diff --git a/src/bonsai/Makefile b/src/bonsai/Makefile
index 62687e6dd1..1a9ad6d219 100644
--- a/src/bonsai/Makefile
+++ b/src/bonsai/Makefile
@@ -85,7 +85,7 @@ BLENDER_PLATFORM:=windows-x64
 endif
 
 # Current build commit hash.
-OLD:=a2538fd
+OLD:=463289e
 .PHONY: bump
 bump:
 ifndef NEW
diff --git a/src/ifcopenshell-python/Makefile b/src/ifcopenshell-python/Makefile
index 8bac2cc790..eaec73e0a7 100644
--- a/src/ifcopenshell-python/Makefile
+++ b/src/ifcopenshell-python/Makefile
@@ -54,8 +54,8 @@ ifeq ($(PLATFORM), win64)
 PLATFORMTAG:=win_amd64
 endif
 
-IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v0.8.1-a2538fd-$(PLATFORM).zip
-IFCCONVERT_URL:=https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.1-a2538fd-$(PLATFORM).zip
+IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v0.8.1-463289e-$(PLATFORM).zip
+IFCCONVERT_URL:=https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.1-463289e-$(PLATFORM).zip
 
 .PHONY: test
 test: