From 48fb9d94b1fe62679c60877a79ce6194f2b55850 Mon Sep 17 00:00:00 2001
From: Daniel Huppmann <dh@dergelbesalon.at>
Date: Mon, 5 Aug 2024 13:42:41 +0200
Subject: [PATCH] Pin matplotlib due to failing Windows GitHub Action CI

---
 pyproject.toml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 848fe82bc..d4f7a5fdd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,8 @@ classifiers = [
 python = ">=3.10, <3.13"
 iam-units = ">=2020.4.21"
 ixmp4 = ">=0.9.0"
-matplotlib = ">=3.6.0"
+matplotlib = ">=3.6.0, <=3.9.0"  # quickfix due to failing tests on Windows
+# see github.com/matplotlib/matplotlib/issues/28551
 numpy = ">=1.26.0, <2.0"
 openpyxl = ">=3.1.2"
 pandas = ">=2.1.2"