diff --git a/ChangeLog b/ChangeLog
index be8d9800..4d6b8b5e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2024-06-07  Jay Berkenbilt  <ejb@ql.org>
+
+	* 11.9.1: release
+
+2024-06-06  Jay Berkenbilt  <ejb@ql.org>
+
+	* Rewrite a recursive function to be iterative in linearization to
+	enable more complex files to be linearized, especially on Windows.
+
+2024-02-24  Jay Berkenbilt  <ejb@ql.org>
+
+	* Avoid non-standard use of `std::basic_string_view`. Contribution
+	from Zoe Clifford.
+
 2024-02-24  Jay Berkenbilt  <ejb@ql.org>
 
 	* 11.9.0: release
diff --git a/manual/release-notes.rst b/manual/release-notes.rst
index dcf0a43d..c8f37196 100644
--- a/manual/release-notes.rst
+++ b/manual/release-notes.rst
@@ -38,6 +38,23 @@ Planned changes for future 12.x (subject to change):
 
 .. x.y.z: not yet released
 
+11.9.1: June 7, 2024
+  - Bug Fixes
+
+    - Rework one piece of linearization to avoid potential stack
+      overflow on very complex files
+
+  - Build Improvements
+
+    - Add a CLion build configuration for building with static
+      libraries with Visual C++ on Windows. This configuration works
+      "out of the box" with CLion, Visual C++, and the external
+      libraries binary distribution without any additoinal external
+      tools.
+
+    - Tweak use of ``std::string_view`` to handle upcoming changes to
+      the C++ standard.
+
 11.9.0: February 24, 2024
   - CLI Enhancements