diff --git a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
index 5da8db4574a0cc..1f6879358f22bc 100644
--- a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
@@ -49,7 +49,7 @@ config("cxx_config") {
     "-Wno-covered-switch-default",
   ]
   cflags_cc = [
-    "-std=c++20",
+    "-std=c++23",
     "-nostdinc++",
   ]
   defines = [
diff --git a/llvm/utils/gn/secondary/libcxxabi/src/BUILD.gn b/llvm/utils/gn/secondary/libcxxabi/src/BUILD.gn
index c82634e2bb0648..7a923c5c854d7e 100644
--- a/llvm/utils/gn/secondary/libcxxabi/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxxabi/src/BUILD.gn
@@ -66,7 +66,7 @@ config("cxxabi_config") {
     "//libcxx/src",
   ]
   cflags_cc = [
-    "-std=c++20",
+    "-std=c++23",
     "-nostdinc++",
   ]
   defines = [