diff --git a/libcontainer/cgroups/fs/paths.go b/libcontainer/cgroups/fs/paths.go
index c5d234acf1a..5f119bac31b 100644
--- a/libcontainer/cgroups/fs/paths.go
+++ b/libcontainer/cgroups/fs/paths.go
@@ -83,6 +83,7 @@ func tryDefaultCgroupRoot() string {
 	if err != nil {
 		return ""
 	}
+	defer dir.Close()
 	names, err := dir.Readdirnames(1)
 	if err != nil {
 		return ""
diff --git a/update.go b/update.go
index 425ce135397..e5de1a77f57 100644
--- a/update.go
+++ b/update.go
@@ -182,6 +182,7 @@ other options are ignored.
 				if err != nil {
 					return err
 				}
+				defer f.Close()
 			}
 			err = json.NewDecoder(f).Decode(&r)
 			if err != nil {