diff --git a/.devcontainer/create_cert b/.devcontainer/create_cert
index c9464e2..3b2fd5c 100755
--- a/.devcontainer/create_cert
+++ b/.devcontainer/create_cert
@@ -29,7 +29,7 @@ extendedKeyUsage=serverAuth" > "ca.ext"
     -in "req-$CERTFILE" -out "$CERTFILE" \
     -CAcreateserial -days 356 \
     -extfile ca.ext
-  rm -f "req-$CERTFILT" "ca-$KEYFILE" ca.ext "ca-*.srl"
+  rm -f "req-$CERTFILE" "ca-$KEYFILE" ca.ext "ca-${CERTFILE%.pem}.srl"
   echo "Add ca-$CERTFILE to your browser's trusted certificates"
 fi