diff --git a/morss.py b/morss.py
index 76a609d..8c08c16 100644
--- a/morss.py
+++ b/morss.py
@@ -170,7 +170,7 @@ class Cache:
 		if not os.path.exists(self._dir):
 			os.makedirs(self._dir)
 
-		with open(self._file, 'w') as file:
+		with open(self._file, 'w+') as file:
 			file.write(json.dumps(self._cache, indent=4))
 
 	def isYoungerThan(self, sec):