diff --git a/negate/negate.py b/negate/negate.py
index e80e69c..54e973c 100644
--- a/negate/negate.py
+++ b/negate/negate.py
@@ -8,6 +8,7 @@
 from typing import Dict, List, Optional, Tuple, Union
 
 import spacy
+import spacy_transformers
 from lemminflect import getInflection, getLemma
 from spacy.symbols import AUX, NOUN, PRON, VERB, neg
 from spacy.tokens import Doc as SpacyDoc