diff --git a/package.json b/package.json
index 7a0c6e5..f29ede9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "astro-gemtext",
     "homepage": "https://github.com/aspizu/astro-gemtext",
-    "version": "0.3.0",
+    "version": "0.3.1",
     "type": "module",
     "main": "dist/index.js",
     "types": "dist/index.d.ts",
diff --git a/src/index.ts b/src/index.ts
index beacb56..83db082 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,6 +24,9 @@ type SetupHookParams = HookParameters<"astro:config:setup"> & {
 }
 
 export default function gemtext(config: GemtextConfig = {}): AstroIntegration {
+    if (!config.titleFormat) {
+        config.titleFormat = "first-heading"
+    }
     return {
         name: "astro-gemtext",
         hooks: {