diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py
index 420c106..316567b 100755
--- a/tools/clang/scripts/update.py
+++ b/tools/clang/scripts/update.py
@@ -39,8 +39,8 @@
 # These fields are written by //tools/clang/scripts/upload_revision.py, and
 # should not be changed manually.
 # They are also read by build/config/compiler/BUILD.gn.
-CLANG_REVISION = 'llvmorg-21-init-9266-g09006611'
-CLANG_SUB_REVISION = 2
+CLANG_REVISION = 'llvmorg-21-init-11777-gfd3fecfc'
+CLANG_SUB_REVISION = 1
 
 PACKAGE_VERSION = '%s-%s' % (CLANG_REVISION, CLANG_SUB_REVISION)
 RELEASE_VERSION = '21'