diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index f45b9eea..19e2f3fb 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -17,10 +17,12 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, ubuntu-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         exclude:
-          - os: macos-latest
-            python-version: "3.7"
+          - os: windows-latest
+            python-version: "3.11"
+          - os: windows-latest
+            python-version: "3.12"
 
     steps:
     - uses: actions/checkout@v2
@@ -45,10 +47,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.7
+    - name: Set up Python 3.8
       uses: actions/setup-python@v5
       with:
-        python-version: 3.7
+        python-version: 3.8
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/pyproject.toml b/pyproject.toml
index 9e309b81..be911599 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,9 +36,9 @@ keywords = [
 ]
 
 dependencies = [
-    "numpy>=1.17.4",
+    "numpy>=1.22,<2", # Cannot use 2.0 due to matplotlib version pinning.
     "scipy",
-    "matplotlib",
+    "matplotlib==3.5.1", # Large user-base has apt-installed python3-matplotlib (ROS2) which is pinned to this version.
     "ansitable",
     "typing_extensions",
     "pre-commit",