diff --git a/requirements.txt b/requirements.txt
index f5bf2aa..911c973 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,4 @@ click==1.0.0
 sphinx-rtd-theme==0.1.7
 sphinxcontrib-napoleon==0.3.1
 nltk==3.0.2
-numpy==1.9.2
+numpy==1.21.0