diff --git a/deploy/jc-web-im-update.sh b/deploy/jc-web-im-update.sh
index 776283c..67522a9 100755
--- a/deploy/jc-web-im-update.sh
+++ b/deploy/jc-web-im-update.sh
@@ -54,7 +54,7 @@ while IFS= read -r asset; do
         echo "Missing referenced asset: $asset" >&2
         exit 1
     }
-done < <(sed -nE 's/.*(css\/[^" ]+|js\/[^" ]+).*/\1/p' "$DIST_DIR/index.html")
+done < <(grep -oE '(css|js)/[^"'"'"' ]+' "$DIST_DIR/index.html" | sort -u)
 
 find "$DIST_DIR/api" -type f -name '*.php' -print0 |
     xargs -0 -r -n1 php -l >/dev/null