diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 738d607..ed8e038 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -31,9 +31,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python_version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         matplotlib_version:
-          ['3.0', '3.1', '3.2', '3.3', '3.4', '3.5', '3.6', '3.7', '3.8']
+          ['3.0', '3.1', '3.2', '3.3', '3.4', '3.5', '3.6', '3.7', '3.8', '3.9', '3.10']
     steps:
       - uses: actions/checkout@v4
 
diff --git a/.python-version b/.python-version
index 8531a3b..24ee5b1 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.12.2
+3.13
diff --git a/test/snapshot/py3.10_mpl3.10.png b/test/snapshot/py3.10_mpl3.10.png
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index 0000000..b7c9e41
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diff --git a/test/snapshot/py3.10_mpl3.9.png b/test/snapshot/py3.10_mpl3.9.png
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index 0000000..22b9af5
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diff --git a/test/snapshot/py3.11_mpl3.10.png b/test/snapshot/py3.11_mpl3.10.png
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index 0000000..b7c9e41
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diff --git a/test/snapshot/py3.11_mpl3.9.png b/test/snapshot/py3.11_mpl3.9.png
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index 0000000..22b9af5
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diff --git a/test/snapshot/py3.12_mpl3.10.png b/test/snapshot/py3.12_mpl3.10.png
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index 0000000..b7c9e41
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diff --git a/test/snapshot/py3.12_mpl3.9.png b/test/snapshot/py3.12_mpl3.9.png
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index 0000000..22b9af5
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diff --git a/test/snapshot/py3.13_mpl3.10.png b/test/snapshot/py3.13_mpl3.10.png
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index 0000000..b7c9e41
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diff --git a/test/snapshot/py3.13_mpl3.5.png b/test/snapshot/py3.13_mpl3.5.png
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index 0000000..c7c49da
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diff --git a/test/snapshot/py3.13_mpl3.6.png b/test/snapshot/py3.13_mpl3.6.png
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index 0000000..631f72a
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diff --git a/test/snapshot/py3.13_mpl3.7.png b/test/snapshot/py3.13_mpl3.7.png
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index 0000000..82fa412
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diff --git a/test/snapshot/py3.13_mpl3.8.png b/test/snapshot/py3.13_mpl3.8.png
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index 0000000..0f3b091
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diff --git a/test/snapshot/py3.13_mpl3.9.png b/test/snapshot/py3.13_mpl3.9.png
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index 0000000..22b9af5
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diff --git a/test/snapshot/py3.9_mpl3.9.png b/test/snapshot/py3.9_mpl3.9.png
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index 0000000..22b9af5
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