diff --git a/README.md b/README.md
index 85db54c..24085c1 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # eleventy-document-outline
 
+> [!IMPORTANT] Requires Eleventy 3.0.0-alpha.15 or higher.
+
 Creates a list of anchors to linkable headers.
 
 ## Installation
diff --git a/deno.json b/deno.json
index 5256563..c5935bc 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,6 @@
 {
   "name": "@vrugtehagel/eleventy-document-outline",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "exports": "./mod.ts",
   "publish": {
     "include": ["src/**", "mod.ts", "README.md"]