diff --git a/app/layout.tsx b/app/layout.tsx
index b64665e..0c41a12 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -28,7 +28,7 @@ export const metadata: Metadata = {
     siteName: "MycoFi",
     images: [
       {
-        url: "/og-image.jpg",
+        url: "/og-image.png",
         width: 1200,
         height: 630,
         alt: "MycoFi - Regenerative Economics",
@@ -41,7 +41,7 @@ export const metadata: Metadata = {
     card: "summary_large_image",
     title: "MycoFi - Mycoeconomics & Permaculture Currencies",
     description: "Exploring regenerative economic systems inspired by mycelial networks and nature's resource allocation algorithms",
-    images: ["/og-image.jpg"],
+    images: ["/og-image.png"],
   },
 }
 
diff --git a/components/header.tsx b/components/header.tsx
index 36cd0a2..59c189b 100644
--- a/components/header.tsx
+++ b/components/header.tsx
@@ -8,7 +8,7 @@ export function Header() {
       <div className="container flex h-16 items-center justify-between px-4">
         <Link href="/" className="flex items-center gap-3">
           <Image
-            src="/mycofi-logo.jpg"
+            src="/mycofi-logo.png"
             alt="MycoFi Logo"
             width={40}
             height={40}
diff --git a/docker-compose.yml b/docker-compose.yml
index e8da0e8..ceffa65 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,6 +6,13 @@ services:
     image: mycofi-earth-website:latest
     container_name: mycofi-earth-website
     restart: unless-stopped
+    read_only: true
+    tmpfs:
+      - /tmp
+    cap_drop:
+      - ALL
+    security_opt:
+      - no-new-privileges:true
     environment:
       - NODE_ENV=production
       - HOSTNAME=0.0.0.0
diff --git a/public/mycofi-logo.jpg b/public/mycofi-logo.jpg
deleted file mode 100644
index 21961b7..0000000
Binary files a/public/mycofi-logo.jpg and /dev/null differ
diff --git a/public/mycofi-logo.png b/public/mycofi-logo.png
new file mode 100644
index 0000000..a3fcd63
Binary files /dev/null and b/public/mycofi-logo.png differ
diff --git a/public/og-image.jpg b/public/og-image.jpg
deleted file mode 100644
index 9b28580..0000000
Binary files a/public/og-image.jpg and /dev/null differ
diff --git a/public/og-image.png b/public/og-image.png
new file mode 100644
index 0000000..bb8f367
Binary files /dev/null and b/public/og-image.png differ