diff --git a/.github/workflows/niceplots.yml b/.github/workflows/niceplots.yml
index 8ce1784..083ae68 100644
--- a/.github/workflows/niceplots.yml
+++ b/.github/workflows/niceplots.yml
@@ -20,9 +20,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix: # Test 3 versions of python, and the latest and oldest supported versions of numpy and matplotlib, according to https://scientific-python.org/specs/spec-0000/
-        python-version: ["3.9", "3.10", "3.11"]
-        numpy-version: ["1.23.*", "1.26.*"]
-        mpl-version: ["3.6.*", "3.8.*"]
+        python-version: ["3.10", "3.11", "3.12"]
+        numpy-version: ["<2", ">=2.2"]
+        mpl-version: ["==3.8.*", "==3.10.*"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
@@ -40,8 +40,8 @@ jobs:
       - name: Install python dependencies
         run: |
           pip install --upgrade pip wheel
-          pip install numpy==${{ matrix.numpy-version }}
-          pip install matplotlib==${{ matrix.mpl-version }}
+          pip install "numpy${{ matrix.numpy-version }}"
+          pip install "matplotlib${{ matrix.mpl-version }}"
           pip install .
       - name: Test examples
         run: |
diff --git a/examples/plot_style_demo.py b/examples/plot_style_demo.py
index d412e00..c26e3c1 100644
--- a/examples/plot_style_demo.py
+++ b/examples/plot_style_demo.py
@@ -50,7 +50,7 @@ def gaussian(x, mu, sig):
         if formatting != "default":
             colours = niceplots.get_colors()
 
-        fig, ax = plt.subplots()
+        fig, ax = plt.subplots(figsize=(7, 5))
 
         # Plotting tip #1, only add axis ticks at important values
         ax.set_yticks([0, 0.4])
diff --git a/examples/ref/default_style_demo.png b/examples/ref/default_style_demo.png
index c9dd9f6..2356f6e 100644
Binary files a/examples/ref/default_style_demo.png and b/examples/ref/default_style_demo.png differ
diff --git a/examples/ref/doumont-dark_style_demo.png b/examples/ref/doumont-dark_style_demo.png
index 4704268..58d81d9 100644
Binary files a/examples/ref/doumont-dark_style_demo.png and b/examples/ref/doumont-dark_style_demo.png differ
diff --git a/examples/ref/doumont-light_style_demo.png b/examples/ref/doumont-light_style_demo.png
index ab86bba..f1339a6 100644
Binary files a/examples/ref/doumont-light_style_demo.png and b/examples/ref/doumont-light_style_demo.png differ
diff --git a/examples/ref/james-dark_style_demo.png b/examples/ref/james-dark_style_demo.png
index fc59af6..1537c01 100644
Binary files a/examples/ref/james-dark_style_demo.png and b/examples/ref/james-dark_style_demo.png differ
diff --git a/examples/ref/james-light_style_demo.png b/examples/ref/james-light_style_demo.png
index d2a822c..b500d41 100644
Binary files a/examples/ref/james-light_style_demo.png and b/examples/ref/james-light_style_demo.png differ