diff --git a/.github/workflows/Line_Endings.yml b/.github/workflows/Line_Endings.yml
index 6e0f0e1..b476595 100644
--- a/.github/workflows/Line_Endings.yml
+++ b/.github/workflows/Line_Endings.yml
@@ -25,7 +25,7 @@ jobs:
 
       - name: Check for CRLF line endings
         run: |
-          grep -rl --exclude={"*.pdf","*.png"} --exclude-dir=".git" '\r\n' > tmp.txt
+          grep -IUlr --exclude={"*.pdf","*.png"} --exclude-dir=".git" $'\r' . > tmp.txt
           nlines=$(cat tmp.txt | wc -l)
           if [ $nlines -gt 0 ]; then
             echo "matl-db repo text files with dos line endings:"