diff --git a/cargo-lock-updater b/cargo-lock-updater
index 8f5a13e..32c2ecb 100755
--- a/cargo-lock-updater
+++ b/cargo-lock-updater
@@ -1,5 +1,5 @@
 #!/usr/bin/env zsh
-for file in $(git ls-files | grep Cargo.lock); do
+for file in $(git ls-files '*Cargo.lock'); do
 	(cd "$(dirname "$file")" && cargo update -wq)
 	git add $file
 done