diff --git a/app.yaml b/app.yaml
index aed7c86..c1df408 100644
--- a/app.yaml
+++ b/app.yaml
@@ -1,5 +1,9 @@
 name: "christine"
 
+overlay:
+ - apt-get update
+ - apt-get install -y lua-sec
+
 dependencies:
  - moonscript
  - github