diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
index 8f82e6c..c6b53d3 160000
--- a/gitdb/ext/smmap
+++ b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 8f82e6c19661f9b735cc55cc89031a189e408894
+Subproject commit c6b53d35deb82a38d5d07ca7712c1334a7a10c10