diff --git a/docs/upgrade-guides/2-1-0-to-2-2-0.md b/docs/upgrade-guides/2-1-0-to-2-2-0.md
new file mode 100644
index 0000000..de5540d
--- /dev/null
+++ b/docs/upgrade-guides/2-1-0-to-2-2-0.md
@@ -0,0 +1,7 @@
+# 2.1.0 to 2.2.0
+
+This document describes the upgrade instructions from `2.1.0` to `2.2.0`.
+
+## PUBLIC_AERIE_FILE_STORE_PREFIX environment variable
+
+Aerie UI now provides an environment variable to specify a naming convention for simulation configuration files that are uploaded. UI environment variables are docuemented in [ENVIRONMENT.md](https://github.com/NASA-AMMOS/aerie-ui/blob/develop/docs/ENVIRONMENT.md).
diff --git a/sidebars.js b/sidebars.js
index f75acdd..1806ed3 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -292,6 +292,7 @@ const sidebars = {
     'glossary',
   ],
   upgradeGuides: [
+    'upgrade-guides/2-1-0-to-2-2-0',
     'upgrade-guides/2-0-0-to-2-1-0',
     'upgrade-guides/1-14-0-to-2-0-0',
     'upgrade-guides/1-13-0-to-1-14-0',