diff --git a/postdeploy.sh b/postdeploy.sh
index 86955231..d3e03b65 100755
--- a/postdeploy.sh
+++ b/postdeploy.sh
@@ -8,11 +8,11 @@ python manage.py migrate --noinput
 case "$HEROKU_APP_NAME" in
   documentcloud-staging)
     echo "Running staging Lambda update..."
-    ./config/aws/lambda/codeship_deploy_lambdas.sh staging-lambda --staging
+    bash "$(dirname "$0")/codeship_deploy_lambdas.sh" staging-lambda --staging
     ;;
   documentcloud-prod)
     echo "Running production Lambda update..."
-    ./config/aws/lambda/codeship_deploy_lambdas.sh prod-lambda
+    bash "$(dirname "$0")/codeship_deploy_lambdas.sh" prod-lambda
     ;;
   *)
     echo "No matching Lambda update for app: $HEROKU_APP_NAME"