diff --git a/precheck/requirements.txt b/precheck/requirements.txt
index 8222ced..04b77d1 100644
--- a/precheck/requirements.txt
+++ b/precheck/requirements.txt
@@ -2,3 +2,4 @@ klayout==0.29.0
 gdstk==0.9.50
 pytest==7.4.3
 PyYAML==6.0.1
+numpy==1.26.4