diff --git a/.gitmodules b/.gitmodules
index 952ccf9..73313a8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "telepathy-spec"]
 	path = telepathy-spec
-	url = https://github.com/TelepathyIM/telepathy-spec
+	url = https://github.com/TelepathyIM/telepathy-spec.git
+	branch = 0.27.4