diff --git a/requirements.txt b/requirements.txt
index 956add56..5d8cbe11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-ladybug-core==0.42.8
+ladybug-core==0.42.9
 ladybug-geometry-polyskel==1.4.31
 honeybee-schema==1.56.0;python_version>='3.7'