diff --git a/app.moon b/app.moon
index b244870..b59cdfe 100644
--- a/app.moon
+++ b/app.moon
@@ -24,8 +24,8 @@ class App extends lapis.Application
       config = require("lapis.config").get!
 
       p config.port
-      p os.getenv "POSTGRESQL_PORT_5432_TCP_PORT"
-      p os.getenv "POSTGRESQL_PORT_5432_TCP_ADDR"
-      p os.getenv "DB_USER"
-      p os.getenv "DB_PASS"
-      p os.getenv "DB_NAME"
+      p tostring os.getenv "POSTGRESQL_PORT_5432_TCP_PORT"
+      p tostring os.getenv "POSTGRESQL_PORT_5432_TCP_ADDR"
+      p tostring os.getenv "DB_USER"
+      p tostring os.getenv "DB_PASS"
+      p tostring os.getenv "DB_NAME"