diff --git a/requirements.txt b/requirements.txt
index 22a279e..9cdd29f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-transformers
+transformers==2.1.1
 torch
 numpy
 tqdm
@@ -6,4 +6,4 @@ sklearn
 keras
 tb-nightly
 future
-thulac
\ No newline at end of file
+thulac