diff --git a/gptc/pack.py b/gptc/pack.py
index 4177ad8..931fc01 100644
--- a/gptc/pack.py
+++ b/gptc/pack.py
@@ -2,11 +2,12 @@
 
 import sys
 import os
+from typing import List, Dict, Tuple
 
 
-def pack(directory, print_exceptions=False):
+def pack(directory: str, print_exceptions: bool=False) -> Tuple[List[Dict[str, str]], List[Tuple[Exception]]]:
     paths = os.listdir(directory)
-    texts = {}
+    texts: Dict[str, List[str]] = {}
     exceptions = []
 
     for path in paths: