diff --git a/precheck/requirements.txt b/precheck/requirements.txt
index 04b77d1..cbde4ac 100644
--- a/precheck/requirements.txt
+++ b/precheck/requirements.txt
@@ -1,4 +1,4 @@
-klayout==0.29.0
+klayout<0.30.0,>=0.29.0
 gdstk==0.9.50
 pytest==7.4.3
 PyYAML==6.0.1