diff --git a/analysis/memote/requirements.txt b/analysis/memote/requirements.txt
index a9802e4..39921c1 100644
--- a/analysis/memote/requirements.txt
+++ b/analysis/memote/requirements.txt
@@ -47,7 +47,7 @@ matplotlib==3.0.2
 memote==0.9.12
 more-itertools==6.0.0
 mpmath==1.1.0
-nltk==3.4
+nltk==3.4.5
 numpy==1.16.2
 numpydoc==0.8.0
 odfpy==1.4.0