diff --git a/src/app/generator.py b/src/app/generator.py
index dc3c540..dc58886 100644
--- a/src/app/generator.py
+++ b/src/app/generator.py
@@ -50,7 +50,7 @@ class ReleaseApi(Api):
 			# At last join the current tag to an index file
 			index_path = join(path, f'{repository_name}.json')
 			
-			index = read_json(index_path)
+			index = read_json(index_path, [])
 			if tag not in index: # TODO: Check if there a better way to do this
 				index.append(tag) # Add the current tag to the index
 
diff --git a/src/app/utils.py b/src/app/utils.py
index 2cb34d8..643bdf2 100644
--- a/src/app/utils.py
+++ b/src/app/utils.py
@@ -8,7 +8,7 @@ def write_json(text: str | dict | list, to, overwrite=True):
 				text = json.dumps(text)
 			f.write(text)
 
-def read_json(path, default=[]):
+def read_json(path, default):
 	if os.path.exists(path):
 		with open(path, 'r') as f:
 			return json.load(f)