diff --git a/android-interop-testing/app/build.gradle b/android-interop-testing/app/build.gradle
index 8bc8ccc451..ca5eebc78d 100644
--- a/android-interop-testing/app/build.gradle
+++ b/android-interop-testing/app/build.gradle
@@ -34,7 +34,7 @@ protobuf {
     }
     plugins {
         grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -62,10 +62,10 @@ dependencies {
     compile 'com.android.support:support-annotations:23.1.1'
     compile 'com.google.android.gms:play-services-base:7.3.0'
     // You need to build grpc-java to obtain the grpc libraries below.
-    compile 'io.grpc:grpc-protobuf-nano:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-okhttp:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-stub:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-testing:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-protobuf-nano:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-okhttp:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-stub:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-testing:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     compile 'javax.annotation:javax.annotation-api:1.2'
     compile 'junit:junit:4.12'
 
diff --git a/android/build.gradle b/android/build.gradle
index 86309689dd..cb919a1d17 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -44,8 +44,8 @@ repositories {
 }
 
 dependencies {
-    implementation 'io.grpc:grpc-core:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    testImplementation 'io.grpc:grpc-okhttp:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-core:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    testImplementation 'io.grpc:grpc-okhttp:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.robolectric:robolectric:3.7.1'
diff --git a/build.gradle b/build.gradle
index b231c3c101..c289111210 100644
--- a/build.gradle
+++ b/build.gradle
@@ -52,7 +52,7 @@ subprojects {
     idea.module.inheritOutputDirs = true
 
     group = "io.grpc"
-    version = "1.12.0-SNAPSHOT" // CURRENT_GRPC_VERSION
+    version = "1.13.0-SNAPSHOT" // CURRENT_GRPC_VERSION
 
     sourceCompatibility = 1.6
     targetCompatibility = 1.6
diff --git a/compiler/src/test/golden/TestService.java.txt b/compiler/src/test/golden/TestService.java.txt
index beaded3885..b0d7bd1945 100644
--- a/compiler/src/test/golden/TestService.java.txt
+++ b/compiler/src/test/golden/TestService.java.txt
@@ -21,7 +21,7 @@ import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
  * </pre>
  */
 @javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.12.0-SNAPSHOT)",
+    value = "by gRPC proto compiler (version 1.13.0-SNAPSHOT)",
     comments = "Source: test.proto")
 public final class TestServiceGrpc {
 
diff --git a/compiler/src/testLite/golden/TestService.java.txt b/compiler/src/testLite/golden/TestService.java.txt
index 42a6a45000..bb1e904565 100644
--- a/compiler/src/testLite/golden/TestService.java.txt
+++ b/compiler/src/testLite/golden/TestService.java.txt
@@ -21,7 +21,7 @@ import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
  * </pre>
  */
 @javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.12.0-SNAPSHOT)",
+    value = "by gRPC proto compiler (version 1.13.0-SNAPSHOT)",
     comments = "Source: test.proto")
 public final class TestServiceGrpc {
 
diff --git a/compiler/src/testNano/golden/TestService.java.txt b/compiler/src/testNano/golden/TestService.java.txt
index 95996458cd..6672520d82 100644
--- a/compiler/src/testNano/golden/TestService.java.txt
+++ b/compiler/src/testNano/golden/TestService.java.txt
@@ -23,7 +23,7 @@ import java.io.IOException;
  * </pre>
  */
 @javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.12.0-SNAPSHOT)",
+    value = "by gRPC proto compiler (version 1.13.0-SNAPSHOT)",
     comments = "Source: test.proto")
 public final class TestServiceGrpc {
 
diff --git a/core/src/main/java/io/grpc/internal/GrpcUtil.java b/core/src/main/java/io/grpc/internal/GrpcUtil.java
index e986586277..9ba9c51d55 100644
--- a/core/src/main/java/io/grpc/internal/GrpcUtil.java
+++ b/core/src/main/java/io/grpc/internal/GrpcUtil.java
@@ -199,7 +199,7 @@ public final class GrpcUtil {
 
   public static final Splitter ACCEPT_ENCODING_SPLITTER = Splitter.on(',').trimResults();
 
-  private static final String IMPLEMENTATION_VERSION = "1.12.0-SNAPSHOT"; // CURRENT_GRPC_VERSION
+  private static final String IMPLEMENTATION_VERSION = "1.13.0-SNAPSHOT"; // CURRENT_GRPC_VERSION
 
   /**
    * The default delay in nanos before we send a keepalive.
diff --git a/cronet/build.gradle b/cronet/build.gradle
index 7367254028..9d40245b91 100644
--- a/cronet/build.gradle
+++ b/cronet/build.gradle
@@ -48,8 +48,8 @@ android {
 }
 
 dependencies {
-    implementation 'io.grpc:grpc-core:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    testImplementation 'io.grpc:grpc-testing:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    implementation 'io.grpc:grpc-core:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    testImplementation 'io.grpc:grpc-testing:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 
     implementation files('libs/cronet_api.jar')
     implementation files('libs/cronet_impl_common_java.jar')
diff --git a/examples/android/clientcache/app/build.gradle b/examples/android/clientcache/app/build.gradle
index f25b747e27..037df4df82 100644
--- a/examples/android/clientcache/app/build.gradle
+++ b/examples/android/clientcache/app/build.gradle
@@ -38,7 +38,7 @@ protobuf {
             artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
         }
         grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -58,12 +58,12 @@ dependencies {
     compile 'com.android.support:appcompat-v7:27.0.2'
 
     // You need to build grpc-java to obtain these libraries below.
-    compile 'io.grpc:grpc-okhttp:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-protobuf-lite:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-stub:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-okhttp:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-protobuf-lite:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-stub:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     compile 'javax.annotation:javax.annotation-api:1.2'
 
     testCompile 'junit:junit:4.12'
     testCompile 'com.google.truth:truth:0.36'
-    testCompile 'io.grpc:grpc-testing:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    testCompile 'io.grpc:grpc-testing:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 }
diff --git a/examples/android/helloworld/app/build.gradle b/examples/android/helloworld/app/build.gradle
index aeaa67987e..59a81b85ef 100644
--- a/examples/android/helloworld/app/build.gradle
+++ b/examples/android/helloworld/app/build.gradle
@@ -37,7 +37,7 @@ protobuf {
             artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
         }
         grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -57,8 +57,8 @@ dependencies {
     compile 'com.android.support:appcompat-v7:27.0.2'
 
     // You need to build grpc-java to obtain these libraries below.
-    compile 'io.grpc:grpc-okhttp:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-protobuf-lite:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-stub:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-okhttp:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-protobuf-lite:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-stub:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     compile 'javax.annotation:javax.annotation-api:1.2'
 }
diff --git a/examples/android/routeguide/app/build.gradle b/examples/android/routeguide/app/build.gradle
index e0cad1c86a..1f35385be6 100644
--- a/examples/android/routeguide/app/build.gradle
+++ b/examples/android/routeguide/app/build.gradle
@@ -36,7 +36,7 @@ protobuf {
             artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
         }
         grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
@@ -56,8 +56,8 @@ dependencies {
     compile 'com.android.support:appcompat-v7:27.0.2'
 
     // You need to build grpc-java to obtain these libraries below.
-    compile 'io.grpc:grpc-okhttp:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-protobuf-lite:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
-    compile 'io.grpc:grpc-stub:1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-okhttp:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-protobuf-lite:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+    compile 'io.grpc:grpc-stub:1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
     compile 'javax.annotation:javax.annotation-api:1.2'
 }
diff --git a/examples/build.gradle b/examples/build.gradle
index 068a9029a4..c41857e864 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -28,7 +28,7 @@ repositories {
 
 // Feel free to delete the comment at the next line. It is just for safely
 // updating the version in our release process.
-def grpcVersion = '1.12.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+def grpcVersion = '1.13.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 def nettyTcNativeVersion = '2.0.7.Final'
 
 dependencies {
diff --git a/examples/pom.xml b/examples/pom.xml
index 01f17b3050..c060f27ff4 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -6,12 +6,12 @@
   <packaging>jar</packaging>
   <!-- Feel free to delete the comment at the end of these lines. It is just
        for safely updating the version in our release process. -->
-  <version>1.12.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
+  <version>1.13.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>examples</name>
   <url>http://maven.apache.org</url>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <grpc.version>1.12.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
+    <grpc.version>1.13.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <netty.tcnative.version>2.0.7.Final</netty.tcnative.version>
   </properties>
   <dependencies>