diff --git a/cldf/requirements.txt b/cldf/requirements.txt
index cc96c76..b4125b6 100644
--- a/cldf/requirements.txt
+++ b/cldf/requirements.txt
@@ -16,7 +16,7 @@ lingpy==2.6.6
 Markdown==3.1.1
 networkx==2.2
 newick==1.0.0
-numpy==1.17.5
+numpy==1.22.0
 openpyxl==3.0.3
 packaging==20.1
 pandas==0.25.3