diff --git a/default.xml b/default.xml
index 2b4b7ae..2c6f578 100644
--- a/default.xml
+++ b/default.xml
@@ -14,7 +14,7 @@
   <project name="musllibc.git" path="projects/musllibc" revision="9798aedbc3ee5fa3c1d7f788e9312df9203e7b0b" upstream="sel4" dest-branch="sel4"/>
   <project name="nanopb" path="tools/nanopb" remote="nanopb" revision="1466e6f953835b191a7f5acf0c06c941d4cd33d9" upstream="master" dest-branch="refs/tags/0.4.3"/>
   <project name="opensbi" path="tools/opensbi" remote="opensbi" revision="234ed8e427f4d92903123199f6590d144e0d9351" upstream="refs/tags/v0.9" dest-branch="refs/tags/v0.9"/>
-  <project name="seL4.git" path="kernel" revision="3534865d334979737971e22fbf1bf777c6dd4b06" upstream="master" dest-branch="master"/>
+  <project name="seL4.git" path="kernel" revision="421477565d2910ffe2a37a81260b974c1c355a6a" upstream="master" dest-branch="master"/>
   <project name="seL4_libs.git" path="projects/seL4_libs" revision="f8aabb6d637c43b07af97b8d36224adb5532c247" upstream="master" dest-branch="master"/>
   <project name="seL4_tools.git" path="tools/seL4" revision="41cf8d75a3991d3437dcf552adcbe2481d9f00b0" upstream="master" dest-branch="master">
     <linkfile src="cmake-tool/init-build.sh" dest="init-build.sh"/>