diff --git a/requirements.txt b/requirements.txt
index 79ba3534..3fe3ecdf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-chainer>=1.5.1
-numpy>=1.10
-spacy>=0.9
-scipy>=0.16.0
+chainer==1.5.1
+numpy==1.10
+spacy==0.90
+scipy==0.16.0
 sklearn