diff --git a/requirements.txt b/requirements.txt
index 338b540..0400001 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,9 @@
 networkx==2.2
 pandas==0.24.2
 graphviz==0.13.2
-nltk==3.4
+nltk==3.4.5
 docopt==0.6.2
 KafNafParserPy==1.896
 rdfextras==0.4
 rdflib==4.2.2
-nltk==3.4
\ No newline at end of file
+nltk==3.4.5
\ No newline at end of file