diff --git a/docker/OpenResty-Orthanc-Keycloak/config/nginx.conf b/docker/OpenResty-Orthanc-Keycloak/config/nginx.conf
index f76663b19..f620c9c57 100644
--- a/docker/OpenResty-Orthanc-Keycloak/config/nginx.conf
+++ b/docker/OpenResty-Orthanc-Keycloak/config/nginx.conf
@@ -62,7 +62,11 @@ http {
         gzip_comp_level 9;
         etag on;
 
+        # https://github.com/bungle/lua-resty-session/issues/15
+        set $session_check_ssi off;
         lua_code_cache off;
+        set $session_secret Eeko7aeb6iu5Wohch9Loo1aitha0ahd1;
+        set $session_storage cookie;
 
         # Static content to serve
         root  /var/www/html;