diff --git a/requirements.txt b/requirements.txt
index bd8768f..4a20637 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 mmcif-pdbx~=2.0.1
-numpy~=1.21.4
+numpy~=1.23.3
 orjson~=3.6.4