diff --git a/docker-compose.development.yml b/docker-compose.development.yml
index 564eae38bdb4a5434981bceff8a6451dddd419ab..3ae1b9c5d6f98baea8d13acc96cf2d57c051f37f 100644
--- a/docker-compose.development.yml
+++ b/docker-compose.development.yml
@@ -2,6 +2,8 @@ version: "3.5"
 
 services:
   nopaque:
+    environment:
+      - FLASK_ENV=development
     ports:
       - "5000:5000"
     volumes: