diff --git a/lib/src/libgit2.dart b/lib/src/libgit2.dart
index 5a5bc28..3f52a8e 100644
--- a/lib/src/libgit2.dart
+++ b/lib/src/libgit2.dart
@@ -5,6 +5,8 @@ import 'package:libgit2dart/libgit2dart.dart';
 import 'package:libgit2dart/src/util.dart';
 
 class Libgit2 {
+  Libgit2._();
+
   /// Returns libgit2 version number.
   static String get version {
     libgit2.git_libgit2_init();