diff --git a/mongo-ruby-driver b/mongo-ruby-driver
index 4e094a87..517891b5 160000
--- a/mongo-ruby-driver
+++ b/mongo-ruby-driver
@@ -1 +1 @@
-Subproject commit 4e094a878848acc16318510afefaebff4293e306
+Subproject commit 517891b56c5e7ef1fd25e825a0c8ff4e3afd5d84