diff --git a/docs/upgrade-guides/4-1-0-to-4-1-1.md b/docs/upgrade-guides/4-1-0-to-4-1-1.md
new file mode 100644
index 0000000..a5893c4
--- /dev/null
+++ b/docs/upgrade-guides/4-1-0-to-4-1-1.md
@@ -0,0 +1,7 @@
+# 4.1.0 to 4.1.1
+
+No special upgrade instructions are necessary for PlanDev.
+
+### SeqDev: SeqN language improvements
+
+For SeqDev users, this release includes a new release of the [aerie-sequence-languages](https://github.com/NASA-AMMOS/aerie-sequence-languages) library ([**v1.0.2**](https://github.com/NASA-AMMOS/aerie-sequence-languages/releases/tag/v1.0.2)) with fixes for known issues. Users with **custom sequencing adaptations** should update this library and rebuild/reupload their adaptation.
diff --git a/sidebars.js b/sidebars.js
index b0b8738..e15be76 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -518,6 +518,7 @@ const sidebars = {
     },
   ],
   upgradeGuides: [
+    'upgrade-guides/4-1-0-to-4-1-1',
     'upgrade-guides/4-0-0-to-4-1-0',
     'upgrade-guides/3-8-1-to-4-0-0',
     'upgrade-guides/3-8-0-to-3-8-1',