diff --git a/ner-eval/my_nltk/requirements.txt b/ner-eval/my_nltk/requirements.txt
index 4d1d30e..36997eb 100644
--- a/ner-eval/my_nltk/requirements.txt
+++ b/ner-eval/my_nltk/requirements.txt
@@ -1 +1 @@
-nltk==3.5
+nltk==3.6.6