diff --git a/packages/frontend/src/components/MkMfmWindow.vue b/packages/frontend/src/components/MkMfmWindow.vue
index a55f814db..c3969ff99 100644
--- a/packages/frontend/src/components/MkMfmWindow.vue
+++ b/packages/frontend/src/components/MkMfmWindow.vue
@@ -10,7 +10,7 @@
 		MFM Cheatsheet
 	</template>
     <MkStickyContainer>
-		<MkSpacer :content-max="800">
+		<MkSpacer :contentMax="800">
 			<div class="mfm-cheat-sheet">
 				<div>{{ i18n.ts._mfm.intro }}</div>
 				<br />
@@ -470,4 +470,4 @@ const preview_plain = ref(
 		}
 	}
 }
-</style>
\ No newline at end of file
+</style>