diff --git a/Protobuf-C++.podspec b/Protobuf-C++.podspec
index ffcb1a744c..be42c3eac1 100644
--- a/Protobuf-C++.podspec
+++ b/Protobuf-C++.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'Protobuf-C++'
-  s.version  = '3.9.0-rc1'
+  s.version  = '3.10.0-rc1'
   s.summary  = 'Protocol Buffers v3 runtime library for C++.'
   s.homepage = 'https://github.com/google/protobuf'
   s.license  = '3-Clause BSD License'
diff --git a/Protobuf.podspec b/Protobuf.podspec
index 0caca28f71..3c82cbab47 100644
--- a/Protobuf.podspec
+++ b/Protobuf.podspec
@@ -5,7 +5,7 @@
 # dependent projects use the :git notation to refer to the library.
 Pod::Spec.new do |s|
   s.name     = 'Protobuf'
-  s.version  = '3.9.1'
+  s.version  = '3.10.0-rc1'
   s.summary  = 'Protocol Buffers v.3 runtime library for Objective-C.'
   s.homepage = 'https://github.com/protocolbuffers/protobuf'
   s.license  = '3-Clause BSD License'
diff --git a/configure.ac b/configure.ac
index 6dc48daae6..40ed7079ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ AC_PREREQ(2.59)
 # In the SVN trunk, the version should always be the next anticipated release
 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
 # the size of one file name in the dist tarfile over the 99-char limit.)
-AC_INIT([Protocol Buffers],[3.9.1],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[3.10.0-rc-1],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 
diff --git a/csharp/Google.Protobuf.Tools.nuspec b/csharp/Google.Protobuf.Tools.nuspec
index 87372b6c94..cefd9162d2 100644
--- a/csharp/Google.Protobuf.Tools.nuspec
+++ b/csharp/Google.Protobuf.Tools.nuspec
@@ -5,7 +5,7 @@
     <title>Google Protocol Buffers tools</title>
     <summary>Tools for Protocol Buffers - Google's data interchange format.</summary>
     <description>See project site for more info.</description>
-    <version>3.9.1</version>
+    <version>3.10.0-rc1</version>
     <authors>Google Inc.</authors>
     <owners>protobuf-packages</owners>
     <licenseUrl>https://github.com/protocolbuffers/protobuf/blob/master/LICENSE</licenseUrl>
diff --git a/csharp/src/Google.Protobuf/Google.Protobuf.csproj b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
index 222f0fc56c..0789959957 100644
--- a/csharp/src/Google.Protobuf/Google.Protobuf.csproj
+++ b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
@@ -4,7 +4,7 @@
     <Description>C# runtime library for Protocol Buffers - Google's data interchange format.</Description>
     <Copyright>Copyright 2015, Google Inc.</Copyright>
     <AssemblyTitle>Google Protocol Buffers</AssemblyTitle>
-    <VersionPrefix>3.9.1</VersionPrefix>
+    <VersionPrefix>3.10.0-rc1</VersionPrefix>
     <LangVersion>6</LangVersion>
     <Authors>Google Inc.</Authors>
     <TargetFrameworks>netstandard1.0;netstandard2.0;net45</TargetFrameworks>
diff --git a/java/bom/pom.xml b/java/bom/pom.xml
index 792febb7b5..4686fab218 100644
--- a/java/bom/pom.xml
+++ b/java/bom/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-bom</artifactId>
-  <version>3.9.1</version>
+  <version>3.10.0-rc-1</version>
   <packaging>pom</packaging>
 
   <name>Protocol Buffers [BOM]</name>
diff --git a/java/pom.xml b/java/pom.xml
index 246aa47566..4fe9ad98cc 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-parent</artifactId>
-  <version>3.9.1</version>
+  <version>3.10.0-rc-1</version>
   <packaging>pom</packaging>
 
   <name>Protocol Buffers [Parent]</name>
diff --git a/js/package.json b/js/package.json
index 37dfe67e3f..dded7164e9 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "google-protobuf",
-  "version": "3.9.1",
+  "version": "3.10.0-rc.1",
   "description": "Protocol Buffers for JavaScript",
   "main": "google-protobuf.js",
   "files": [
diff --git a/php/ext/google/protobuf/package.xml b/php/ext/google/protobuf/package.xml
index 5430bc9703..23273e72f3 100644
--- a/php/ext/google/protobuf/package.xml
+++ b/php/ext/google/protobuf/package.xml
@@ -10,15 +10,15 @@
   <email>protobuf-opensource@google.com</email>
   <active>yes</active>
  </lead>
- <date>2019-08-02</date>
- <time>15:59:08</time>
+ <date>2019-09-04</date>
+ <time>13:24:25</time>
  <version>
-  <release>3.9.1</release>
-  <api>3.9.1</api>
+  <release>3.10.0RC1</release>
+  <api>3.10.0</api>
  </version>
  <stability>
-  <release>stable</release>
-  <api>stable</api>
+  <release>beta</release>
+  <api>beta</api>
  </stability>
  <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
  <notes>GA release.</notes>
@@ -389,5 +389,19 @@ G  A release.
    <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
    <notes>GA release.</notes>
   </release>
+  <release>
+   <version>
+    <release>3.10.0RC1</release>
+    <api>3.10.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2019-09-04</date>
+   <time>13:24:25</time>
+   <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
+   <notes>GA release.</notes>
+  </release>
  </changelog>
 </package>
diff --git a/php/ext/google/protobuf/protobuf.h b/php/ext/google/protobuf/protobuf.h
index a4219d0c43..9e67b224f2 100644
--- a/php/ext/google/protobuf/protobuf.h
+++ b/php/ext/google/protobuf/protobuf.h
@@ -37,7 +37,7 @@
 #include "upb.h"
 
 #define PHP_PROTOBUF_EXTNAME "protobuf"
-#define PHP_PROTOBUF_VERSION "3.9.1"
+#define PHP_PROTOBUF_VERSION "3.10.0RC1"
 
 #define MAX_LENGTH_OF_INT64 20
 #define SIZEOF_INT64 8
diff --git a/protoc-artifacts/pom.xml b/protoc-artifacts/pom.xml
index 99c6a64494..84ef078651 100644
--- a/protoc-artifacts/pom.xml
+++ b/protoc-artifacts/pom.xml
@@ -8,7 +8,7 @@
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protoc</artifactId>
-  <version>3.9.1</version>
+  <version>3.10.0-rc-1</version>
   <packaging>pom</packaging>
   <name>Protobuf Compiler</name>
   <description>
diff --git a/python/google/protobuf/__init__.py b/python/google/protobuf/__init__.py
index d75ab244da..640a5d01ac 100755
--- a/python/google/protobuf/__init__.py
+++ b/python/google/protobuf/__init__.py
@@ -30,7 +30,7 @@
 
 # Copyright 2007 Google Inc. All Rights Reserved.
 
-__version__ = '3.9.1'
+__version__ = '3.10.0rc1'
 
 if __name__ != '__main__':
   try:
diff --git a/ruby/google-protobuf.gemspec b/ruby/google-protobuf.gemspec
index 95c2c89164..7114d4baf5 100644
--- a/ruby/google-protobuf.gemspec
+++ b/ruby/google-protobuf.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = "google-protobuf"
-  s.version     = "3.9.1"
+  s.version     = "3.10.0.rc.1"
   git_tag       = "v#{s.version.to_s.sub('.rc.', '-rc')}" # Converts X.Y.Z.rc.N to vX.Y.Z-rcN, used for the git tag
   s.licenses    = ["BSD-3-Clause"]
   s.summary     = "Protocol Buffers"
diff --git a/src/Makefile.am b/src/Makefile.am
index a06f298356..9f33a44395 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -18,7 +18,7 @@ else
 PTHREAD_DEF =
 endif
 
-PROTOBUF_VERSION = 20:1:0
+PROTOBUF_VERSION = 21:0:0
 
 if GCC
 # Turn on all warnings except for sign comparison (we ignore sign comparison
diff --git a/src/google/protobuf/any.pb.h b/src/google/protobuf/any.pb.h
index d85bb6c436..04b7e9d128 100644
--- a/src/google/protobuf/any.pb.h
+++ b/src/google/protobuf/any.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/api.pb.h b/src/google/protobuf/api.pb.h
index 4ced2978c9..ed4043ea6c 100644
--- a/src/google/protobuf/api.pb.h
+++ b/src/google/protobuf/api.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/compiler/plugin.pb.h b/src/google/protobuf/compiler/plugin.pb.h
index e35ce26542..94971ff986 100644
--- a/src/google/protobuf/compiler/plugin.pb.h
+++ b/src/google/protobuf/compiler/plugin.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/descriptor.pb.h b/src/google/protobuf/descriptor.pb.h
index 8776c68e9a..81342ccea2 100644
--- a/src/google/protobuf/descriptor.pb.h
+++ b/src/google/protobuf/descriptor.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/duration.pb.h b/src/google/protobuf/duration.pb.h
index 414b4284a3..5cc32bb763 100644
--- a/src/google/protobuf/duration.pb.h
+++ b/src/google/protobuf/duration.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/empty.pb.h b/src/google/protobuf/empty.pb.h
index 055b0763f9..fe637e4462 100644
--- a/src/google/protobuf/empty.pb.h
+++ b/src/google/protobuf/empty.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/field_mask.pb.h b/src/google/protobuf/field_mask.pb.h
index ac0e2c229e..ecaba1479f 100644
--- a/src/google/protobuf/field_mask.pb.h
+++ b/src/google/protobuf/field_mask.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/port_def.inc b/src/google/protobuf/port_def.inc
index 766b3bb27a..1ac28bf9ce 100644
--- a/src/google/protobuf/port_def.inc
+++ b/src/google/protobuf/port_def.inc
@@ -288,14 +288,14 @@
 
 // Shared google3/opensource definitions. //////////////////////////////////////
 
-#define PROTOBUF_VERSION 3009001
-#define PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC 3009000
-#define PROTOBUF_MIN_PROTOC_VERSION 3009000
+#define PROTOBUF_VERSION 30010000
+#define PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC 30010000
+#define PROTOBUF_MIN_PROTOC_VERSION 30010000
 #define PROTOBUF_VERSION_SUFFIX ""
 
 // The minimum library version which works with the current version of the
 // headers.
-#define GOOGLE_PROTOBUF_MIN_LIBRARY_VERSION 3009000
+#define GOOGLE_PROTOBUF_MIN_LIBRARY_VERSION 30010000
 
 #if defined(GOOGLE_PROTOBUF_NO_RTTI) && GOOGLE_PROTOBUF_NO_RTTI
 #define PROTOBUF_RTTI 0
diff --git a/src/google/protobuf/source_context.pb.h b/src/google/protobuf/source_context.pb.h
index 7ef7613fc3..e17c5b63b9 100644
--- a/src/google/protobuf/source_context.pb.h
+++ b/src/google/protobuf/source_context.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/struct.pb.h b/src/google/protobuf/struct.pb.h
index 244bbbe677..505e9e8ff3 100644
--- a/src/google/protobuf/struct.pb.h
+++ b/src/google/protobuf/struct.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/stubs/common.h b/src/google/protobuf/stubs/common.h
index 3515cba917..c78a192ff8 100644
--- a/src/google/protobuf/stubs/common.h
+++ b/src/google/protobuf/stubs/common.h
@@ -81,7 +81,7 @@ namespace internal {
 
 // The current version, represented as a single integer to make comparison
 // easier:  major * 10^6 + minor * 10^3 + micro
-#define GOOGLE_PROTOBUF_VERSION 3009001
+#define GOOGLE_PROTOBUF_VERSION 30010000
 
 // A suffix string for alpha, beta or rc releases. Empty for stable releases.
 #define GOOGLE_PROTOBUF_VERSION_SUFFIX ""
@@ -89,15 +89,15 @@ namespace internal {
 // The minimum header version which works with the current version of
 // the library.  This constant should only be used by protoc's C++ code
 // generator.
-static const int kMinHeaderVersionForLibrary = 3009000;
+static const int kMinHeaderVersionForLibrary = 30010000;
 
 // The minimum protoc version which works with the current version of the
 // headers.
-#define GOOGLE_PROTOBUF_MIN_PROTOC_VERSION 3009000
+#define GOOGLE_PROTOBUF_MIN_PROTOC_VERSION 30010000
 
 // The minimum header version which works with the current version of
 // protoc.  This constant should only be used in VerifyVersion().
-static const int kMinHeaderVersionForProtoc = 3009000;
+static const int kMinHeaderVersionForProtoc = 30010000;
 
 // Verifies that the headers and libraries are compatible.  Use the macro
 // below to call this.
diff --git a/src/google/protobuf/timestamp.pb.h b/src/google/protobuf/timestamp.pb.h
index dda0fc1c66..6172eb4f44 100644
--- a/src/google/protobuf/timestamp.pb.h
+++ b/src/google/protobuf/timestamp.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/type.pb.h b/src/google/protobuf/type.pb.h
index 88feaadfc1..2431969e34 100644
--- a/src/google/protobuf/type.pb.h
+++ b/src/google/protobuf/type.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/wrappers.pb.h b/src/google/protobuf/wrappers.pb.h
index a28a7b4e57..4172a8cbbe 100644
--- a/src/google/protobuf/wrappers.pb.h
+++ b/src/google/protobuf/wrappers.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3009000
+#if PROTOBUF_VERSION < 30010000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3009001 < PROTOBUF_MIN_PROTOC_VERSION
+#if 30010000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.