diff --git a/script/server b/script/server
index 1427a7e..5fb2ec9 100755
--- a/script/server
+++ b/script/server
@@ -11,7 +11,7 @@ cd "$(dirname "$0")/.."
 script/update
 
 test -z "$RACK_ENV" &&
-  RACK_ENV='development'
+  export RACK_ENV='development'
 
 # boot the app and any other necessary processes.
 foreman start -p 9393