diff --git a/analyzer.py b/analyzer.py
index f42448a..21b4d12 100644
--- a/analyzer.py
+++ b/analyzer.py
@@ -123,7 +123,7 @@ def parse(self, filepath):
         # File id 0 is always the current file (we store only the base file name without .txt extension).
         self._external_references[0] = self._file_index.get_id(os.path.basename(filepath[:-4]))
 
-        with open(filepath) as f:
+        with open(filepath, errors='ignore') as f:
             line = f.readline()
             # Parse external references.
             if line == "External References\n":