diff --git a/upload.sh b/upload.sh
index 58355d1..88a7e64 100755
--- a/upload.sh
+++ b/upload.sh
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 set -e
+shopt -s nullglob
 
 echo "Installing package cloud gem..."
 sudo gem install --no-document package_cloud
@@ -56,4 +57,4 @@ else
     if [ "${SOURCE##*.}" = "deb" ]; then DISTRIBUTIONS="${PACKAGECLOUD_DEB_DISTRIB}"; fi
     PACKAGE_NAME="${SOURCE}"
     upload_file
-fi
\ No newline at end of file
+fi