diff --git a/vault-github/run.sh b/vault-github/run.sh
index 39d1e8b..3e94817 100644
--- a/vault-github/run.sh
+++ b/vault-github/run.sh
@@ -9,11 +9,11 @@ fetch() {
   dest="$1"
   url="$2"
   if command -v curl; then
-    curl -sSL --fail "${url}" -o "${dest}"
+    curl -sSL --fail "$url" -o "$dest"
   elif command -v wget; then
-    wget -O "${dest}" "${url}"
+    wget -O "$dest" "$url"
   elif command -v busybox; then
-    busybox wget -O "${dest}" "${url}"
+    busybox wget -O "$dest" "$url"
   else
     printf "curl, wget, or busybox is not installed. Please install curl or wget in your image.\n"
     exit 1