--- a/third_party/README.rnp
+++ b/third_party/README.rnp
@@ -25,16 +25,17 @@ git-hooks
 .clang-format
 .gitignore
 _config.yml
 docker.sh
 travis.sh
 vcpkg.txt
 Brewfile
 CMakeLists.txt
+CMakeSettings.json
 
 
 The following files were added to the source's root by MZLA Technologies:
 Makefile.in
 moz.build
 module.ver
 rnp.symbols
 

--- a/third_party/update_rnp.sh
+++ b/third_party/update_rnp.sh
@@ -43,17 +43,17 @@ LATEST_VERSION=$($THIRDROC latest_versio
 REVISION=$(git -C "${RNPgit}" rev-parse --verify HEAD)
 TIMESTAMP=$(git -C "${RNPgit}" show -s --format=%ct)
 
 BUGREPORT="https://bugzilla.mozilla.org/enter_bug.cgi?product=Thunderbird"
 
 # Cleanup rnp checkout
 rm -rf ${RNPgit}/{.git,.github,.cirrus.yml,.clang-format,.gitignore}
 rm -rf ${RNPgit}/{_config.yml,docker.sh,ci,cmake,git-hooks,travis.sh,vcpkg.txt}
-rm -rf ${RNPgit}/{Brewfile,CMakeLists.txt}
+rm -rf ${RNPgit}/{Brewfile,CMakeLists.txt,CMakeSettings.json}
 
 # Do the switch
 rm -rf rnp
 mv "${RNPgit}" rnp
 # Build version.h/config.h.in
 $THIRDROC rnp_source_update rnp/ \
   "${LATEST_VERSION}" \
   "${REVISION}" \