diff --git a/server/config/calibre-web/docker-compose.yml b/server/config/calibre-web/docker-compose.yml
index 62e9ef9..b0221bb 100644
--- a/server/config/calibre-web/docker-compose.yml
+++ b/server/config/calibre-web/docker-compose.yml
@@ -64,7 +64,7 @@ services:
     labels:
       - traefik.http.routers.calibre-dev.rule=Host(`dev.calibre.jafner.net`)
       - traefik.http.routers.calibre-dev.tls.certresolver=lets-encrypt
-      - traefik.http.routers.calibre-dev.middlewares=securityheaders@file
+      - traefik.http.routers.calibre-dev.middlewares=securityheaders@file,testSchemeHeaders@file
     networks:
       - web
 
diff --git a/server/config/traefik/config/middlewares.yaml b/server/config/traefik/config/middlewares.yaml
index 6def79d..93e1423 100644
--- a/server/config/traefik/config/middlewares.yaml
+++ b/server/config/traefik/config/middlewares.yaml
@@ -42,3 +42,7 @@ http:
         stsIncludeSubdomains: true
         stsSeconds: 63072000
         stsPreload: true
+    testSchemeHeaders:
+      headers:
+        customResponseHeaders: 
+          X-Scheme: https