diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
index 801bd6f..5ec977a 160000
--- a/gitdb/ext/smmap
+++ b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 801bd6f5722aa21be54ea5b113b7a73595857e1c
+Subproject commit 5ec977a3b280e5dccb40cb20eba56ea26a84bd48