diff --git a/markdown_link_check_config.json b/markdown_link_check_config.json
index 3c93e3dc3..80a672438 100644
--- a/markdown_link_check_config.json
+++ b/markdown_link_check_config.json
@@ -17,6 +17,9 @@
     },
     {
       "pattern": "^https://sourceware\\.org/"
+    },
+    {
+      "pattern": "^https://openjs-foundation\\.slack\\.com/"
     }
   ]
 }