diff --git a/precheck/requirements.txt b/precheck/requirements.txt
index a857acb..8477a6a 100644
--- a/precheck/requirements.txt
+++ b/precheck/requirements.txt
@@ -1,3 +1,4 @@
 klayout==0.29.0
 gdstk==0.9.50
 pytest==7.4.3
+numpy==1.24.3