diff --git a/python/requirements.txt b/python/requirements.txt
index 6a88d61a94c182db3320e4de30f45be4c852f70f..7eee61bb2f0d1c766e9516ac0e9247dba5cab73b 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -5,11 +5,9 @@ protobuf>=3.1.0
 gast==0.3.3
 matplotlib<=2.2.4 ; python_version<"3.6"
 scipy>=0.19.0, <=1.2.1 ; python_version<"3.5"
-nltk>=3.2.2, <=3.4 ; python_version<"3.5"
 matplotlib<=3.2.1 ; python_version>="3.6"
 scipy<=1.3.1 ; python_version=="3.5"
 scipy ; python_version>"3.5"
-nltk ; python_version>="3.5"
 rarfile
 Pillow
 six