diff --git a/src/components/Header.tsx b/src/components/Header.tsx
index 65dd7c6..f0ce574 100644
--- a/src/components/Header.tsx
+++ b/src/components/Header.tsx
@@ -33,7 +33,7 @@ const Header = () => {
           <NavbarLogo href="#">
             <Logo width={30} height={30} />
             <span className="font-display text-lg font-medium tracking-tight">
-              Webklar
+              WEBklar
             </span>
           </NavbarLogo>
           <NavItems items={navItems} />
@@ -60,7 +60,7 @@ const Header = () => {
             <NavbarLogo href="#">
               <Logo width={30} height={30} />
               <span className="font-display text-lg font-medium tracking-tight">
-                Webklar
+                WEBklar
               </span>
             </NavbarLogo>
             <div className="flex items-center gap-2">
diff --git a/src/pages/AGB.tsx b/src/pages/AGB.tsx
index d6bf83b..6be0925 100644
--- a/src/pages/AGB.tsx
+++ b/src/pages/AGB.tsx
@@ -15,7 +15,7 @@ const AGB = () => {
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
               <span className="text-xl font-display font-medium text-foreground tracking-tight">
-                Webklar
+                WEBklar
               </span>
             </Link>
             <Link to="/">
diff --git a/src/pages/About.tsx b/src/pages/About.tsx
index c8fa38f..6025d32 100644
--- a/src/pages/About.tsx
+++ b/src/pages/About.tsx
@@ -19,7 +19,7 @@ const About = () => {
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
               <span className="text-xl font-display font-medium text-foreground tracking-tight">
-                Webklar
+                WEBklar
               </span>
             </Link>
             <Link to="/">
diff --git a/src/pages/Contact.tsx b/src/pages/Contact.tsx
index 8e233ab..37f60ca 100644
--- a/src/pages/Contact.tsx
+++ b/src/pages/Contact.tsx
@@ -65,7 +65,7 @@ const Contact = () => {
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
               <span className="text-xl font-display font-medium text-foreground tracking-tight">
-                Webklar
+                WEBklar
               </span>
             </Link>
             <Link to="/">
diff --git a/src/pages/HostingAbo.tsx b/src/pages/HostingAbo.tsx
index fbe9352..34ff91a 100644
--- a/src/pages/HostingAbo.tsx
+++ b/src/pages/HostingAbo.tsx
@@ -34,7 +34,7 @@ const HostingAbo = () => {
         <div className="container mx-auto px-6">
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
-              <span className="text-xl font-display font-medium text-foreground tracking-tight">Webklar</span>
+              <span className="text-xl font-display font-medium text-foreground tracking-tight">WEBklar</span>
             </Link>
             <Button asChild variant="ghost" className="text-muted-foreground hover:text-foreground">
               <Link to="/">
diff --git a/src/pages/Impressum.tsx b/src/pages/Impressum.tsx
index d5512e3..7bda1e1 100644
--- a/src/pages/Impressum.tsx
+++ b/src/pages/Impressum.tsx
@@ -15,7 +15,7 @@ const Impressum = () => {
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
               <span className="text-xl font-display font-medium text-foreground tracking-tight">
-                Webklar
+                WEBklar
               </span>
             </Link>
             <Link to="/">
diff --git a/src/pages/WartungsAbo.tsx b/src/pages/WartungsAbo.tsx
index ff2af69..dcad046 100644
--- a/src/pages/WartungsAbo.tsx
+++ b/src/pages/WartungsAbo.tsx
@@ -34,7 +34,7 @@ const WartungsAbo = () => {
         <div className="container mx-auto px-6">
           <div className="flex items-center justify-between">
             <Link to="/" className="flex items-center gap-2 group">
-              <span className="text-xl font-display font-medium text-foreground tracking-tight">Webklar</span>
+              <span className="text-xl font-display font-medium text-foreground tracking-tight">WEBklar</span>
             </Link>
             <Button asChild variant="ghost" className="text-muted-foreground hover:text-foreground">
               <Link to="/">
diff --git a/src/test/sofort-paket.test.tsx b/src/test/sofort-paket.test.tsx
index f0e0b71..09c6c22 100644
--- a/src/test/sofort-paket.test.tsx
+++ b/src/test/sofort-paket.test.tsx
@@ -350,3 +350,19 @@ describe("C5 404-Seite", () => {
     }
   });
 });
+
+describe("C4 Schreibweise WEBklar", () => {
+  it("kein sichtbares »Webklar« mehr im Quelltext (URLs, Mailadressen und Kleinschreibung ausgenommen)", () => {
+    expect(vorkommen(/(?<![\w./@:-])Webklar(?![\w@.-])/)).toEqual([]);
+  });
+
+  it.each(["/", "/kontakt", "/ueber-uns", "/agb", "/impressum", "/wartungs-abo", "/hosting-abo", "/gibt-es-nicht"])(
+    "%s: die Marke steht als WEBklar da",
+    (pfad) => {
+      vi.spyOn(console, "error").mockImplementation(() => {});
+      seite(pfad);
+      expect(screen.queryAllByText(/Webklar/)).toHaveLength(0);
+      expect(screen.getAllByText("WEBklar").length).toBeGreaterThan(0);
+    },
+  );
+});