diff --git a/requirements.txt b/requirements.txt
index 3bf76c5..3d8c98f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -80,7 +80,7 @@ matplotlib==3.4.3
 mongohelper @ file:///home/runner/.cache/pypoetry/artifacts/af/0d/4e/7301d14bf1db9ada7ce2700e87c51a093eecc845201f844fa11b297822/mongohelper-0.0.11-py3-none-any.whl
 msgpack==1.0.2
 multidict @ file:///home/runner/.cache/pypoetry/artifacts/f5/69/c1/e8ec31c0813b46446f7a336c67e8d136d12ab12dc65e13bb8cd1b530ab/multidict-5.2.0-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl
-nltk==3.6.5
+nltk==3.6.6
 numpy==1.21.2
 oauthlib==3.1.1
 opt-einsum==3.3.0