diff --git a/pyproject.toml b/pyproject.toml
index 225e4ed7..ddaf69f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,24 +7,24 @@ requires-python = ">=3.11"
 dependencies = [
     "uv",
     "gunicorn",
-    "aarecommon>=0.2.0",
-    "pydantic==2.11.4",
-    "numpy==2.2.5",
+    "aarecommon>=0.2.2",
+    "pydantic>=2.11",
+    "numpy",
     "jfjoch_client==1.0.0rc146",
-    "pyJWT==2.10.1",
-    "pyzmq==26.4.0",
-    "opencv-python-headless==4.11.0.86",
+    "pyJWT",
+    "pyzmq",
+    "opencv-python-headless",
     "PySide6==6.9.0",
-    "requests==2.32.4",
-    "pyepics==3.5.8",
-    "redis==6.2.0",
-    "python-redis-lock==4.0.0",
-    "fastapi==0.115.13",
+    "requests",
+    "pyepics~=3.5",
+    "redis",
+    "python-redis-lock",
+    "fastapi",
     "uvicorn",
     "aaredb>=0.2",
-    "python_multipart==0.0.20",
-    "websocket-client==1.8.0",
-    "sseclient==0.0.27", #Was sseclient-py==1.8.0 but this was broken???
+    "python_multipart",
+    "websocket-client",
+    "sseclient",
     "psi-pshell==2.1.0",
     "bec_lib>=3.130.3",
     "bec-ipython-client>=3.130.3",
@@ -53,6 +53,19 @@ docs = [
 [lint]
 ignore = ["F401", "F541", "W503", "W504"]
 
+[tool.uv]
+# Transitive deps (aarecommon -> aarelc_infer) ask for the non-headless
+# `opencv-python`. It unpacks into the same `cv2/` directory as the
+# `opencv-python-headless` we depend on, so whichever installs last wins for the
+# overlapping files and you get a mixed install -- the Python half of one wheel
+# next to the native half of the other. That surfaces as
+# `AttributeError: partially initialized module 'cv2' has no attribute
+# 'gapi_wip_gst_GStreamerPipeline'` on `import cv2`, and it bites in the
+# test-with-beamline-plugins job because installing the plugins re-resolves and
+# flips the install order. A marker that never matches drops the requirement,
+# leaving headless as the only cv2 provider.
+override-dependencies = ["opencv-python; sys_platform == 'nonexistent'"]
+
 [tool.uv.sources]
 aaredb = { index = "psi"}