diff --git a/api/client-server/openid.yaml b/api/client-server/openid.yaml
index 4b89232e..cb982fb3 100644
--- a/api/client-server/openid.yaml
+++ b/api/client-server/openid.yaml
@@ -90,7 +90,7 @@ paths:
                   The homeserver domain the consumer should use when attempting to
                   verify the user's identity.
               expires_in:
-                type: int
+                type: integer
                 description: |-
                   The number of seconds before this token expires and a new one must
                   be generated.