diff --git a/CHANGES.md b/CHANGES.md
index 7dcd1d547..36750040d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -12,6 +12,7 @@
 
 * Pin FastAPI to 0.67 to avoid issues with rendering OpenAPI documentation ([#246](https://github.com/stac-utils/stac-fastapi/pull/246))
 * Restrict `limit` parameter in sqlalchemy backend to between 1 and 10,000. ([#251](https://github.com/stac-utils/stac-fastapi/pull/251))
+* Fix OAS conformance URL ([#263](https://github.com/stac-utils/stac-fastapi/pull/263))
 
 ## [2.1.0]
 
diff --git a/stac_fastapi/types/stac_fastapi/types/conformance.py b/stac_fastapi/types/stac_fastapi/types/conformance.py
index 36a5e869b..b3fe6dbce 100644
--- a/stac_fastapi/types/stac_fastapi/types/conformance.py
+++ b/stac_fastapi/types/stac_fastapi/types/conformance.py
@@ -14,7 +14,7 @@ class OAFConformanceClasses(str, Enum):
     """Conformance classes for OGC API - Features."""
 
     CORE = "http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/core"
-    OPEN_API = "http://www.opengis.net/spec/ogcapi-features-1/1.0/req/oas30"
+    OPEN_API = "http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/oas30"
     GEOJSON = "http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/geojson"