diff --git a/ext/bg/js/mecab.js b/ext/bg/js/mecab.js
index 4c62c2b0..b9f2d0b3 100644
--- a/ext/bg/js/mecab.js
+++ b/ext/bg/js/mecab.js
@@ -58,12 +58,10 @@ class Mecab {
             const sequence = this.sequence++;
 
             this.listeners[sequence] = {
-                callback: (data) => {
-                    resolve(data);
-                },
+                callback: resolve,
                 timer: setTimeout(() => {
                     delete this.listeners[sequence];
-                    reject(`Mecab invoke timed out in ${Mecab.timeout} ms`);
+                    reject(new Error(`Mecab invoke timed out in ${Mecab.timeout} ms`));
                 }, Mecab.timeout)
             }
 
diff --git a/ext/bg/js/search-query-parser.js b/ext/bg/js/search-query-parser.js
index f8e53963..2aee45dd 100644
--- a/ext/bg/js/search-query-parser.js
+++ b/ext/bg/js/search-query-parser.js
@@ -97,8 +97,8 @@ class QueryParser {
             }
         }
 
-        const contents = await Promise.all(Object.values(results).map(async result => {
-            return await apiTemplateRender('query-parser.html', {
+        const contents = await Promise.all(Object.values(results).map(result => {
+            return apiTemplateRender('query-parser.html', {
                 terms: result.map((term) => {
                     return term.filter(part => part.text.trim()).map((part) => {
                         return {