diff -Naur gitea-1.13.1/routers/init.go gitea-1.13.1.new/routers/init.go
--- gitea-1.13.1/routers/init.go	2020-12-28 18:36:22.000000000 +0100
+++ gitea-1.13.1.new/routers/init.go	2021-01-04 08:26:51.969230777 +0100
@@ -117,6 +117,8 @@
 		DefaultLang:  "en-US",
 		Redirect:     false,
 		CookieDomain: setting.SessionConfig.Domain,
+		Secure:       setting.SessionConfig.Secure,
+		CookieHttpOnly: setting.CSRFCookieHTTPOnly,
 	})
 }
 
diff -Naur gitea-1.13.1/routers/routes/routes.go gitea-1.13.1.new/routers/routes/routes.go
--- gitea-1.13.1/routers/routes/routes.go	2020-12-28 18:36:22.000000000 +0100
+++ gitea-1.13.1.new/routers/routes/routes.go	2021-01-04 08:27:38.104746507 +0100
@@ -254,6 +254,8 @@
 		DefaultLang:  "en-US",
 		Redirect:     false,
 		CookieDomain: setting.SessionConfig.Domain,
+		Secure:       setting.SessionConfig.Secure,
+		CookieHttpOnly: setting.CSRFCookieHTTPOnly,
 	}))
 	m.Use(cache.Cacher(cache.Options{
 		Adapter:       setting.CacheService.Adapter,