diff --git a/src/apify_client/clients/resource_clients/build.py b/src/apify_client/clients/resource_clients/build.py
index 19e25fac..bbc91f59 100644
--- a/src/apify_client/clients/resource_clients/build.py
+++ b/src/apify_client/clients/resource_clients/build.py
@@ -43,16 +43,16 @@ def abort(self) -> dict:
         """
         return self._abort()
 
-    def get_open_api_specification(self) -> dict | None:
-        """Return OpenAPI specification of the Actor's build.
+    def get_open_api_definition(self) -> dict | None:
+        """Return OpenAPI definition of the Actor's build.
 
-        https://docs.apify.com/api/v2/actor-build-openapi-specification-get
+        https://docs.apify.com/api/v2/actor-build-openapi-json-get
 
         Returns:
-            OpenAPI specification of the Actor's build.
+            OpenAPI definition of the Actor's build.
         """
         response = self.http_client.call(
-            url=self._url('openapi-specification'),
+            url=self._url('openapi.json'),
             method='GET',
         )
 
@@ -120,16 +120,16 @@ async def delete(self) -> None:
         """
         return await self._delete()
 
-    async def get_open_api_specification(self) -> dict | None:
-        """Return OpenAPI specification of the Actor's build.
+    async def get_open_api_definition(self) -> dict | None:
+        """Return OpenAPI definition of the Actor's build.
 
-        https://docs.apify.com/api/v2/actor-build-openapi-specification-get
+        https://docs.apify.com/api/v2/actor-build-openapi-json-get
 
         Returns:
-            OpenAPI specification of the Actor's build.
+            OpenAPI definition of the Actor's build.
         """
         response = await self.http_client.call(
-            url=self._url('openapi-specification'),
+            url=self._url('openapi.json'),
             method='GET',
         )