diff --git a/Dockerfile b/Dockerfile
index 024de41..99f04a4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,6 +57,8 @@ USER rails:rails
 # Entrypoint prepares the database.
 ENTRYPOINT ["/rails/bin/docker-entrypoint"]
 
+ENV TLS_DOMAIN=datadeaddrop.com
+
 # Start the server by default, this can be overwritten at runtime
 EXPOSE 80
 CMD ["./bin/thrust", "./bin/rails", "server"]