440aa7d29fc1d3ae8a4d7))
+
+
+### Documentation
+
+* **regen:** update sample code to set total timeout, add API client header test ([#66](https://www.github.com/googleapis/java-spanner/issues/66)) ([1178958](https://www.github.com/googleapis/java-spanner/commit/1178958eaec5aa6ea80938ad91dfb0b1a688463d))
+
 ### [1.49.2](https://www.github.com/googleapis/java-spanner/compare/v1.49.1...v1.49.2) (2020-02-06)
 
 
diff --git a/README.md b/README.md
index d034638f362..be1d3d37b25 100644
--- a/README.md
+++ b/README.md
@@ -35,16 +35,16 @@ If you are using Maven without a BOM, add this to your dependencies.
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner</artifactId>
-  <version>1.49.2</version>
+  <version>1.50.0</version>
 </dependency>
 ```
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-spanner:1.49.2'
+compile 'com.google.cloud:google-cloud-spanner:1.50.0'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "1.49.2"
+libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "1.50.0"
 ```
 [//]: # ({x-version-update-end})
 
diff --git a/google-cloud-spanner-bom/pom.xml b/google-cloud-spanner-bom/pom.xml
index 5211529cb31..94979325e48 100644
--- a/google-cloud-spanner-bom/pom.xml
+++ b/google-cloud-spanner-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner-bom</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+  <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -64,37 +64,37 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-admin-instance-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-admin-database-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+        <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-admin-instance-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-admin-database-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-spanner/pom.xml b/google-cloud-spanner/pom.xml
index 0ccd50bd01c..c1129c9a7c8 100644
--- a/google-cloud-spanner/pom.xml
+++ b/google-cloud-spanner/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+  <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Spanner</name>
   <url>https://github.com/googleapis/java-spanner</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-spanner</site.installationModule>
diff --git a/grpc-google-cloud-spanner-admin-database-v1/pom.xml b/grpc-google-cloud-spanner-admin-database-v1/pom.xml
index 6f068dcda07..692a61a8198 100644
--- a/grpc-google-cloud-spanner-admin-database-v1/pom.xml
+++ b/grpc-google-cloud-spanner-admin-database-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-spanner-admin-database-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
   <name>grpc-google-cloud-spanner-admin-database-v1</name>
   <description>GRPC library for grpc-google-cloud-spanner-admin-database-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-spanner-admin-instance-v1/pom.xml b/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
index 5f64f14ed5e..bb5e24a44b2 100644
--- a/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
+++ b/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-spanner-admin-instance-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
   <name>grpc-google-cloud-spanner-admin-instance-v1</name>
   <description>GRPC library for grpc-google-cloud-spanner-admin-instance-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-spanner-v1/pom.xml b/grpc-google-cloud-spanner-v1/pom.xml
index b58968aecb1..90ca091f66f 100644
--- a/grpc-google-cloud-spanner-v1/pom.xml
+++ b/grpc-google-cloud-spanner-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-spanner-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
   <name>grpc-google-cloud-spanner-v1</name>
   <description>GRPC library for grpc-google-cloud-spanner-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index a4e0cf33846..56e888fbfa5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+  <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   <name>Google Cloud Spanner Parent</name>
   <url>https://github.com/googleapis/java-spanner</url>
   <description>
@@ -82,37 +82,37 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-admin-instance-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-spanner-admin-database-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-admin-instance-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-spanner-admin-database-v1</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
+        <version>1.50.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner</artifactId>
-        <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+        <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-spanner-admin-database-v1/pom.xml b/proto-google-cloud-spanner-admin-database-v1/pom.xml
index 99152ba2359..966d842a5a7 100644
--- a/proto-google-cloud-spanner-admin-database-v1/pom.xml
+++ b/proto-google-cloud-spanner-admin-database-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-spanner-admin-database-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
   <name>proto-google-cloud-spanner-admin-database-v1</name>
   <description>PROTO library for proto-google-cloud-spanner-admin-database-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-spanner-admin-instance-v1/pom.xml b/proto-google-cloud-spanner-admin-instance-v1/pom.xml
index 8339341c543..28825e26ee7 100644
--- a/proto-google-cloud-spanner-admin-instance-v1/pom.xml
+++ b/proto-google-cloud-spanner-admin-instance-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-spanner-admin-instance-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
   <name>proto-google-cloud-spanner-admin-instance-v1</name>
   <description>PROTO library for proto-google-cloud-spanner-admin-instance-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-spanner-v1/pom.xml b/proto-google-cloud-spanner-v1/pom.xml
index 0bb9cbb16aa..a83ecf122d6 100644
--- a/proto-google-cloud-spanner-v1/pom.xml
+++ b/proto-google-cloud-spanner-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-spanner-v1</artifactId>
-  <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
+  <version>1.50.0</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
   <name>proto-google-cloud-spanner-v1</name>
   <description>PROTO library for proto-google-cloud-spanner-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-spanner-parent</artifactId>
-    <version>1.49.3-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner:current} -->
+    <version>1.50.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 9813198b7e7..a8838509b05 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,10 +1,10 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-cloud-spanner-admin-instance-v1:1.49.2:1.49.3-SNAPSHOT
-proto-google-cloud-spanner-v1:1.49.2:1.49.3-SNAPSHOT
-proto-google-cloud-spanner-admin-database-v1:1.49.2:1.49.3-SNAPSHOT
-grpc-google-cloud-spanner-v1:1.49.2:1.49.3-SNAPSHOT
-grpc-google-cloud-spanner-admin-instance-v1:1.49.2:1.49.3-SNAPSHOT
-grpc-google-cloud-spanner-admin-database-v1:1.49.2:1.49.3-SNAPSHOT
-google-cloud-spanner:1.49.2:1.49.3-SNAPSHOT
\ No newline at end of file
+proto-google-cloud-spanner-admin-instance-v1:1.50.0:1.50.0
+proto-google-cloud-spanner-v1:1.50.0:1.50.0
+proto-google-cloud-spanner-admin-database-v1:1.50.0:1.50.0
+grpc-google-cloud-spanner-v1:1.50.0:1.50.0
+grpc-google-cloud-spanner-admin-instance-v1:1.50.0:1.50.0
+grpc-google-cloud-spanner-admin-database-v1:1.50.0:1.50.0
+google-cloud-spanner:1.50.0:1.50.0
\ No newline at end of file