diff --git a/requirements.txt b/requirements.txt
index 41c4e79f..ea57ad45 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 ladybug-grasshopper==1.67.18
-honeybee-grasshopper-core==1.39.0
+honeybee-grasshopper-core==1.39.1
 honeybee-grasshopper-radiance==1.34.4
 honeybee-grasshopper-energy==1.56.11
 dragonfly-grasshopper==1.59.0