diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 15bf6a69..7368776d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -7,6 +7,9 @@ Note that ``PHAB_ID=#`` and ``RB_ID=#`` correspond to associated messages in com
 Unreleased
 ----------
 
+21.9.0
+------
+
 Breaking API Changes
 ~~~~~~~~~~~~~~~~~~~~
 
diff --git a/README.md b/README.md
index 2cbff24a..8baf4986 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Scrooge
 
-[![Build Status](https://github.com/twitter/scrooge/workflows/continuous%20integration/badge.svg?branch=develop)](https://github.com/twitter/scrooge/actions?query=workflow%3A%22continuous+integration%22+branch%3Adevelop)
+[![Build Status](https://github.com/twitter/scrooge/workflows/continuous%20integration/badge.svg?branch=release)](https://github.com/twitter/scrooge/actions?query=workflow%3A%22continuous+integration%22+branch%3Arelease)
 [![Codecov](https://codecov.io/gh/twitter/scrooge/branch/develop/graph/badge.svg)](https://codecov.io/gh/twitter/scrooge)
 [![Project status](https://img.shields.io/badge/status-active-brightgreen.svg)](#status)
 [![Gitter](https://badges.gitter.im/twitter/finagle.svg)](https://gitter.im/twitter/finagle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
diff --git a/build.sbt b/build.sbt
index 70799a6b..3a7e4bd2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -9,7 +9,7 @@ Global / excludeLintKeys += scalacOptions
 // 'git checkout develop; sbt publishLocal' to publish SNAPSHOT versions of these projects.
 
 // All Twitter library releases are date versioned as YY.MM.patch
-val releaseVersion = "21.9.0-SNAPSHOT"
+val releaseVersion = "21.9.0"
 
 lazy val versions = new {
   val slf4j = "1.7.30"
diff --git a/demos/scrooge-maven-demo/pom.xml b/demos/scrooge-maven-demo/pom.xml
index bd245830..b151b380 100644
--- a/demos/scrooge-maven-demo/pom.xml
+++ b/demos/scrooge-maven-demo/pom.xml
@@ -24,28 +24,28 @@
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>scrooge-core_2.12</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>finagle-thrift_2.12</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <!--#dependencies-->
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>util-core_2.12</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>util-codec_2.12</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>finagle-core_2.12</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
@@ -129,7 +129,7 @@
       <plugin>
         <groupId>com.twitter</groupId>
         <artifactId>scrooge-maven-plugin</artifactId>
-        <version>21.9.0-SNAPSHOT</version>
+        <version>21.9.0</version>
         <configuration>
           <thriftNamespaceMappings>
             <thriftNamespaceMapping>
diff --git a/doc/src/sphinx/SBTPlugin.rst b/doc/src/sphinx/SBTPlugin.rst
index 17dfc993..87ceb251 100644
--- a/doc/src/sphinx/SBTPlugin.rst
+++ b/doc/src/sphinx/SBTPlugin.rst
@@ -13,7 +13,7 @@ To use the scrooge-sbt-plugin, add the following lines to your
 
 ::
 
-    addSbtPlugin("com.twitter" % "scrooge-sbt-plugin" % "21.8.0")
+    addSbtPlugin("com.twitter" % "scrooge-sbt-plugin" % "21.9.0")
 
 Incorporating this line makes the Scrooge plugin available for use by SBT.
 Thrift files added to your project can now have code generated for them. By
@@ -41,8 +41,8 @@ An example using a `build.sbt` file.
         name := "Scrooge Demo",
         libraryDependencies ++= Seq(
           "org.apache.thrift" % "libthrift" % "0.10.0",
-          "com.twitter" %% "scrooge-core" % "21.8.0",
-          "com.twitter" %% "finagle-thrift" % "21.8.0",
+          "com.twitter" %% "scrooge-core" % "21.9.0",
+          "com.twitter" %% "finagle-thrift" % "21.9.0",
           scalaTest % Test
         )
       )
@@ -101,7 +101,7 @@ have Scrooge generate Java code.
         scroogeLanguages in Compile := Seq("java"),
         libraryDependencies ++= Seq(
           "org.apache.thrift" % "libthrift" % "0.10.0",
-          "com.twitter" %% "scrooge-core" % "21.8.0",
-          "com.twitter" %% "finagle-thrift" % "21.8.0",
+          "com.twitter" %% "scrooge-core" % "21.9.0",
+          "com.twitter" %% "finagle-thrift" % "21.9.0",
           scalaTest % Test
         )
diff --git a/doc/src/sphinx/index.rst b/doc/src/sphinx/index.rst
index f12d53ab..27962d7d 100644
--- a/doc/src/sphinx/index.rst
+++ b/doc/src/sphinx/index.rst
@@ -45,14 +45,14 @@ Maven users need to add the following to the pom.xml file:
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>scrooge-core_2.12</artifactId>
-      <version>21.8.0</version>
+      <version>21.9.0</version>
     </dependency>
 
 SBT users need this:
 
 ::
 
-    val scroogeCore = "com.twitter" %% "scrooge-core" % "21.8.0"
+    val scroogeCore = "com.twitter" %% "scrooge-core" % "21.9.0"
 
 Building Scrooge
 ----------------
diff --git a/scrooge-maven-plugin/pom.xml b/scrooge-maven-plugin/pom.xml
index 521017aa..c7c36ae4 100644
--- a/scrooge-maven-plugin/pom.xml
+++ b/scrooge-maven-plugin/pom.xml
@@ -5,7 +5,7 @@
   <artifactId>scrooge-maven-plugin</artifactId>
   <packaging>maven-plugin</packaging>
   <name>scrooge-maven-plugin</name>
-  <version>21.9.0-SNAPSHOT</version>
+  <version>21.9.0</version>
   <prerequisites>
     <maven>3.0.4</maven>
   </prerequisites>
@@ -297,7 +297,7 @@
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>scrooge-generator_2.10</artifactId>
-      <version>21.9.0-SNAPSHOT</version>
+      <version>21.9.0</version>
     </dependency>
     <!-- Test Dependencies-->
     <dependency>