diff --git a/.gitmodules b/.gitmodules
index 86f89e64e..d4c7f2c6a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,7 +5,7 @@
 [submodule "third-party/libb64"]
 	path = third-party/libb64
 	url = https://github.com/transmission/libb64.git
-	branch = post-1.2.1-transmission
+	branch = post-2.0.0-transmission
 [submodule "third-party/libevent"]
 	path = third-party/libevent
 	url = https://github.com/transmission/libevent.git