diff --git a/src/blenderbim/Makefile b/src/blenderbim/Makefile
index bda346ec24..f2fd61d0b4 100644
--- a/src/blenderbim/Makefile
+++ b/src/blenderbim/Makefile
@@ -83,7 +83,7 @@ PYPI_PLATFORM:=--platform win_amd64
 endif
 
 # Current build commit hash.
-OLD:=79f96d2
+OLD:=c18e4ea
 .PHONY: bump
 bump:
 	cd . && $(SED) -b "s/$(OLD)/$(NEW)/" Makefile
diff --git a/src/ifcopenshell-python/Makefile b/src/ifcopenshell-python/Makefile
index 96bc340095..849f2abd03 100644
--- a/src/ifcopenshell-python/Makefile
+++ b/src/ifcopenshell-python/Makefile
@@ -44,7 +44,7 @@ ifeq ($(PLATFORM), win64)
 PLATFORMTAG:=win_amd64
 endif
 
-IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-79f96d2-$(PLATFORM).zip
+IOS_URL:=https://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-$(PYNUMBER)-v$(VERSION)-c18e4ea-$(PLATFORM).zip
 
 .PHONY: test
 test:
diff --git a/src/ifcopenshell-python/docs/ifcconvert/installation.rst b/src/ifcopenshell-python/docs/ifcconvert/installation.rst
index cb33434806..963722856d 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-v0.8.0-79f96d2-linux64.zip
-.. _build-win32: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-79f96d2-win32.zip
-.. _build-win64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-79f96d2-win64.zip
-.. _build-macos64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-79f96d2-macos64.zip
-.. _build-macosm164: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-79f96d2-macosm164.zip
+.. _build-linux64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-c18e4ea-linux64.zip
+.. _build-win32: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-c18e4ea-win32.zip
+.. _build-win64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-c18e4ea-win64.zip
+.. _build-macos64: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-c18e4ea-macos64.zip
+.. _build-macosm164: https://s3.amazonaws.com/ifcopenshell-builds/IfcConvert-v0.8.0-c18e4ea-macosm164.zip
 
 2. Unzip the downloaded file and run IfcConvert using the command line.