diff --git a/EmulationCore/requirements.txt b/EmulationCore/requirements.txt
index bfd8e5a..a5d78d7 100644
--- a/EmulationCore/requirements.txt
+++ b/EmulationCore/requirements.txt
@@ -2,6 +2,6 @@ PyAudio==0.2.11
 pyttsx3==2.7
 SpeechRecognition==3.8.1
 numpy
-nltk==3.3
+nltk==3.6.3
 emucorebrain==0.5.4
 pip==9.0.3
\ No newline at end of file
diff --git a/EmulationCore/requirements_windows.txt b/EmulationCore/requirements_windows.txt
index 20f26f1..33df349 100644
--- a/EmulationCore/requirements_windows.txt
+++ b/EmulationCore/requirements_windows.txt
@@ -3,5 +3,5 @@ pyttsx3==2.7
 pywin32==223
 SpeechRecognition==3.8.1
 numpy==1.14.3
-nltk==3.3
+nltk==3.6.3
 emucorebrain==0.5.4
\ No newline at end of file