diff --git a/BUILD b/BUILD
index 4ca17cd38bb..81e1ad65cd1 100644
--- a/BUILD
+++ b/BUILD
@@ -242,11 +242,11 @@ config_setting(
 python_config_settings()
 
 # This should be updated along with build_handwritten.yaml
-g_stands_for = "grateful"  # @unused
+g_stands_for = "gnarly"  # @unused
 
 core_version = "41.0.0"  # @unused
 
-version = "1.64.0-dev"  # @unused
+version = "1.65.0-dev"  # @unused
 
 GPR_PUBLIC_HDRS = [
     "include/grpc/support/alloc.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a80ddd5202..c6e292b0373 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,11 +25,11 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(PACKAGE_NAME          "grpc")
-set(PACKAGE_VERSION       "1.64.0-dev")
+set(PACKAGE_VERSION       "1.65.0-dev")
 set(gRPC_CORE_VERSION     "41.0.0")
 set(gRPC_CORE_SOVERSION   "41")
-set(gRPC_CPP_VERSION      "1.64.0-dev")
-set(gRPC_CPP_SOVERSION    "1.64")
+set(gRPC_CPP_VERSION      "1.65.0-dev")
+set(gRPC_CPP_SOVERSION    "1.65")
 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 8716b6ffa4e..a62edd7fca3 100644
--- a/Makefile
+++ b/Makefile
@@ -368,7 +368,7 @@ Q = @
 endif
 
 CORE_VERSION = 41.0.0
-CPP_VERSION = 1.64.0-dev
+CPP_VERSION = 1.65.0-dev
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/_metadata.py b/_metadata.py
index 7b93f833ee6..448129f21db 100644
--- a/_metadata.py
+++ b/_metadata.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/_metadata.py.template`!!!
 
-__version__ = """1.64.0.dev0"""
+__version__ = """1.65.0.dev0"""
diff --git a/build_handwritten.yaml b/build_handwritten.yaml
index 7088bc4db5b..e9eac935968 100644
--- a/build_handwritten.yaml
+++ b/build_handwritten.yaml
@@ -14,9 +14,9 @@ settings:
   '#10': See the expand_version.py for all the quirks here
   core_version: 41.0.0
   csharp_major_version: 2
-  g_stands_for: grateful
+  g_stands_for: gnarly
   protobuf_version: 3.26.1
-  version: 1.64.0-dev
+  version: 1.65.0-dev
 configs:
   asan:
     CC: clang
diff --git a/config.m4 b/config.m4
index a9b92c2aca0..d44618c5775 100644
--- a/config.m4
+++ b/config.m4
@@ -1383,7 +1383,7 @@ if test "$PHP_GRPC" != "no"; then
     -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DGRPC_ARES=0 \
     -DGRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK=1 \
     -DGRPC_XDS_USER_AGENT_NAME_SUFFIX='"\"PHP\""' \
-    -DGRPC_XDS_USER_AGENT_VERSION_SUFFIX='"\"1.64.0dev\""')
+    -DGRPC_XDS_USER_AGENT_VERSION_SUFFIX='"\"1.65.0dev\""')
 
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/channelz)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/client_channel)
diff --git a/doc/g_stands_for.md b/doc/g_stands_for.md
index 22b7bcd7443..2557a2f352e 100644
--- a/doc/g_stands_for.md
+++ b/doc/g_stands_for.md
@@ -63,4 +63,5 @@
 - 1.61 'g' stands for ['grand'](https://github.com/grpc/grpc/tree/v1.61.x)
 - 1.62 'g' stands for ['guardian'](https://github.com/grpc/grpc/tree/v1.62.x)
 - 1.63 'g' stands for ['giggle'](https://github.com/grpc/grpc/tree/v1.63.x)
-- 1.64 'g' stands for ['grateful'](https://github.com/grpc/grpc/tree/master)
+- 1.64 'g' stands for ['grateful'](https://github.com/grpc/grpc/tree/v1.64.x)
+- 1.65 'g' stands for ['gnarly'](https://github.com/grpc/grpc/tree/master)
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index 5cdc9a2287d..94651c55feb 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -22,7 +22,7 @@
 Pod::Spec.new do |s|
   s.name     = 'gRPC-C++'
   # TODO (mxyan): use version that match gRPC version when pod is stabilized
-  version = '1.64.0-dev'
+  version = '1.65.0-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 ab6c7a53455..4e6d835dc2a 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -21,7 +21,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-Core'
-  version = '1.64.0-dev'
+  version = '1.65.0-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 1e9d53cd623..1e9bab7d451 100644
--- a/gRPC-ProtoRPC.podspec
+++ b/gRPC-ProtoRPC.podspec
@@ -21,7 +21,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-ProtoRPC'
-  version = '1.64.0-dev'
+  version = '1.65.0-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 78653a71107..b1dd23fd87b 100644
--- a/gRPC-RxLibrary.podspec
+++ b/gRPC-RxLibrary.podspec
@@ -21,7 +21,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC-RxLibrary'
-  version = '1.64.0-dev'
+  version = '1.65.0-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 bc87111af0e..b016e73b775 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -20,7 +20,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'gRPC'
-  version = '1.64.0-dev'
+  version = '1.65.0-dev'
   s.version  = version
   s.summary  = 'gRPC client library for iOS/OSX'
   s.homepage = 'https://grpc.io'
diff --git a/include/grpcpp/version_info.h b/include/grpcpp/version_info.h
index 5c2787ab227..0860a237de6 100644
--- a/include/grpcpp/version_info.h
+++ b/include/grpcpp/version_info.h
@@ -19,9 +19,9 @@
 #define GRPCPP_VERSION_INFO_H
 
 #define GRPC_CPP_VERSION_MAJOR 1
-#define GRPC_CPP_VERSION_MINOR 64
+#define GRPC_CPP_VERSION_MINOR 65
 #define GRPC_CPP_VERSION_PATCH 0
 #define GRPC_CPP_VERSION_TAG "dev"
-#define GRPC_CPP_VERSION_STRING "1.64.0-dev"
+#define GRPC_CPP_VERSION_STRING "1.65.0-dev"
 
 #endif  // GRPCPP_VERSION_INFO_H
diff --git a/package.xml b/package.xml
index 98267c82e92..e7600613939 100644
--- a/package.xml
+++ b/package.xml
@@ -13,8 +13,8 @@
  <date>2019-09-24</date>
  <time>16:06:07</time>
  <version>
-  <release>1.64.0dev</release>
-  <api>1.64.0dev</api>
+  <release>1.65.0dev</release>
+  <api>1.65.0dev</api>
  </version>
  <stability>
   <release>beta</release>
@@ -22,7 +22,7 @@
  </stability>
  <license>Apache 2.0</license>
  <notes>
-- gRPC Core 1.64.0 update
+- gRPC Core 1.65.0 update
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">
diff --git a/src/core/lib/surface/version.cc b/src/core/lib/surface/version.cc
index 152e3c14fa3..eb735f8be9d 100644
--- a/src/core/lib/surface/version.cc
+++ b/src/core/lib/surface/version.cc
@@ -24,4 +24,4 @@
 
 const char* grpc_version_string(void) { return "41.0.0"; }
 
-const char* grpc_g_stands_for(void) { return "grateful"; }
+const char* grpc_g_stands_for(void) { return "gnarly"; }
diff --git a/src/csharp/build/dependencies.props b/src/csharp/build/dependencies.props
index 64aed427859..283650bf0bf 100644
--- a/src/csharp/build/dependencies.props
+++ b/src/csharp/build/dependencies.props
@@ -1,7 +1,7 @@
 <!-- This file is generated -->
 <Project>
   <PropertyGroup>
-    <GrpcCsharpVersion>2.64.0-dev</GrpcCsharpVersion>
+    <GrpcCsharpVersion>2.65.0-dev</GrpcCsharpVersion>
     <GoogleProtobufVersion>3.26.1</GoogleProtobufVersion>
   </PropertyGroup>
 </Project>
diff --git a/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec
index 10c1b8dac46..e05420911b5 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 = '1.64.0-dev'
+  v = '1.65.0-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 83da675c87e..10255961d05 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 = '1.64.0-dev'
+  v = '1.65.0-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 f84a02f0a65..c3e2f050573 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 @"1.64.0-dev"
+#define GRPC_OBJC_VERSION_STRING @"1.65.0-dev"
diff --git a/src/objective-c/tests/version.h b/src/objective-c/tests/version.h
index 7eff109444b..e806a559f9e 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 @"1.64.0-dev"
+#define GRPC_OBJC_VERSION_STRING @"1.65.0-dev"
 #define GRPC_C_VERSION_STRING @"41.0.0"
diff --git a/src/php/composer.json b/src/php/composer.json
index be88a483e61..fc2d89bacc6 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": "1.64.0",
+  "version": "1.65.0",
   "require": {
     "php": ">=7.0.0",
     "google/protobuf": "^v3.3.0"
diff --git a/src/php/ext/grpc/version.h b/src/php/ext/grpc/version.h
index 727a431e042..1198590fce8 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 "1.64.0dev"
+#define PHP_GRPC_VERSION "1.65.0dev"
 
 #endif /* VERSION_H */
diff --git a/src/python/grpcio/grpc/_grpcio_metadata.py b/src/python/grpcio/grpc/_grpcio_metadata.py
index 0480a754911..76c35c1f7e8 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__ = """1.64.0.dev0"""
+__version__ = """1.65.0.dev0"""
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 95824107433..04a5cfab351 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_admin/grpc_version.py b/src/python/grpcio_admin/grpc_version.py
index 54c05b30411..56ee7509fe3 100644
--- a/src/python/grpcio_admin/grpc_version.py
+++ b/src/python/grpcio_admin/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_admin/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_channelz/grpc_version.py b/src/python/grpcio_channelz/grpc_version.py
index ca8ef29232e..86365f4999b 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_csds/grpc_version.py b/src/python/grpcio_csds/grpc_version.py
index b1c11a9989c..18065fb541f 100644
--- a/src/python/grpcio_csds/grpc_version.py
+++ b/src/python/grpcio_csds/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_csds/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
index 57ce26179a5..c7ba0bb48c0 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_observability/grpc_version.py b/src/python/grpcio_observability/grpc_version.py
index f5c494f3aa9..fe35dea3396 100644
--- a/src/python/grpcio_observability/grpc_version.py
+++ b/src/python/grpcio_observability/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_observability/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_reflection/grpc_version.py b/src/python/grpcio_reflection/grpc_version.py
index 806e04c8dca..87faf2e5b6c 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_status/grpc_version.py b/src/python/grpcio_status/grpc_version.py
index 9879e05713a..81683b8dcbe 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_testing/grpc_version.py b/src/python/grpcio_testing/grpc_version.py
index 8ff7fa7a8b2..f8f21a864b2 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/python/grpcio_tests/grpc_version.py b/src/python/grpcio_tests/grpc_version.py
index 913363fa97d..0e4f3b44a1d 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 = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 870c2067495..73860d15afb 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 = '1.64.0.dev'
+  VERSION = '1.65.0.dev'
 end
diff --git a/src/ruby/nativedebug/version.rb b/src/ruby/nativedebug/version.rb
index afb9782b866..a82d2ce2788 100644
--- a/src/ruby/nativedebug/version.rb
+++ b/src/ruby/nativedebug/version.rb
@@ -14,6 +14,6 @@
 
 module GRPC
   module NativeDebug
-    VERSION = '1.64.0.dev'
+    VERSION = '1.65.0.dev'
   end
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index 5ae520766aa..3d5fddb60d1 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -14,6 +14,6 @@
 
 module GRPC
   module Tools
-    VERSION = '1.64.0.dev'
+    VERSION = '1.65.0.dev'
   end
 end
diff --git a/tools/distrib/python/grpc_version.py b/tools/distrib/python/grpc_version.py
index 65b948044a1..867c46e3c86 100644
--- a/tools/distrib/python/grpc_version.py
+++ b/tools/distrib/python/grpc_version.py
@@ -14,5 +14,5 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
 PROTOBUF_VERSION = '3.26.1'
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_tools/grpc_version.py
index cb39b812748..7f98c77d05c 100644
--- a/tools/distrib/python/grpcio_tools/grpc_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_tools/grpc_version.py
@@ -14,4 +14,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_tools/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index ec0d2c3bbb2..e343f013c38 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -14,5 +14,5 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
 PROTOBUF_VERSION = '3.26.1'
diff --git a/tools/distrib/python/xds_protos/grpc_version.py b/tools/distrib/python/xds_protos/grpc_version.py
index d79ffb80856..6c029a2f261 100644
--- a/tools/distrib/python/xds_protos/grpc_version.py
+++ b/tools/distrib/python/xds_protos/grpc_version.py
@@ -14,5 +14,5 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION = '1.64.0.dev0'
+VERSION = '1.65.0.dev0'
 PROTOBUF_VERSION = '3.26.1'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 6e0f4316174..6a50207e16d 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         = 1.64.0-dev
+PROJECT_NUMBER         = 1.65.0-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 fa81c90a05b..8dd3bb12622 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         = 1.64.0-dev
+PROJECT_NUMBER         = 1.65.0-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 1477af55865..db4efd59b92 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         = 1.64.0-dev
+PROJECT_NUMBER         = 1.65.0-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 45b47fa0f72..ee148b19cb2 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         = 1.64.0-dev
+PROJECT_NUMBER         = 1.65.0-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.php b/tools/doxygen/Doxyfile.php
index e5aa67b6f3d..7fcb47f12ec 100644
--- a/tools/doxygen/Doxyfile.php
+++ b/tools/doxygen/Doxyfile.php
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC PHP"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.64.0-dev
+PROJECT_NUMBER         = 1.65.0-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