diff --git a/.github/workflows/reusable-integrity.yml b/.github/workflows/reusable-integrity.yml
index 78f5056..37af1e7 100644
--- a/.github/workflows/reusable-integrity.yml
+++ b/.github/workflows/reusable-integrity.yml
@@ -50,7 +50,7 @@ jobs:
             run: |
                 ! git ls-tree -r -t -z --name-only HEAD \
                     | xargs --null --max-args=1 -- basename \
-                    | grep --perl-regexp '[^-.0-9A-Z_a-z]'
+                    | grep --perl-regexp '[^-.0-9A-Z_a-z]|\.\.'
         -
             name: "Check file permissions"
             run: |