diff --git a/llments/eval/factscore/atomic_facts.py b/llments/eval/factscore/atomic_facts.py
index 5d0f252..d19fe6c 100644
--- a/llments/eval/factscore/atomic_facts.py
+++ b/llments/eval/factscore/atomic_facts.py
@@ -8,7 +8,7 @@
 from rank_bm25 import BM25Okapi
 import os
 from nltk.tokenize import sent_tokenize
-from typing import List, Tuple, Optional, Any, Set, cast
+from typing import List, Tuple, Optional, Any, Set, Sequence, cast
 
 from factscore.openai_lm import OpenAIModel