diff --git a/requirements.txt b/requirements.txt
index 3b305a8..272297f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-nltk==3.8.1
+nltk==3.9
 wikipedia==1.4.0
 inflection==0.3.1
 python-dateutil==2.7.3
diff --git a/setup.py b/setup.py
index 086cb39..c93e6d7 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
       license='GPL-3.0',
       classifiers=classifiers,
       install_requires=[
-          'nltk==3.8.1',
+          'nltk==3.9',
           'wikipedia==1.4.0',
           'inflection==0.3.1',
           'python-dateutil==2.7.3',