diff --git a/src/bonsai/Makefile b/src/bonsai/Makefile
index ef469d29cc..a0c6b9d16e 100644
--- a/src/bonsai/Makefile
+++ b/src/bonsai/Makefile
@@ -81,7 +81,7 @@ BLENDER_PLATFORM:=windows-x64
 endif
 
 # Current build commit hash.
-OLD:=f5e02d1
+OLD:=03935a9
 .PHONY: bump
 bump:
 ifndef NEW
diff --git a/src/ifcopenshell-python/Makefile b/src/ifcopenshell-python/Makefile
index 6239a44476..33c92a85a0 100644
--- a/src/ifcopenshell-python/Makefile
+++ b/src/ifcopenshell-python/Makefile
@@ -52,8 +52,8 @@ ifeq ($(PLATFORM), win64)
 PLATFORMTAG:=win_amd64
 endif
 
-IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-f5e02d1-$(PLATFORM).zip
-IFCCONVERT_URL:=https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v$(VERSION)-f5e02d1-$(PLATFORM).zip
+IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-03935a9-$(PLATFORM).zip
+IFCCONVERT_URL:=https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v$(VERSION)-03935a9-$(PLATFORM).zip
 
 .PHONY: test
 test: