diff --git a/CMakeLists.txt b/CMakeLists.txt
index eb77aa582c0de74659e1c3e5bbd009c52d8fac6d..bb67af6010cefbe40c760a632f714c250aab09a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,12 +25,12 @@
 cmake_minimum_required(VERSION 3.5.1)
 
 set(PACKAGE_NAME          "grpc")
-set(PACKAGE_VERSION       "1.26.0-dev")
+set(PACKAGE_VERSION       "1.27.0-dev")
 set(gRPC_CORE_VERSION     "9.0.0")
 set(gRPC_CORE_SOVERSION   "9")
-set(gRPC_CPP_VERSION      "1.26.0-dev")
+set(gRPC_CPP_VERSION      "1.27.0-dev")
 set(gRPC_CPP_SOVERSION    "1")
-set(gRPC_CSHARP_VERSION   "2.26.0-dev")
+set(gRPC_CSHARP_VERSION   "2.27.0-dev")
 set(gRPC_CSHARP_SOVERSION "2")
 set(PACKAGE_STRING        "${PACKAGE_NAME} ${PACKAGE_VERSION}")
 set(PACKAGE_TARNAME       "${PACKAGE_NAME}-${PACKAGE_VERSION}")
diff --git a/Makefile b/Makefile
index 2c59b0bd25a73bfc692c2937b6a3e8fff25cca1f..25b89a680fbd96ab12ad0fc0feb404e3a750744f 100644
--- a/Makefile
+++ b/Makefile
@@ -470,8 +470,8 @@ Q = @
 endif
 
 CORE_VERSION = 9.0.0
-CPP_VERSION = 1.26.0-dev
-CSHARP_VERSION = 2.26.0-dev
+CPP_VERSION = 1.27.0-dev
+CSHARP_VERSION = 2.27.0-dev
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index e4f5163248333a9c2d54d971dc6a90a79c7c152f..9dc4788d69fbd2682185e7313d3c2e89485f0dad 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -23,7 +23,7 @@
 Pod::Spec.new do |s|
   s.name     = 'gRPC-C++'
   # TODO (mxyan): use version that match gRPC version when pod is stabilized
-  version = '1.26.0-dev'
+  version = '1.27.0-dev'
   s.version  = version
   s.summary  = 'gRPC C++ library'
   s.homepage = 'https://grpc.io'
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 7ad1e83897858f9d441991115cacb2eb1350e09c..943387a249b0f2dcfef57afbb1ad0c001713fa0e 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -22,7 +22,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-Core'
-  version = '1.26.0-dev'
+  version = '1.27.0-dev'
   s.version  = version
   s.summary  = 'Core cross-platform gRPC library, written in C'
   s.homepage = 'https://grpc.io'
diff --git a/gRPC-ProtoRPC.podspec b/gRPC-ProtoRPC.podspec
index 43ab2557a0901bf118f332f188bc1f3006076831..d8a500b758b8dbd11e3ad4871ee50d833591fed0 100644
--- a/gRPC-ProtoRPC.podspec
+++ b/gRPC-ProtoRPC.podspec
@@ -21,7 +21,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-ProtoRPC'
-  version = '1.26.0-dev'
+  version = '1.27.0-dev'
   s.version  = version
   s.summary  = 'RPC library for Protocol Buffers, based on gRPC'
   s.homepage = 'https://grpc.io'
diff --git a/gRPC-RxLibrary.podspec b/gRPC-RxLibrary.podspec
index d90c0de70e5000ea3349ac4426d1045b50b5600b..f87ee61651deaa876a0db18388e799f79a3f73e2 100644
--- a/gRPC-RxLibrary.podspec
+++ b/gRPC-RxLibrary.podspec
@@ -21,7 +21,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-RxLibrary'
-  version = '1.26.0-dev'
+  version = '1.27.0-dev'
   s.version  = version
   s.summary  = 'Reactive Extensions library for iOS/OSX.'
   s.homepage = 'https://grpc.io'
diff --git a/gRPC.podspec b/gRPC.podspec
index 77cbda576af27f21e17f86bc64881211f4af2d15..83330550eb6cdf8a6129ec98ee6cd48c729e92fa 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -20,7 +20,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC'
-  version = '1.26.0-dev'
+  version = '1.27.0-dev'
   s.version  = version
   s.summary  = 'gRPC client library for iOS/OSX'
   s.homepage = 'https://grpc.io'
diff --git a/package.xml b/package.xml
index 61dd6f7927581c596fe2523bd71d1d6f2491f620..30c7998d38ef6eca8ed5425245a1688f6d019392 100644
--- a/package.xml
+++ b/package.xml
@@ -13,8 +13,8 @@
  <date>2019-09-24</date>
  <time>16:06:07</time>
  <version>
-  <release>1.26.0dev</release>
-  <api>1.26.0dev</api>
+  <release>1.27.0dev</release>
+  <api>1.27.0dev</api>
  </version>
  <stability>
   <release>beta</release>
@@ -22,7 +22,7 @@
  </stability>
  <license>Apache 2.0</license>
  <notes>
-- gRPC Core 1.26.0 update
+- gRPC Core 1.27.0 update
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">
diff --git a/src/core/lib/surface/version.cc b/src/core/lib/surface/version.cc
index 8f3fab197752f300f93c50beaa38b81583923116..87ecb0201c59e1abf624e40440cb5bb14bc46832 100644
--- a/src/core/lib/surface/version.cc
+++ b/src/core/lib/surface/version.cc
@@ -25,4 +25,4 @@
 
 const char* grpc_version_string(void) { return "9.0.0"; }
 
-const char* grpc_g_stands_for(void) { return "gon"; }
+const char* grpc_g_stands_for(void) { return "guantao"; }
diff --git a/src/cpp/common/version_cc.cc b/src/cpp/common/version_cc.cc
index 08c2868dac66b54ef1f0cc9338f6fd66b83120be..971a993dedcc3bad9f85697aa2c5db079564b96c 100644
--- a/src/cpp/common/version_cc.cc
+++ b/src/cpp/common/version_cc.cc
@@ -22,5 +22,5 @@
 #include <grpcpp/grpcpp.h>
 
 namespace grpc {
-grpc::string Version() { return "1.26.0-dev"; }
+grpc::string Version() { return "1.27.0-dev"; }
 }  // namespace grpc
diff --git a/src/csharp/Grpc.Core.Api/VersionInfo.cs b/src/csharp/Grpc.Core.Api/VersionInfo.cs
index a1330d62738f3cccfcc4443639bc4bb123bc045b..662cf6e7339f792a244a6e9cd948bc9371eadeb3 100644
--- a/src/csharp/Grpc.Core.Api/VersionInfo.cs
+++ b/src/csharp/Grpc.Core.Api/VersionInfo.cs
@@ -33,11 +33,11 @@ namespace Grpc.Core
         /// <summary>
         /// Current <c>AssemblyFileVersion</c> of gRPC C# assemblies
         /// </summary>
-        public const string CurrentAssemblyFileVersion = "2.26.0.0";
+        public const string CurrentAssemblyFileVersion = "2.27.0.0";
 
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "2.26.0-dev";
+        public const string CurrentVersion = "2.27.0-dev";
     }
 }
diff --git a/src/csharp/build/dependencies.props b/src/csharp/build/dependencies.props
index 20037a8982f7d2aff4e3ecd1d5aa414d2471beef..ec26941cb57f489ae0798441bd2fa1f6d62a1bbb 100644
--- a/src/csharp/build/dependencies.props
+++ b/src/csharp/build/dependencies.props
@@ -1,7 +1,7 @@
 <!-- This file is generated -->
 <Project>
   <PropertyGroup>
-    <GrpcCsharpVersion>2.26.0-dev</GrpcCsharpVersion>
+    <GrpcCsharpVersion>2.27.0-dev</GrpcCsharpVersion>
     <GoogleProtobufVersion>3.8.0</GoogleProtobufVersion>
   </PropertyGroup>
 </Project>
diff --git a/src/csharp/build_unitypackage.bat b/src/csharp/build_unitypackage.bat
index a11571907844caf6e1fa55fba8f78a694d324bf5..218452c9fd21125b362e47b57e75ff86af85542e 100644
--- a/src/csharp/build_unitypackage.bat
+++ b/src/csharp/build_unitypackage.bat
@@ -13,7 +13,7 @@
 @rem limitations under the License.
 
 @rem Current package versions
-set VERSION=2.26.0-dev
+set VERSION=2.27.0-dev
 
 @rem Adjust the location of nuget.exe
 set NUGET=C:\nuget\nuget.exe
diff --git a/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec
index 34841f5cdf480dd1723545d9cd99341e38edb03e..eee9ebbdd6fa55256a73314e8d1a2a8bf7803286 100644
--- a/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec
@@ -42,7 +42,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler-gRPCCppPlugin'
-  v = '1.26.0-dev'
+  v = '1.27.0-dev'
   s.version  = v
   s.summary  = 'The gRPC ProtoC plugin generates C++ files from .proto services.'
   s.description = <<-DESC
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index 293566f0c17ba15c275b34b42a1a32a6d65d8a56..a78bd697eac0a98893eda321ec808b9580f8d1ab 100644
--- a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
@@ -42,7 +42,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler-gRPCPlugin'
-  v = '1.26.0-dev'
+  v = '1.27.0-dev'
   s.version  = v
   s.summary  = 'The gRPC ProtoC plugin generates Objective-C files from .proto services.'
   s.description = <<-DESC
diff --git a/src/objective-c/GRPCClient/version.h b/src/objective-c/GRPCClient/version.h
index e123f1ca1671c4865f79f2ca3a594cf668c8e75a..cfb2975f20afd39faf40eeaf00a39ada0a369468 100644
--- a/src/objective-c/GRPCClient/version.h
+++ b/src/objective-c/GRPCClient/version.h
@@ -22,4 +22,4 @@
 // instead. This file can be regenerated from the template by running
 // `tools/buildgen/generate_projects.sh`.
 
-#define GRPC_OBJC_VERSION_STRING @"1.26.0-dev"
+#define GRPC_OBJC_VERSION_STRING @"1.27.0-dev"
diff --git a/src/objective-c/tests/version.h b/src/objective-c/tests/version.h
index 20a36e0f6bd05d7831b2407944efee8ab09ec570..7d71677260c4502b9d72b083519242cf1d1abb42 100644
--- a/src/objective-c/tests/version.h
+++ b/src/objective-c/tests/version.h
@@ -22,5 +22,5 @@
 // instead. This file can be regenerated from the template by running
 // `tools/buildgen/generate_projects.sh`.
 
-#define GRPC_OBJC_VERSION_STRING @"1.26.0-dev"
+#define GRPC_OBJC_VERSION_STRING @"1.27.0-dev"
 #define GRPC_C_VERSION_STRING @"9.0.0"
diff --git a/src/php/composer.json b/src/php/composer.json
index 14f893fcb7708c45cb397e23fdb08217f62480aa..659c97876fdd75cf42694d0226afa361a06f8a5d 100644
--- a/src/php/composer.json
+++ b/src/php/composer.json
@@ -2,7 +2,7 @@
   "name": "grpc/grpc-dev",
   "description": "gRPC library for PHP - for Development use only",
   "license": "Apache-2.0",
-  "version": "1.26.0",
+  "version": "1.27.0",
   "require": {
     "php": ">=5.5.0",
     "google/protobuf": "^v3.3.0"
diff --git a/src/php/ext/grpc/version.h b/src/php/ext/grpc/version.h
index 2d7e9d45bc14926eea124a1071b166d3eef36d39..83358f2a021bf77cbd583870f17d74e39312b9b3 100644
--- a/src/php/ext/grpc/version.h
+++ b/src/php/ext/grpc/version.h
@@ -20,6 +20,6 @@
 #ifndef VERSION_H
 #define VERSION_H
 
-#define PHP_GRPC_VERSION "1.26.0dev"
+#define PHP_GRPC_VERSION "1.27.0dev"
 
 #endif /* VERSION_H */
diff --git a/src/python/grpcio/grpc/_grpcio_metadata.py b/src/python/grpcio/grpc/_grpcio_metadata.py
index c07e0a58ac61e64472aaabd8381f7c643ad9b37f..726ae8c9bbd3b94f7646a8e81d351ef0a60fe494 100644
--- a/src/python/grpcio/grpc/_grpcio_metadata.py
+++ b/src/python/grpcio/grpc/_grpcio_metadata.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc/_grpcio_metadata.py.template`!!!
 
-__version__ = """1.26.0.dev0"""
+__version__ = """1.27.0.dev0"""
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 57b79d48dfaaefd755be0777d06654ca16eb757b..0aa5f5c6a15ad88f9d4cbac96e52798720da93a5 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_channelz/grpc_version.py b/src/python/grpcio_channelz/grpc_version.py
index be1e97aee6c1c3f5f05da59ad1474438ffa51c0f..f6c89379902acf24e516f0758a079ed48b0ac064 100644
--- a/src/python/grpcio_channelz/grpc_version.py
+++ b/src/python/grpcio_channelz/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_channelz/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
index 4f01713d4df10679a853ecbdcb279f079a8ddbb2..5f3534ca7d65beccf98465e3eef12f9c34996580 100644
--- a/src/python/grpcio_health_checking/grpc_version.py
+++ b/src/python/grpcio_health_checking/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_reflection/grpc_version.py b/src/python/grpcio_reflection/grpc_version.py
index 5713bdba97082fa25503d435d0c133169b97b765..4fafc404b99aea4d7039d17d90e5179e54bd6720 100644
--- a/src/python/grpcio_reflection/grpc_version.py
+++ b/src/python/grpcio_reflection/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_status/grpc_version.py b/src/python/grpcio_status/grpc_version.py
index 044f43ea3385b6178edc553250917cf5996770d8..02b6b731ff6ca03a157225f192a1651739795183 100644
--- a/src/python/grpcio_status/grpc_version.py
+++ b/src/python/grpcio_status/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_status/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_testing/grpc_version.py b/src/python/grpcio_testing/grpc_version.py
index 845c7fdf0cbbc6f91055b20d39c8c15b0a24a986..ec03a7e07ea162dd5f69b986d001f13a9aba8c59 100644
--- a/src/python/grpcio_testing/grpc_version.py
+++ b/src/python/grpcio_testing/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_testing/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index 6afc11370c97068e3d9b5516491141e61647bf10..c7733e984b1d31a318c3fd8f580f2191cbce52fb 100644
--- a/src/python/grpcio_tests/grpc_version.py
+++ b/src/python/grpcio_tests/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_tests/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 8124cc98b8702148f4f678e7fa0e65594972b3dd..c816fbb78af4228a4aadb40cb815fd6485752197 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -14,5 +14,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '1.26.0.dev'
+  VERSION = '1.27.0.dev'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index 14bdcd3a3e43407b8942594a965bb401af999ced..132042ef0520029caf01625eca2072c124b2633a 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -14,6 +14,6 @@
 
 module GRPC
   module Tools
-    VERSION = '1.26.0.dev'
+    VERSION = '1.27.0.dev'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 9bd0306dc68bbf82c833e10ed8a746fc80660bbe..e9298a1356ce9bfd82a86a9492110357d9ab88f5 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION = '1.26.0.dev0'
+VERSION = '1.27.0.dev0'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index eda8b94f491556887c65fcc7049916ba51bbbc65..2c857a106501c18518a54f1995ffa1780d17ff54 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.26.0-dev
+PROJECT_NUMBER         = 1.27.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index b07f9b2a26cf74bf206e9f5f9740bfc5ca7b9371..c0c92d9148025e457cb49fd7a1c1c6d861862282 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.26.0-dev
+PROJECT_NUMBER         = 1.27.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.objc b/tools/doxygen/Doxyfile.objc
index 4b3265e00fa0562bc6e2f3fc5f33d991fedca5b4..62dd58f860e80f570144c7b56cd5401f21ebfde6 100644
--- a/tools/doxygen/Doxyfile.objc
+++ b/tools/doxygen/Doxyfile.objc
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Objective-C"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.26.0-dev
+PROJECT_NUMBER         = 1.27.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.objc.internal b/tools/doxygen/Doxyfile.objc.internal
index 13eba5a0acfa777d3740a730cb196268580e6cfa..fc7b5aa0039d3610c45b9ce8f92c30f91e42ad93 100644
--- a/tools/doxygen/Doxyfile.objc.internal
+++ b/tools/doxygen/Doxyfile.objc.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Objective-C"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.26.0-dev
+PROJECT_NUMBER         = 1.27.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a