diff --git a/pyproject.toml b/pyproject.toml
index 8bb14eff26..96974a2d60 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
     "opencv-python-headless", # For pin-tip detection.
     "aioca",                  # Required for CA support with ophyd-async.
     "p4p",                    # Required for PVA support with ophyd-async.
-    "numpy<2.0",              # Unpin when https://github.com/bluesky/ophyd-async/issues/387 resolved
+    "numpy<3.0",              # Unpin when https://github.com/bluesky/ophyd-async/issues/387 resolved
     "aiofiles",
     "aiohttp",
     "redis",
@@ -59,7 +59,7 @@ dev = [
     "pytest-cov",
     "pytest-random-order",
     "ruff",
-    "sphinx<7.4.6",              #  pinned due to https://github.com/sphinx-doc/sphinx/issues/12660
+    "sphinx<8.1.4",              #  pinned due to https://github.com/sphinx-doc/sphinx/issues/12660
     "sphinx-autobuild",
     "sphinx-copybutton",
     "sphinxcontrib-mermaid",