diff --git a/src/panels/lovelace/cards/hui-markdown-card.ts b/src/panels/lovelace/cards/hui-markdown-card.ts
index 0f91a15b344a..d03a9cd45da6 100644
--- a/src/panels/lovelace/cards/hui-markdown-card.ts
+++ b/src/panels/lovelace/cards/hui-markdown-card.ts
@@ -135,6 +135,7 @@ export class HuiMarkdownCard extends LitElement implements LovelaceCard {
             config: this._config,
             user: this.hass.user!.name,
           },
+          strict: true,
         }
       );
     } catch (_err) {