diff --git a/experiment/download_apk.sh b/experiment/download_apk.sh
index c2e89fa..9394c00 100644
--- a/experiment/download_apk.sh
+++ b/experiment/download_apk.sh
@@ -39,7 +39,7 @@ worker() {
 }
 
 for lst in $(ls "${TMP_DIR}/apks/"); do
-  worker "${lst}"
+  worker "${lst}" &
 done
 
 rm -rf "${TMP_DIR}"