diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index fb970b5c..e1221890
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ protobuf==3.5.1
 six==1.11.0
 Werkzeug==0.14.1
 wikipedia==1.4.0
-nltk==3.3.0
+nltk==3.6.3
 duckduckpy==0.2
 rake-nltk==1.0.4
 google==2.0.2
diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index f3d57179..1a130c74
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
         'six==1.11.0',
         'Werkzeug==0.14.1',
         'wikipedia==1.4.0',
-        'nltk==3.3.0',
+        'nltk==3.6.3',
         'duckduckpy==0.2',
         'rake-nltk==1.0.4',
         'google==2.0.2',