diff --git a/tei2json/requirements.txt b/tei2json/requirements.txt
index dbb06c7..2f47880 100644
--- a/tei2json/requirements.txt
+++ b/tei2json/requirements.txt
@@ -48,7 +48,7 @@ mistune==0.8.4
 nbconvert==5.6.1
 nbformat==5.0.6
 notebook==6.0.3
-numpy==1.18.4
+numpy==1.22.0
 pandas==1.0.3
 pandocfilters==1.4.2
 parso==0.7.0