diff --git a/packages/standard-components/src/Card.Svelte b/packages/standard-components/src/Card.Svelte
index 1d811dcbb..b62ace732 100644
--- a/packages/standard-components/src/Card.Svelte
+++ b/packages/standard-components/src/Card.Svelte
@@ -1,7 +1,7 @@
 <script>
   import { cssVars, createClasses } from "./cssVars"
 
-  export let className = ""
+  export const className = ""
   export let imageUrl = ""
   export let heading = ""
   export let description = ""
diff --git a/packages/standard-components/src/CardHorizontal.Svelte b/packages/standard-components/src/CardHorizontal.Svelte
index 492c794c2..86dc6437e 100644
--- a/packages/standard-components/src/CardHorizontal.Svelte
+++ b/packages/standard-components/src/CardHorizontal.Svelte
@@ -1,7 +1,7 @@
 <script>
   import { cssVars, createClasses } from "./cssVars"
 
-  export let className = ""
+  export const className = ""
   export let imageUrl = ""
   export let heading = ""
   export let description = ""