diff --git a/requirements.txt b/requirements.txt
index d56c60b..1696a36 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
-torchtext==0.4.0
-tqdm==4.28.1
-torch==1.0.0
-pytorch_crf==0.7.0
-scikit_learn==0.20.2
+torchtext>=0.4.0
+tqdm>=4.28.1
+torch>=1.0.0
+pytorch_crf>=0.7.0
+scikit_learn>=0.20.2
 revtok
 jieba
 regex