diff --git a/box.go b/box.go
index 77199fa..ca9f606 100644
--- a/box.go
+++ b/box.go
@@ -78,9 +78,6 @@ func (b *Box) ZFSIsLastSnapshot(src Snapshot) (is bool, err error) {
 		return
 	}
 
-	b.zfs.M.Lock()
-	defer b.zfs.M.Unlock()
-
 	_, err = b.ZFSGetNextSnapshot(src)
 	if err != nil {
 		if err.Error() == "no snapshot" {
diff --git a/version.go b/version.go
index 19f40ef..ca74912 100644
--- a/version.go
+++ b/version.go
@@ -1,6 +1,6 @@
 // Code generated by version.sh (@generated) DO NOT EDIT.
 package main
-var githash = "c93aa20"
-var buildstamp = "2021-11-14_10:14:42"
-var commits = "25"
-var version = "c93aa20-b25 - 2021-11-14_10:14:42"
+var githash = "d2e5b34"
+var buildstamp = "2021-11-14_10:19:30"
+var commits = "26"
+var version = "d2e5b34-b26 - 2021-11-14_10:19:30"