diff --git a/pyproject.toml b/pyproject.toml
index 5f52963b..aa85208b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
   "labthings-fastapi==0.0.14",
   "sangaboard",
   "camera-stage-mapping ~= 0.1.10",
-  "opencv-python ~= 4.11.0",
+  "opencv-python-headless ~= 4.13.0",
   "openflexure-stitching[libvips]==0.2.3",
   "pillow ~= 10.4",
   "anyio ~= 4.0",