diff --git a/backend/scripts/start-dev b/backend/scripts/start-dev
index 3a7c6f039..210b6cba5 100755
--- a/backend/scripts/start-dev
+++ b/backend/scripts/start-dev
@@ -2,7 +2,7 @@
 
 export PENPOT_HOST=devenv
 export PENPOT_TENANT=dev
-export PENPOT_FLAGS="$PENPOT_FLAGS enable-backend-asserts enable-audit-log enable-cors enable-transit-readable-response enable-demo-users"
+export PENPOT_FLAGS="$PENPOT_FLAGS enable-backend-asserts enable-audit-log enable-cors enable-transit-readable-response enable-demo-users disable-secure-session-cookies"
 
 set -ex