diff --git a/pyproject.toml b/pyproject.toml
index 01f8e041..c836efa2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,8 @@ dependencies = [
     "lazy_loader",
     "matplotlib       >= 3.5",
     "numba            >= 0.57",
-    "numpy            >= 1.23.0",
+    # TODO: Remove pinning of NumPy <2 once HyperSpy 2.0 is supported
+    "numpy            >= 1.23.0, <2",
     "orix             >= 0.12.1",
     "pooch            >= 1.3.0",
     "pyyaml",