diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 94fd643..06a30b7
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 pymongo==3.5.1
 tweepy==3.5.0
 ujson==1.35
-nltk==3.4
+nltk==3.4.5
 pandas