fix open encoding error.

1 files changed, 1 insertions, 1 deletions

diff --git a/gitdb/db/ref.py b/gitdb/db/ref.py
index 2e3db86..84f9f6c 100644
--- a/gitdb/db/ref.py
+++ b/gitdb/db/ref.py
@@ -41,7 +41,7 @@ class ReferenceDB(CompoundDB):
         # try to get as many as possible, don't fail if some are unavailable
         ref_paths = list()
         try:
-            with open(self._ref_file, 'r') as f:
+            with open(self._ref_file, 'r', encoding="utf-8") as f:
                 ref_paths = [l.strip() for l in f]
         except (OSError, IOError):
             pass