diff --git a/base/serialize.go b/base/serialize.go
index 5cf7ebe..bc134f9 100644
--- a/base/serialize.go
+++ b/base/serialize.go
@@ -122,6 +122,7 @@ func ReadSerializedClassifierStub(filePath string) (*ClassifierDeserializer, err
 	if err != nil {
 		return nil, DescribeError("Can't open file", err)
 	}
+	defer f.Close()
 
 	gzr, err := gzip.NewReader(f)
 	if err != nil {