diff --git a/src/components/cards/cardBlog.tsx b/src/components/cards/cardBlog.tsx
index 54545d9..7508ed8 100644
--- a/src/components/cards/cardBlog.tsx
+++ b/src/components/cards/cardBlog.tsx
@@ -1,13 +1,10 @@
 import { Button } from "@/components/ui/button";
 import Link from "next/link";
 import getSession from "@/lib/session";
+import { Session, CardBlogProps } from "@/lib/types";
+
+
 
-type CardBlogProps = {
-  title: string;
-  description: string;
-  date: string;
-  slug: string;
-};
 
 export default async function CardBlog({
   title,
@@ -15,7 +12,7 @@ export default async function CardBlog({
   date,
   slug,
 }: CardBlogProps) {
-  const session = await getSession();
+  const session: Session = await getSession();
 
   return (
     <>
diff --git a/src/components/layout/header.tsx b/src/components/layout/header.tsx
index aba9bdb..fbe17c0 100644
--- a/src/components/layout/header.tsx
+++ b/src/components/layout/header.tsx
@@ -3,37 +3,36 @@ import { Avatar, AvatarImage } from "@/components/ui/avatar";
 import { Button } from "@/components/ui/button";
 import Link from "next/link";
 import getSession from "@/lib/session";
-
-
+import { Session } from "@/lib/types";
 
 export default async function Header() {
-  const session = await getSession();
+  const session: Session = await getSession();
   return (
     <header className="flex flex-row justify-between items-center">
       <h1 className="text-2xl font-bold">Weekly Journal Nicolas'</h1>
       <div className="flex flex-row gap-4">
-      {!session && (
-        <LoginGithubButton />
-      )}
+        {!session && (
+          <LoginGithubButton />
+        )}
 
-      {session && (
-        <>
-        <div className="flex flex-row gap-4">
-          <Avatar className="border-2 border-gray-200">
-            <AvatarImage src={session.user.image} />
-          </Avatar>
-          <LogoutButton />
-          {session.user.isAdmin && (
-            <Link href="/blog/create">
-            <Button> 
-            Add Post
-            </Button>
-          </Link>
-          )}
-        </div>
-        </>
-      )}
+        {session && (
+          <>
+            <div className="flex flex-row gap-4">
+              <Avatar className="border-2 border-gray-200">
+                <AvatarImage src={session?.user?.image} />
+              </Avatar>
+              <LogoutButton />
+              {session?.user?.isAdmin && (
+                <Link href="/blog/create">
+                  <Button>
+                    Add Post
+                  </Button>
+                </Link>
+              )}
+            </div>
+          </>
+        )}
       </div>
     </header>
   );
-}
\ No newline at end of file
+}
diff --git a/src/lib/session.ts b/src/lib/session.ts
index 2300337..fc3c122 100644
--- a/src/lib/session.ts
+++ b/src/lib/session.ts
@@ -1,7 +1,9 @@
 import { auth } from "@/lib/auth"
+import { User } from "next-auth";
+import { Session } from "@/lib/types";
 
-export default async function getSession() {
+export default async function getSession(): Promise<Session> {
   const session = await auth()
-  
+
   return session
 }
\ No newline at end of file
diff --git a/src/lib/types.d.ts b/src/lib/types.d.ts
new file mode 100644
index 0000000..7120d49
--- /dev/null
+++ b/src/lib/types.d.ts
@@ -0,0 +1,16 @@
+// types.d.ts or in your component file
+export type User = {
+  isAdmin?: boolean;
+  image?: string;
+};
+
+export type Session = {
+  user?: User;
+};
+
+export type CardBlogProps = {
+  title: string;
+  description: string;
+  date: string;
+  slug: string;
+};