diff --git a/build/mac/download_hermetic_xcode.py b/build/mac/download_hermetic_xcode.py
index 716cac925db..a3882e06e38 100755
--- a/build/mac/download_hermetic_xcode.py
+++ b/build/mac/download_hermetic_xcode.py
@@ -21,12 +21,12 @@ def LoadPList(path):
     with open(path, 'rb') as f:
         return plistlib.load(f)
 
-# This contains binaries from Xcode 16.2, along with the macOS 15.2 SDK
-XCODE_VERSION = '16.2'
+# This contains binaries from Xcode 16.3, along with the macOS 15.4 SDK
+XCODE_VERSION = '16.3'
 HERMETIC_XCODE_BINARY = (
     DEPS_PACKAGES_INTERNAL_URL +
     '/xcode-hermetic-toolchain/xcode-hermetic-toolchain-xcode-' +
-    XCODE_VERSION + '-sdk-15.2-15.0.tar.gz')
+    XCODE_VERSION + '-sdk-15.4-15.2.tar.gz')
 
 # The toolchain will not be downloaded if the minimum OS version is not met. 19
 # is the major version number for macOS 10.15. Xcode 13.2 13C90 only runs on