diff --git a/.github/markdown-link-check-config.json b/.github/markdown-link-check-config.json
index 62a738ae0e..5bc350ef24 100644
--- a/.github/markdown-link-check-config.json
+++ b/.github/markdown-link-check-config.json
@@ -23,6 +23,9 @@
     },
     {
       "pattern": "^https://github\\.com/shakacode/react-webpack-rails-tutorial/blob/master/client/webpack\\.client\\.base\\.config\\.js"
+    },
+    {
+      "pattern": "^https://reactrails\\.slack\\.com"
     }
   ],
   "replacementPatterns": [