diff --git a/.github/workflows/cpu-tests.yml b/.github/workflows/cpu-tests.yml
index fbe8fb21d7..a9ec161c93 100644
--- a/.github/workflows/cpu-tests.yml
+++ b/.github/workflows/cpu-tests.yml
@@ -79,10 +79,10 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-22.04"]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
         requires: ["latest"]
         include:
-          - { os: "ubuntu-22.04", python-version: "3.9", requires: "oldest" }
+          - { os: "ubuntu-22.04", python-version: "3.10", requires: "oldest" }
           - { os: "windows-2022", python-version: "3.10", requires: "latest" }
           - { os: "macOS-14", python-version: "3.10", requires: "latest" }
     timeout-minutes: 35
diff --git a/pyproject.toml b/pyproject.toml
index b4fc2c8cca..9046077ae2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
   # download models:
   "huggingface-hub>=0.30,<0.35",
   "jsonargparse[signatures]>=4.31,<=4.32.1; python_version<'3.10'", # 4.33 does not seem to be compatible with Python 3.9
-  "jsonargparse[signatures]>=4.37,<=4.41; python_version>'3.9'",    # required to work with python3.12+
+  "jsonargparse[signatures]>=4.37,<=4.41; python_version>='3.10'",  # required to work with Python >=3.10
   "lightning>=2.5",
   "psutil==7",
   "safetensors>=0.4.3",