diff --git a/code/tools/build_python_framework.sh b/code/tools/build_python_framework.sh
index 6fd9f41b..2ad88160 100755
--- a/code/tools/build_python_framework.sh
+++ b/code/tools/build_python_framework.sh
@@ -4,7 +4,7 @@
 
 TOOLSDIR=$(dirname "$0")
 REQUIREMENTS="${TOOLSDIR}/py3_requirements.txt"
-PYTHON_VERSION=3.9.14
+PYTHON_VERSION=3.9.13
 PYTHON_PRERELEASE_VERSION=
 PYTHON_BASEURL="https://www.python.org/ftp/python/%s/python-%s${PYTHON_PRERELEASE_VERSION}-macos%s.pkg"
 MACOS_VERSION=11