diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89a983ca4dd533002262cc2e5057687580f40c06..28bff0d23181e2d8598744e1c32cdcce00e8b4bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@
 cmake_minimum_required(VERSION 2.8)
 
 set(PACKAGE_NAME      "grpc")
-set(PACKAGE_VERSION   "1.2.0-pre1")
+set(PACKAGE_VERSION   "1.2.0-pre2")
 set(PACKAGE_STRING    "${PACKAGE_NAME} ${PACKAGE_VERSION}")
 set(PACKAGE_TARNAME   "${PACKAGE_NAME}-${PACKAGE_VERSION}")
 set(PACKAGE_BUGREPORT "https://github.com/grpc/grpc/issues/")
diff --git a/Makefile b/Makefile
index c35fe90a17f194fadb1d271a9b98f4dd46325472..331523ed7d73bfeff5eab218e37a6f84eff1877a 100644
--- a/Makefile
+++ b/Makefile
@@ -412,8 +412,8 @@ Q = @
 endif
 
 CORE_VERSION = 3.0.0-dev
-CPP_VERSION = 1.2.0-pre1
-CSHARP_VERSION = 1.2.0-pre1
+CPP_VERSION = 1.2.0-pre2
+CSHARP_VERSION = 1.2.0-pre2
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/build.yaml b/build.yaml
index c71e98c52276a37b0edbed8aa5a07d85e1b2644f..ce88586b92b8419c41996c992733077a86b67438 100644
--- a/build.yaml
+++ b/build.yaml
@@ -14,7 +14,7 @@ settings:
   '#10': See the expand_version.py for all the quirks here
   core_version: 3.0.0-dev
   g_stands_for: green
-  version: 1.2.0-pre1
+  version: 1.2.0-pre2
 filegroups:
 - name: census
   public_headers:
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 8b67a5dcdd21b06c84edeb9ccab00a01dc51a65f..6e65f681b86be086e8059dc12891e9ffb4f055df 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -37,7 +37,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-Core'
-  version = '1.2.0-pre1'
+  version = '1.2.0-pre2'
   s.version  = version
   s.summary  = 'Core cross-platform gRPC library, written in C'
   s.homepage = 'http://www.grpc.io'
diff --git a/gRPC-ProtoRPC.podspec b/gRPC-ProtoRPC.podspec
index 8fbdf7ad55d597cba200421424b28fbb6a4a96dd..2b6908b8b9a99a7422611628176f10789e01d2f3 100644
--- a/gRPC-ProtoRPC.podspec
+++ b/gRPC-ProtoRPC.podspec
@@ -36,7 +36,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-ProtoRPC'
-  version = '1.2.0-pre1'
+  version = '1.2.0-pre2'
   s.version  = version
   s.summary  = 'RPC library for Protocol Buffers, based on gRPC'
   s.homepage = 'http://www.grpc.io'
diff --git a/gRPC-RxLibrary.podspec b/gRPC-RxLibrary.podspec
index e302e6482e3dedaed146bca41fdb6b78bc198b6b..7293a189ed117cba2e0446db5252bd88420f1f25 100644
--- a/gRPC-RxLibrary.podspec
+++ b/gRPC-RxLibrary.podspec
@@ -36,7 +36,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-RxLibrary'
-  version = '1.2.0-pre1'
+  version = '1.2.0-pre2'
   s.version  = version
   s.summary  = 'Reactive Extensions library for iOS/OSX.'
   s.homepage = 'http://www.grpc.io'
diff --git a/gRPC.podspec b/gRPC.podspec
index 64a6f0aba475aa5a377dac9d380d2ad803d84296..149847e993302c1a057b21366dd5f14361c36fb6 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -35,7 +35,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC'
-  version = '1.2.0-pre1'
+  version = '1.2.0-pre2'
   s.version  = version
   s.summary  = 'gRPC client library for iOS/OSX'
   s.homepage = 'http://www.grpc.io'
diff --git a/package.json b/package.json
index 588425d0e0466ed96c8ddf5cd6ec99f143610e1f..36f7d35a7e038ece61605bd0a95b2cfc3c37d016 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/package.xml b/package.xml
index 94305025b5cccd38ef45d9097f616689f409f980..7b3e6b129f971dc51a5886d4e46497cfdc6fe1df 100644
--- a/package.xml
+++ b/package.xml
@@ -13,8 +13,8 @@
  <date>2017-03-01</date>
  <time>16:06:07</time>
  <version>
-  <release>1.2.0RC1</release>
-  <api>1.2.0RC1</api>
+  <release>1.2.0RC2</release>
+  <api>1.2.0RC2</api>
  </version>
  <stability>
   <release>beta</release>
diff --git a/src/cpp/common/version_cc.cc b/src/cpp/common/version_cc.cc
index 30395fbac53147dc99ba5eae55f0d8fb00a918cd..9b30223f475aa44ad7a17c44b9cfef7ee2bc4efd 100644
--- a/src/cpp/common/version_cc.cc
+++ b/src/cpp/common/version_cc.cc
@@ -37,5 +37,5 @@
 #include <grpc++/grpc++.h>
 
 namespace grpc {
-grpc::string Version() { return "1.2.0-pre1"; }
+grpc::string Version() { return "1.2.0-pre2"; }
 }
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index d4fbdc1d56dff365515cd7dfcc562aff294a6dc1..fc0a8ba0deffb239e2547bb09bd0333b8b0b38d4 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.2.0-pre1",
+    "Grpc.Core": "1.2.0-pre2",
     "Google.Apis.Auth": "1.21.0"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core.Testing/project.json b/src/csharp/Grpc.Core.Testing/project.json
index 9d1180d054950220fb25a8d2e9c271b5f2cc9c5b..0070b74cc38899f8d6b124e5ad3f75c17d04dab6 100644
--- a/src/csharp/Grpc.Core.Testing/project.json
+++ b/src/csharp/Grpc.Core.Testing/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "title": "gRPC C# Core Testing",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2017, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.2.0-pre1"
+    "Grpc.Core": "1.2.0-pre2"
   },
   "frameworks": {
     "net45": {
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index b6e3bc5f8d2ffe8effb061448a21fa927670972f..8773183aaf04e031f50b172d6cbcaec4806e4ebf 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -53,6 +53,6 @@ namespace Grpc.Core
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "1.2.0-pre1";
+        public const string CurrentVersion = "1.2.0-pre2";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 51311010cd53aa5eefe781b3c91cb815efcfab38..0f9f1e819e7567eb0f75001809c8b408d9d95275 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "title": "gRPC C# Core",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 330002f3ad6f9279cca8f9b390a5e0ca4f5e51c5..ae3094b903d713f8f125b844e1e2c572ff57f98a 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.2.0-pre1",
+    "Grpc.Core": "1.2.0-pre2",
     "Google.Protobuf": "3.2.0"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Reflection/project.json b/src/csharp/Grpc.Reflection/project.json
index 1a77a854c2d67947e6f69ad96afa3f0a9bc61d24..8daa9e47ddb67238f71130cba95d593c9c8513e8 100644
--- a/src/csharp/Grpc.Reflection/project.json
+++ b/src/csharp/Grpc.Reflection/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "title": "gRPC C# Reflection",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2016, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.2.0-pre1",
+    "Grpc.Core": "1.2.0-pre2",
     "Google.Protobuf": "3.2.0"
   },
   "frameworks": {
diff --git a/src/csharp/build_packages_dotnetcli.bat b/src/csharp/build_packages_dotnetcli.bat
index fee896d883fdc187d3560286c3fa5e3968840f60..9e1074833fbf4e068190425603567f1ba643ffed 100755
--- a/src/csharp/build_packages_dotnetcli.bat
+++ b/src/csharp/build_packages_dotnetcli.bat
@@ -28,7 +28,7 @@
 @rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 @rem Current package versions
-set VERSION=1.2.0-pre1
+set VERSION=1.2.0-pre2
 set PROTOBUF_VERSION=3.0.0
 
 @rem Adjust the location of nuget.exe
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
index bc7350f3afc69d62c1fa97c0463455a266bd7ae4..a283dc76f178c07179be08c8854df27915a0e4a7 100755
--- a/src/csharp/build_packages_dotnetcli.sh
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -66,7 +66,7 @@ dotnet pack --configuration Release Grpc.Auth/project.json --output ../../artifa
 dotnet pack --configuration Release Grpc.HealthCheck/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.Reflection/project.json --output ../../artifacts
 
-nuget pack Grpc.nuspec -Version "1.2.0-pre1" -OutputDirectory ../../artifacts
-nuget pack Grpc.Tools.nuspec -Version "1.2.0-pre1" -OutputDirectory ../../artifacts
+nuget pack Grpc.nuspec -Version "1.2.0-pre2" -OutputDirectory ../../artifacts
+nuget pack Grpc.Tools.nuspec -Version "1.2.0-pre2" -OutputDirectory ../../artifacts
 
 (cd ../../artifacts && zip csharp_nugets_dotnetcli.zip *.nupkg)
diff --git a/src/node/health_check/package.json b/src/node/health_check/package.json
index 302f2606c6b98dff2d72ad5fc8213bc47149fa70..d03d5a4d625331ed98bc9c62ddbe274a3906396a 100644
--- a/src/node/health_check/package.json
+++ b/src/node/health_check/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-health-check",
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "author": "Google Inc.",
   "description": "Health check service for use with gRPC",
   "repository": {
@@ -15,7 +15,7 @@
     }
   ],
   "dependencies": {
-    "grpc": "^1.2.0-pre1",
+    "grpc": "^1.2.0-pre2",
     "lodash": "^3.9.3",
     "google-protobuf": "^3.0.0"
   },
diff --git a/src/node/tools/package.json b/src/node/tools/package.json
index 78071ad55af850e49c4a3c64d9d4b071649f0d4d..e3b53bcdf5456bcb96201e20ff232111e4f7f2a0 100644
--- a/src/node/tools/package.json
+++ b/src/node/tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-tools",
-  "version": "1.2.0-pre1",
+  "version": "1.2.0-pre2",
   "author": "Google Inc.",
   "description": "Tools for developing with gRPC on Node.js",
   "homepage": "http://www.grpc.io/",
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index ccad095f17d85b6e8f19d2836de8fafc712231c3..2a2f4de50229e4dd449abb6ccc9f29ff11e41bd8 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 = '1.2.0-pre1'
+  v = '1.2.0-pre2'
   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/private/version.h b/src/objective-c/GRPCClient/private/version.h
index 2d9ecc6c308b4efd35fb6d60e7b3fa4f423ac304..289a55d083b7242564243a0c1b880f2fe480f4e7 100644
--- a/src/objective-c/GRPCClient/private/version.h
+++ b/src/objective-c/GRPCClient/private/version.h
@@ -38,4 +38,4 @@
 // `tools/buildgen/generate_projects.sh`.
 
 
-#define GRPC_OBJC_VERSION_STRING @"1.2.0-pre1"
+#define GRPC_OBJC_VERSION_STRING @"1.2.0-pre2"
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 12c80fdbef3f84d1292d637faf88b39a1157b34b..ff72fde58384d4e0183c14ca88e70869e8fd6bdc 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION='1.2.0rc1'
+VERSION='1.2.0rc2'
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
index 6d7907d3778023bae537f86dc8a9f9a9e6db4d1a..6e098452a8f1488c49bc87dfa13bbc4d1268165f 100644
--- a/src/python/grpcio_health_checking/grpc_version.py
+++ b/src/python/grpcio_health_checking/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/grpc_version.py.template`!!!
 
-VERSION='1.2.0rc1'
+VERSION='1.2.0rc2'
diff --git a/src/python/grpcio_reflection/grpc_version.py b/src/python/grpcio_reflection/grpc_version.py
index 0372478401c5f859fbcc5b7a8f5ead56e00d9d7b..3fe4779e1544576f624e82d7bc7c279de71f67bb 100644
--- a/src/python/grpcio_reflection/grpc_version.py
+++ b/src/python/grpcio_reflection/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/grpc_version.py.template`!!!
 
-VERSION='1.2.0rc1'
+VERSION='1.2.0rc2'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index 5be5ecf254e9ea23c34755cd9707fb15472389ea..ca78d14ad9237be7c106ee8b55f2d814600a76ea 100644
--- a/src/python/grpcio_tests/grpc_version.py
+++ b/src/python/grpcio_tests/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_tests/grpc_version.py.template`!!!
 
-VERSION='1.2.0rc1'
+VERSION='1.2.0rc2'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index c5169e6ae3f74503dc77a83e9d4814cffada05ab..2cc0a950d029370568a55e329d375d035b87abca 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -29,5 +29,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '1.2.0.pre1'
+  VERSION = '1.2.0.pre2'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index 2970518f9162cb4f47b3767cf44f7915a8854e9b..22a2a72e4c29a1804809bbf47724e715e12904bb 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -29,6 +29,6 @@
 
 module GRPC
   module Tools
-    VERSION = '1.2.0.pre1'
+    VERSION = '1.2.0.pre2'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 72c929889bbe10c49a80daa62383864634bf873b..b784a80bf58770c8531fd2876c54904f9dc5e248 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION='1.2.0rc1'
+VERSION='1.2.0rc2'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 1588755fde69bcc3ebbce6d9d03a8ba57948b47e..7af9246beef67b895d7ea10aef04e2710f01d5e5 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         = 1.2.0-pre1
+PROJECT_NUMBER         = 1.2.0-pre2
 
 # 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 62d801054dcffc7d6d351817b07b1f68cad8adc3..5ca65127dcad02a8fa085aeb70ed44e4c7dcc864 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         = 1.2.0-pre1
+PROJECT_NUMBER         = 1.2.0-pre2
 
 # 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