diff --git a/.ci/install-macos.sh b/.ci/install-macos.sh
index d384ba3f2..ceab30778 100755
--- a/.ci/install-macos.sh
+++ b/.ci/install-macos.sh
@@ -39,6 +39,8 @@ if [ -n "${PYUPGRADE_V:-}" ]; then
     echo $PATH
     which python3
     python3 --version
+    brew upgrade libidn2
+    brew upgrade curl
 
     # create new venv
     python3 -m venv /Users/appveyor/venv${PYUPGRADE_V}