diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a5226b7..cd5df204 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-15, windows-latest]
         python-version: ["3.10", "3.11", "3.12", "3.13"]
+        opencv-version: ["4", "5"]
 
     steps:
       - uses: actions/checkout@v7
@@ -30,6 +31,7 @@ jobs:
       - name: Install package
         run: |
           pip install .[dev,tool]
+          pip install "opencv-python==${{ matrix.opencv-version }}.*" "opencv-contrib-python==${{ matrix.opencv-version }}.*"
           cd packages/mvtb-data && pip install .
 
       - name: Run tests
diff --git a/pyproject.toml b/pyproject.toml
index 710a2a2e..b270e657 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,8 +39,8 @@ dependencies = [
     "scipy",
     "matplotlib",
     "pillow",
-    "opencv-python<5.0.0",
-    "opencv-contrib-python<5.0.0",
+    "opencv-python>=4.5,<6.0.0",
+    "opencv-contrib-python>=4.5,<6.0.0",
     "spatialmath-python",
     "pgraph-python",
     "ansitable",