diff --git a/tduck-api/src/main/resources/application.yml b/tduck-api/src/main/resources/application.yml
index 6aab8f4..3d97830 100644
--- a/tduck-api/src/main/resources/application.yml
+++ b/tduck-api/src/main/resources/application.yml
@@ -48,7 +48,7 @@ platform:
   request:
     trace-log: true
   sign:
-    enable: false
+    enable: true
     secret: E91PlWh2MWTcbSWiHv
     ignore-urls:
       - /tduck-api/webjars/**