diff --git a/package.json b/package.json
index 4b55046c31..8942b2426f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "12.118.1-calc.9.3",
+	"version": "12.118.1-calc.9.4",
 	"codename": "aqua",
 	"repository": {
 		"type": "git",
diff --git a/packages/client/src/ui/universal.vue b/packages/client/src/ui/universal.vue
index d135e552be..e026b4562a 100644
--- a/packages/client/src/ui/universal.vue
+++ b/packages/client/src/ui/universal.vue
@@ -25,7 +25,7 @@
 		<button class="button widget _button" @click="widgetsShowing = true"><i class="fas fa-layer-group"></i></button>
 	</div>
 
-	<button v-if="isMobile" class="postButton button post _button" @click="os.post()"><i class="fas fa-pencil-alt"></i></button>
+	<button v-if="isMobile" id="postButton" class="postButton button post _button" @click="os.post()"><i class="fas fa-pencil-alt"></i></button>
 
 	<transition :name="$store.state.animation ? 'menuDrawer-back' : ''">
 		<div
@@ -172,7 +172,7 @@ function top() {
 }
 
 let scrollPos = 0;
-const postButton = document.querySelector<HTMLElement>('.postButton');
+const postButton = document.getElementById('postButton');
 
 function checkPosition() {
 	let windowY = window.scrollY;