diff --git a/docs/requirements.txt b/docs/requirements.txt
index 61a52d6..3200461 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -15,7 +15,7 @@ livereload==2.4.1
 MarkupSafe==0.23
 nose==1.3.7
 nose-cov==1.6
-numpy==1.11.0
+numpy==1.22.0
 pathtools==0.1.2
 port-for==0.3.1
 Pygments==2.1.3