diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c605319aa51ed8b8ad0b92219d143cf2a5a7570..2f498c083f481788a222ab1a1c579c2e21f32535 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@
 cmake_minimum_required(VERSION 2.8)
 
 set(PACKAGE_NAME      "grpc")
-set(PACKAGE_VERSION   "1.0.0-pre1")
+set(PACKAGE_VERSION   "1.0.0-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 ed362f9752b47ebae7f2d27c71ef969006265ef2..ad2ff32d4198decf65def948bc2e42b99810f384 100644
--- a/Makefile
+++ b/Makefile
@@ -415,7 +415,7 @@ E = @echo
 Q = @
 endif
 
-VERSION = 1.0.0-pre1
+VERSION = 1.0.0-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 42ea3cb810b0a06fa5d9ac8e1312aef8c8d3258f..c474f66cb2c71dc14ac72535599fdc48908b30ab 100644
--- a/build.yaml
+++ b/build.yaml
@@ -7,7 +7,7 @@ settings:
   '#3': Use "-preN" suffixes to identify pre-release versions
   '#4': Per-language overrides are possible with (eg) ruby_version tag here
   '#5': See the expand_version.py for all the quirks here
-  version: 1.0.0-pre1
+  version: 1.0.0-pre2
 filegroups:
 - name: census
   public_headers:
diff --git a/package.json b/package.json
index 35410642c787fbfcc2720e66bcc5cd0ccd7e6bee..0a6a45f6b9505501a8c59767f9fd21b74f2b7eb5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-pre2",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index f0005363d56262f7ecce98339ba297eded5f7e07..dab7f542ee62e586e71a4d00348e530c714397b9 100644
--- a/src/core/lib/surface/version.c
+++ b/src/core/lib/surface/version.c
@@ -36,4 +36,4 @@
 
 #include <grpc/grpc.h>
 
-const char *grpc_version_string(void) { return "1.0.0-pre1"; }
+const char *grpc_version_string(void) { return "1.0.0-pre2"; }
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 34a4e2f1b69f26aace7552016a62e452fd443e07..979ab40e925cdec562605216658cb7a727d7f294 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-pre2",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -22,7 +22,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.0.0-pre1",
+    "Grpc.Core": "1.0.0-pre2",
     "Google.Apis.Auth": "1.11.1"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index e9f5c63372f7e8dc39af10519ada17d4658836b7..37df7ff4891af6be0adf41c5984ed36d2d6f9d04 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 = "1.0.0-pre1";
+        public const string CurrentVersion = "1.0.0-pre2";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 7a676f59a64df705fda5ca4191c09c63c0e43939..20cff429f4f61566bf58b2f2feecccdcdc86be68 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-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 906dda36247aae23228998e159d2a574da7eeba9..99da06a026d5247ea87308f8ef6f59d77ca45eac 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-pre2",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -22,7 +22,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.0.0-pre1",
+    "Grpc.Core": "1.0.0-pre2",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index ffb70addad59273dd911b6c8710f9b9a321026f3..1d40ef9eb2d242a603389a7b209caa0c7e68c0af 100644
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages.bat
@@ -30,7 +30,7 @@
 @rem Builds gRPC NuGet packages
 
 @rem Current package versions
-set VERSION=1.0.0-pre1
+set VERSION=1.0.0-pre2
 set PROTOBUF_VERSION=3.0.0-beta3
 
 @rem Packages that depend on prerelease packages (like Google.Protobuf) need to have prerelease suffix as well.
diff --git a/src/node/health_check/package.json b/src/node/health_check/package.json
index 582d560101666610aa5a779c8ab9bb1be9cd50fe..1bb946adbdf0c9accf319b913236fec026f6c122 100644
--- a/src/node/health_check/package.json
+++ b/src/node/health_check/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-health-check",
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-pre2",
   "author": "Google Inc.",
   "description": "Health check service for use with gRPC",
   "repository": {
diff --git a/src/node/tools/package.json b/src/node/tools/package.json
index 7efa0d3f402daa011d63a859eb7aabca7fe066fd..8ae51741785a176cb97f95fa2dfbd73ff854209b 100644
--- a/src/node/tools/package.json
+++ b/src/node/tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-tools",
-  "version": "1.0.0-pre1",
+  "version": "1.0.0-pre2",
   "author": "Google Inc.",
   "description": "Tools for developing with gRPC on Node.js",
   "homepage": "http://www.grpc.io/",
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index d1e2d418c32d8739d2520e7d3c68c575abed0132..c5c358cbb9dae34353d0c872bef8f3fc907e05f0 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='1.0.0rc1'
+VERSION='1.0.0rc2'
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
index 2e48fde8931ee82ce5482ba179a835fb6d86dbf2..4bc1f3ffb1859b323a86368fa5120eece61f7401 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='1.0.0rc1'
+VERSION='1.0.0rc2'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index a2387857c6c2cea8bffe8a919fb2e72685553862..16e4eb8ba7330180ef3180c233cd22666799df03 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='1.0.0rc1'
+VERSION='1.0.0rc2'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index e57fb3c14f8c7b96904edbd1a216a2b38af44c26..9e53780e447c042aa13f05678e4a3fdb69ed99df 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 = '1.0.0.pre1'
+  VERSION = '1.0.0.pre2'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index 2e318b82ad53bf221f07f55cbc564d1faeae2686..84c03b255d531436df60539ecd0b373c56acec0c 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -29,6 +29,6 @@
 
 module GRPC
   module Tools
-    VERSION = '1.0.0.pre1'
+    VERSION = '1.0.0.pre2'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 7938b3d029382a00d9634549b215f2956a79df34..91f6849e47619686c47be4faac50a1568981c5f5 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='1.0.0rc1'
+VERSION='1.0.0rc2'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index fa4b50f8f3c23cc9d06d1637741870bf0f037464..db3d27c5f6bef6a79707208dee20704612f18f18 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         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.0.0-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 1473594dfc69bd1e98d4496756b6eeef4cbe5fcf..9ff396a7cf36edb76b4dce40cbd0e3f76a659597 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         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.0.0-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.core b/tools/doxygen/Doxyfile.core
index 7619b95734307460ff4e5d911135f499762cde75..696bf4c7dc349c807c96b2658e51253c4ce16fb8 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.0.0-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.core.internal b/tools/doxygen/Doxyfile.core.internal
index 66d615664f191aefe7522fe802d89ac56eaa3c60..44c17f36157868dbd8c60b8891774675146cd499 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.0.0-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