diff --git a/src/blenderbim/Makefile b/src/blenderbim/Makefile
index e066f56afa..284590edf3 100644
--- a/src/blenderbim/Makefile
+++ b/src/blenderbim/Makefile
@@ -83,7 +83,7 @@ PYPI_PLATFORM:=--platform win_amd64
 endif
 
 # Current build commit hash.
-OLD:=42b96d6
+OLD:=dda4dd3
 .PHONY: bump
 bump:
 	cd . && $(SED) -b "s/$(OLD)/$(NEW)/" Makefile
diff --git a/src/ifcopenshell-python/Makefile b/src/ifcopenshell-python/Makefile
index fd880d086f..28a0d7036a 100644
--- a/src/ifcopenshell-python/Makefile
+++ b/src/ifcopenshell-python/Makefile
@@ -44,7 +44,7 @@ ifeq ($(PLATFORM), win64)
 PLATFORMTAG:=win_amd64
 endif
 
-IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-42b96d6-$(PLATFORM).zip
+IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-dda4dd3-$(PLATFORM).zip
 
 .PHONY: test
 test:
diff --git a/src/ifcopenshell-python/docs/ifcconvert/installation.rst b/src/ifcopenshell-python/docs/ifcconvert/installation.rst
index a4b48ddcc9..5873c43f5d 100644
--- a/src/ifcopenshell-python/docs/ifcconvert/installation.rst
+++ b/src/ifcopenshell-python/docs/ifcconvert/installation.rst
@@ -20,11 +20,11 @@ Pre-built packages
    | build-linux64_ | build-win32_   | build-win64_   | build-macos64_ | build-macosm164_ |
    +----------------+----------------+----------------+----------------+------------------+
 
-.. _build-linux64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-42b96d6-linux64.zip
-.. _build-win32: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-42b96d6-win32.zip
-.. _build-win64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-42b96d6-win64.zip
-.. _build-macos64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-42b96d6-macos64.zip
-.. _build-macosm164: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-42b96d6-macosm164.zip
+.. _build-linux64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-dda4dd3-linux64.zip
+.. _build-win32: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-dda4dd3-win32.zip
+.. _build-win64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-dda4dd3-win64.zip
+.. _build-macos64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-dda4dd3-macos64.zip
+.. _build-macosm164: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-dda4dd3-macosm164.zip
 
 2. Unzip the downloaded file and run IfcConvert using the command line.