diff --git a/src/apps.json b/src/apps.json
index 5a0c1bae4..d2c14335f 100644
--- a/src/apps.json
+++ b/src/apps.json
@@ -8387,6 +8387,9 @@
       "meta": {
         "csrf-param": "^authenticity_token$\\;confidence:50"
       },
+      "cookies": {
+        "_session_id": "\\;confidence:75"
+      },
       "script": "/assets/application-[a-z\\d]{32}/\\.js\\;confidence:50",
       "website": "https://rubyonrails.org"
     },