diff --git a/src/links/v1/providers.json b/src/links/v1/providers.json
index 34c0223..dff4e77 100644
--- a/src/links/v1/providers.json
+++ b/src/links/v1/providers.json
@@ -113,7 +113,7 @@
       "attributes": {
         "name": "Materials Cloud",
         "description": "A platform for Open Science built for seamless sharing of resources in computational materials science",
-        "base_url": "https://www.materialscloud.org/optimade",
+        "base_url": "https://www.materialscloud.org/optimade/main",
         "homepage": "https://www.materialscloud.org",
         "link_type": "external"
       }