diff --git a/templates/Message.tsx b/templates/Message.tsx
index 72fd87a..bcd99df 100644
--- a/templates/Message.tsx
+++ b/templates/Message.tsx
@@ -17,7 +17,7 @@ function Message(
 	)
 }
 
-const template: Template = {
+const template: Template<typeof Message, Parameters<typeof Message>[0]> = {
 	props: [
 		{
 			name: 'Résumé',
diff --git a/types.ts b/types.ts
index 24556b1..4956a4a 100644
--- a/types.ts
+++ b/types.ts
@@ -1,4 +1,4 @@
-import type { FunctionComponent, JSX } from 'preact'
+import type { JSX } from 'preact'
 import type { Contact } from './src/contact.ts'
 
 export type Mail = {
@@ -14,7 +14,7 @@ export type Mail = {
 }
 
 export type Template<
-	T extends FunctionComponent<P>,
+	T extends (props: P) => JSX.Element,
 	P extends Record<string, unknown>,
 > = {
 	name: string
@@ -25,6 +25,6 @@ export type Template<
 		description: string
 		required: boolean
 		multiline: boolean
-		tag: P
+		tag: keyof P
 	}[]
 }