diff --git a/packages/client/src/components/MkPostForm.vue b/packages/client/src/components/MkPostForm.vue
index cfc3cc9f2a..cecd4c483e 100644
--- a/packages/client/src/components/MkPostForm.vue
+++ b/packages/client/src/components/MkPostForm.vue
@@ -1233,6 +1233,7 @@ onMounted(() => {
 		}
 
 		nextTick(() => watchForDraft());
+		nextTick(() => autosize.update(textareaEl.value));
 	});
 });
 </script>