diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77f572249..6e7444e62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [1.31.0](https://www.github.com/googleapis/google-oauth-java-client/compare/v1.30.6...v1.31.0) (2020-06-29)
+
+
+### Features
+
+* add PKCE support to AuthorizationCodeFlow ([#470](https://www.github.com/googleapis/google-oauth-java-client/issues/470)) ([13433cd](https://www.github.com/googleapis/google-oauth-java-client/commit/13433cd7dd06267fc261f0b1d4764f8e3432c824))
+
+
+### Dependencies
+
+* update google-http-client to v1.35.0 ([#466](https://www.github.com/googleapis/google-oauth-java-client/issues/466)) ([6447917](https://www.github.com/googleapis/google-oauth-java-client/commit/6447917c657a5ae4267afbab74dfdb890bbfbf28))
+* update to guava 29.0-android ([#456](https://www.github.com/googleapis/google-oauth-java-client/issues/456)) ([fc75233](https://www.github.com/googleapis/google-oauth-java-client/commit/fc752336af9cbdb9b2ed816a63d7bd3d8d1e2778))
+
 ### [1.30.6](https://www.github.com/googleapis/google-oauth-java-client/compare/v1.30.5...v1.30.6) (2020-02-24)
 
 
diff --git a/google-oauth-client-appengine/pom.xml b/google-oauth-client-appengine/pom.xml
index 220714ce5..2943d04ba 100644
--- a/google-oauth-client-appengine/pom.xml
+++ b/google-oauth-client-appengine/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-oauth-client-appengine</artifactId>
diff --git a/google-oauth-client-assembly/pom.xml b/google-oauth-client-assembly/pom.xml
index e8f8a3e3d..6c7b39d44 100644
--- a/google-oauth-client-assembly/pom.xml
+++ b/google-oauth-client-assembly/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <groupId>com.google.oauth-client</groupId>
diff --git a/google-oauth-client-bom/pom.xml b/google-oauth-client-bom/pom.xml
index 046facd15..9f11071c5 100644
--- a/google-oauth-client-bom/pom.xml
+++ b/google-oauth-client-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.oauth-client</groupId>
   <artifactId>google-oauth-client-bom</artifactId>
-  <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+  <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
   <packaging>pom</packaging>
 
   <name>Google OAuth Client Library for Java BOM</name>
@@ -63,32 +63,32 @@
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client-appengine</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client-assembly</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client-java6</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client-jetty</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.oauth-client</groupId>
         <artifactId>google-oauth-client-servlet</artifactId>
-        <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+        <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-oauth-client-java6/pom.xml b/google-oauth-client-java6/pom.xml
index 98d6e4636..444a2770d 100644
--- a/google-oauth-client-java6/pom.xml
+++ b/google-oauth-client-java6/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-oauth-client-java6</artifactId>
diff --git a/google-oauth-client-jetty/pom.xml b/google-oauth-client-jetty/pom.xml
index 7230b4147..d88d87f91 100644
--- a/google-oauth-client-jetty/pom.xml
+++ b/google-oauth-client-jetty/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-oauth-client-jetty</artifactId>
diff --git a/google-oauth-client-servlet/pom.xml b/google-oauth-client-servlet/pom.xml
index 7f2d6e0ad..2c98b37af 100644
--- a/google-oauth-client-servlet/pom.xml
+++ b/google-oauth-client-servlet/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-oauth-client-servlet</artifactId>
diff --git a/google-oauth-client/pom.xml b/google-oauth-client/pom.xml
index 5eadb7f52..d997b9cd7 100644
--- a/google-oauth-client/pom.xml
+++ b/google-oauth-client/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-oauth-client</artifactId>
diff --git a/pom.xml b/pom.xml
index 40d726726..a7a9a84ca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
   <groupId>com.google.oauth-client</groupId>
   <artifactId>google-oauth-client-parent</artifactId>
-  <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+  <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
   <packaging>pom</packaging>
   <name>Parent for the Google OAuth Client Library for Java</name>
   <description>Google OAuth Client Library for Java</description>
diff --git a/samples/dailymotion-cmdline-sample/pom.xml b/samples/dailymotion-cmdline-sample/pom.xml
index 2fdb5d8d4..ab5a5d222 100644
--- a/samples/dailymotion-cmdline-sample/pom.xml
+++ b/samples/dailymotion-cmdline-sample/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>dailymotion-simple-cmdline-sample</artifactId>
diff --git a/samples/keycloak-pkce-cmdline-sample/pom.xml b/samples/keycloak-pkce-cmdline-sample/pom.xml
index b19a662a7..4aec44616 100644
--- a/samples/keycloak-pkce-cmdline-sample/pom.xml
+++ b/samples/keycloak-pkce-cmdline-sample/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.oauth-client</groupId>
     <artifactId>google-oauth-client-parent</artifactId>
-    <version>1.30.7-SNAPSHOT</version><!-- {x-version-update:google-oauth-client:current} -->
+    <version>1.31.0</version><!-- {x-version-update:google-oauth-client:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>keycloak-pkce-cmdline-sample</artifactId>
diff --git a/versions.txt b/versions.txt
index e5724be92..3f574694f 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-google-oauth-client:1.30.6:1.30.7-SNAPSHOT
+google-oauth-client:1.31.0:1.31.0