diff --git a/ci/deps/requirements.yaml.tmpl b/ci/deps/requirements.yaml.tmpl
index ad39cb8f..051514f5 100644
--- a/ci/deps/requirements.yaml.tmpl
+++ b/ci/deps/requirements.yaml.tmpl
@@ -7,7 +7,7 @@ dependencies:
   - cython>=3.0
   - ecos
   - joblib
-  - matplotlib>=3.8.0,<3.9
+  - matplotlib>=3.9.0,<3.10
   - numexpr
   - numpy={CI_NUMPY_VERSION}
   - osqp!=0.6.0,!=0.6.1