diff --git a/.stylelintrc.json b/.stylelintrc.json
index 263fbd63..86751515 100644
--- a/.stylelintrc.json
+++ b/.stylelintrc.json
@@ -5,6 +5,13 @@
     "stylelint-config-prettier"
   ],
   "rules": {
+    "selector-pseudo-class-no-unknown": [
+      true,
+      {
+        "ignorePseudoClasses": ["deep"]
+      }
+    ],
+    "selector-class-pattern": "^(([a-z][a-zA-Z0-9_]+)|([a-z][a-z0-9]*)(-[a-zA-Z0-9_]+)*)$"
   },
   "overrides": [
     {
diff --git a/src/renderer/components/Authorize.vue b/src/renderer/components/Authorize.vue
index b71fdca6..9539b4c8 100644
--- a/src/renderer/components/Authorize.vue
+++ b/src/renderer/components/Authorize.vue
@@ -33,7 +33,13 @@
             <el-input></el-input>
           </el-form-item>
           <el-form-item class="submit">
-            <el-button type="primary" @click="authorizeSubmit" v-loading="submitting" element-loading-background="rgba(0, 0, 0, 0.8)">
+            <el-button
+              v-loading="submitting"
+              type="primary"
+              class="authorize"
+              element-loading-background="rgba(0, 0, 0, 0.8)"
+              @click="authorizeSubmit"
+            >
               {{ $t('authorize.submit') }}
             </el-button>
           </el-form-item>
@@ -125,7 +131,7 @@ export default defineComponent({
 <style lang="scss" scoped>
 #authorize {
   background-color: #292f3f;
-  color: #ffffff;
+  color: #fff;
   text-align: center;
   min-height: 100%;
 
@@ -150,6 +156,10 @@ export default defineComponent({
   .authorize-form {
     width: 500px;
     margin: 0 auto;
+
+    .authorize {
+      margin: 0 auto;
+    }
   }
 
   .authorize-form :deep() {
@@ -159,9 +169,13 @@ export default defineComponent({
 
     .el-input__inner {
       background-color: #373d48;
-      color: #ffffff;
+      color: #fff;
       border: 0;
     }
+
+    .el-input__wrapper {
+      background-color: #373d48;
+    }
   }
 
   .hidden {
diff --git a/src/renderer/components/Login/LoginForm.vue b/src/renderer/components/Login/LoginForm.vue
index 1c0dd836..cef7f005 100644
--- a/src/renderer/components/Login/LoginForm.vue
+++ b/src/renderer/components/Login/LoginForm.vue
@@ -196,5 +196,9 @@ export default defineComponent({
     color: #fff;
     box-shadow: none;
   }
+
+  .el-input__wrapper {
+    background-color: #373d48;
+  }
 }
 </style>
diff --git a/src/renderer/store/TimelineSpace.ts b/src/renderer/store/TimelineSpace.ts
index b37dabdf..e147f068 100644
--- a/src/renderer/store/TimelineSpace.ts
+++ b/src/renderer/store/TimelineSpace.ts
@@ -241,7 +241,12 @@ const actions: ActionTree<TimelineSpaceState, RootState> = {
   [ACTION_TYPES.FETCH_INSTANCE]: async ({ commit, state }, account: LocalAccount) => {
     const client = generator(state.sns, account.baseURL, null, 'Whalebird')
     const res = await client.getInstance()
-    commit(MUTATION_TYPES.UPDATE_TOOT_MAX, res.data.max_toot_chars)
+    if (res.data.max_toot_chars) {
+      commit(MUTATION_TYPES.UPDATE_TOOT_MAX, res.data.max_toot_chars)
+    }
+    if (res.data.configuration) {
+      commit(MUTATION_TYPES.UPDATE_TOOT_MAX, res.data.configuration.statuses.max_characters)
+    }
     return true
   },
   [ACTION_TYPES.LOAD_TIMELINE_SETTING]: async ({ commit }, accountID: string) => {