diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index d28d93f..7a61a17 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,6 +1,17 @@
 Release Notes
 =============
 
+v1.0.0-alpha.11
+---------------
+
+## Breaking changes
+
+- Generate Trait and Specification view classes using `v1.0.0a10` of
+  `openassetio-traitgen`, which reverts the use of `frozenset`s for the
+  static `kTraitSet` member on Specification view classes in Python. The
+  `kTraitSet` member is once again a plain `set`.
+  [OpenAssetIO-TraitGen#94](https://github.com/OpenAssetIO/OpenAssetIO-TraitGen/issues/94)
+
 v1.0.0-alpha.10
 ---------------
 
diff --git a/pyproject.toml b/pyproject.toml
index 390d694..0169da5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@
 [build-system]
 requires = [
     "setuptools>=65.5.0",
-    "openassetio-traitgen==1.0.0a10"
+    "openassetio-traitgen==1.0.0a11"
 ]
 build-backend = "setuptools.build_meta"