diff --git a/requirements.txt b/requirements.txt
index 53a1f73..d165ff9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ MarkupSafe==0.23
 matplotlib==1.5.1
 networkx==1.11
 nltk==3.4.5
-numpy==1.11.0
+numpy==1.21.0
 packaging==16.8
 pyasn1==0.1.9
 pyasn1-modules==0.0.8