diff --git a/backup.sh b/backup.sh
index 384326b..66cb35a 100755
--- a/backup.sh
+++ b/backup.sh
@@ -1,11 +1,15 @@
 #!/usr/bin/env bash
 
-source ./venv/bin/activate
-
 set -o nounset
 set -o errexit
 set -o xtrace
 
+if [[ ! -e ./venv ]] ; then
+    python3 -m venv venv
+fi
+source ./venv/bin/activate
+command -v aws || pip install -r ./requirements.txt
+
 export GNUPGHOME=./gpghome
 
 bucket="${1}" ; shift