diff --git a/requirements.txt b/requirements.txt
index fb90a4d..09951d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ mistune==0.7.4
 nbconvert==5.2.1
 nbformat==4.4.0
 notebook==5.0.0
-numpy==1.13.1
+numpy==1.21.0
 pandocfilters==1.4.2
 path.py==10.3.1
 pickleshare==0.7.4