Master is now 1.1.0-dev.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c60531..2c0059c 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   "1.1.0-dev")
 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 992eee1..e958b14 100644
--- a/Makefile
+++ b/Makefile
@@ -415,7 +415,7 @@
 Q = @
 endif
 
-VERSION = 1.0.0-pre1
+VERSION = 1.1.0-dev
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/build.yaml b/build.yaml
index c5d92c1..071d4a8 100644
--- a/build.yaml
+++ b/build.yaml
@@ -7,7 +7,7 @@
   '#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: 1.1.0-dev
 filegroups:
 - name: census
   public_headers:
diff --git a/package.json b/package.json
index 3541064..0e229c9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "1.0.0-pre1",
+  "version": "1.1.0-dev",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/package.xml b/package.xml
index 3d7cb87..d7d10b3 100644
--- a/package.xml
+++ b/package.xml
@@ -13,8 +13,8 @@
  <date>2016-06-30</date>
  <time>16:06:07</time>
  <version>
-  <release>1.0.0</release>
-  <api>1.0.0</api>
+  <release>1.1.0</release>
+  <api>1.1.0</api>
  </version>
  <stability>
   <release>beta</release>
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index f000536..1942075 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 "1.1.0-dev"; }
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 34a4e2f..08429f1 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": "1.1.0-dev",
   "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": "1.1.0-dev",
     "Google.Apis.Auth": "1.11.1"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index e9f5c63..553aeec 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -48,11 +48,11 @@
         /// <summary>
         /// Current <c>AssemblyFileVersion</c> of gRPC C# assemblies
         /// </summary>
-        public const string CurrentAssemblyFileVersion = "1.0.0.0";
+        public const string CurrentAssemblyFileVersion = "1.1.0.0";
 
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "1.0.0-pre1";
+        public const string CurrentVersion = "1.1.0-dev";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index a07da32..4545d26 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": "1.1.0-dev",
   "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 906dda3..0e03e89 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": "1.1.0-dev",
   "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": "1.1.0-dev",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index ffb70ad..f05c024 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=1.1.0-dev
 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 b68e8b1..67f5301 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": "1.1.0-dev",
   "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 7efa0d3..e5513d7 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": "1.1.0-dev",
   "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 d1e2d41..ea38526 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='1.1.0.dev0'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index a238785..90f68a5 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='1.1.0.dev0'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index e57fb3c..6e62af9 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 = '1.1.0.dev'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index 2e318b8..e457ec0 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 = '1.1.0.dev'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 7938b3d..79c4071 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='1.1.0.dev0'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index fa4b50f..a2415e1 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -40,7 +40,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.1.0-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 1473594..945298b 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -40,7 +40,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.1.0-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.core b/tools/doxygen/Doxyfile.core
index 7619b95..e631c96 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -40,7 +40,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.1.0-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.core.internal b/tools/doxygen/Doxyfile.core.internal
index 66d6156..8233da9 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -40,7 +40,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.0.0-pre1
+PROJECT_NUMBER         = 1.1.0-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