diff --git a/cmake/Modules/LLVMVersion.cmake b/cmake/Modules/LLVMVersion.cmake
index 5e28283fbc1c..897dd963bd9a 100644
--- a/cmake/Modules/LLVMVersion.cmake
+++ b/cmake/Modules/LLVMVersion.cmake
@@ -1,7 +1,7 @@
 # The LLVM Version number information
 
 if(NOT DEFINED LLVM_VERSION_MAJOR)
-  set(LLVM_VERSION_MAJOR 19)
+  set(LLVM_VERSION_MAJOR 20)
 endif()
 if(NOT DEFINED LLVM_VERSION_MINOR)
   set(LLVM_VERSION_MINOR 0)
diff --git a/libcxx/include/__config b/libcxx/include/__config
index 108f700823cb..0be25a5fd226 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -27,7 +27,7 @@
 // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
 // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
 // defined to XXYYZZ.
-#  define _LIBCPP_VERSION 190000
+#  define _LIBCPP_VERSION 200000
 
 #  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
diff --git a/llvm/utils/gn/secondary/llvm/version.gni b/llvm/utils/gn/secondary/llvm/version.gni
index 7c02ed396db5..e0107cdeae76 100644
--- a/llvm/utils/gn/secondary/llvm/version.gni
+++ b/llvm/utils/gn/secondary/llvm/version.gni
@@ -1,4 +1,4 @@
-llvm_version_major = 19
+llvm_version_major = 20
 llvm_version_minor = 0
 llvm_version_patch = 0
 llvm_version = "$llvm_version_major.$llvm_version_minor.$llvm_version_patch"
diff --git a/llvm/utils/lit/lit/__init__.py b/llvm/utils/lit/lit/__init__.py
index a5a1ff66bf41..ea56d192fb39 100644
--- a/llvm/utils/lit/lit/__init__.py
+++ b/llvm/utils/lit/lit/__init__.py
@@ -2,7 +2,7 @@
 
 __author__ = "Daniel Dunbar"
 __email__ = "daniel@minormatter.com"
-__versioninfo__ = (19, 0, 0)
+__versioninfo__ = (20, 0, 0)
 __version__ = ".".join(str(v) for v in __versioninfo__) + "dev"
 
 __all__ = []