diff --git a/.env b/.env
index fab225c..61fca59 100644
--- a/.env
+++ b/.env
@@ -6,6 +6,7 @@ POSTGRES_PORT=5432
 QUICKSTART_MIN_ZOOM=0
 QUICKSTART_MAX_ZOOM=7
 DIFF_MODE=false
+TOOLS_VERSION=3.1.0
 
 BBOX=-180.0,-85.0511,180.0,85.0511
 MIN_ZOOM=0