diff --git a/lib/logger.js b/lib/logger.js
index 2af703f..dbfd786 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -1,17 +1,14 @@
 /* eslint no-underscore-dangle:0 */
-
-
-
-const debug = require('debug')('log4js:logger');
-const LoggingEvent = require('./LoggingEvent');
-const levels = require('./levels');
-const clustering = require('./clustering');
-const categories = require('./categories');
-const configuration = require('./configuration');
+const debug = require("debug")("log4js:logger");
+const LoggingEvent = require("./LoggingEvent");
+const levels = require("./levels");
+const clustering = require("./clustering");
+const categories = require("./categories");
+const configuration = require("./configuration");
 
 const stackReg = /at (?:(.+)\s+\()?(?:(.+?):(\d+)(?::(\d+))?|([^)]+))\)?/;
 function defaultParseCallStack(data, skipIdx = 4) {
-  const stacklines = data.stack.split('\n').slice(skipIdx);
+  const stacklines = data.stack.split("\n").slice(skipIdx);
   const lineMatch = stackReg.exec(stacklines[0]);
   if (lineMatch && lineMatch.length === 6) {
     return {
@@ -19,7 +16,7 @@ function defaultParseCallStack(data, skipIdx = 4) {
       fileName: lineMatch[2],
       lineNumber: parseInt(lineMatch[3], 10),
       columnNumber: parseInt(lineMatch[4], 10),
-      callStack: stacklines.join('\n'),
+      callStack: stacklines.join("\n")
     };
   }
   return null;
@@ -40,7 +37,7 @@ function defaultParseCallStack(data, skipIdx = 4) {
 class Logger {
   constructor(name) {
     if (!name) {
-      throw new Error('No category provided.');
+      throw new Error("No category provided.");
     }
     this.category = name;
     this.context = {};
@@ -49,11 +46,17 @@ class Logger {
   }
 
   get level() {
-    return levels.getLevel(categories.getLevelForCategory(this.category), levels.TRACE);
+    return levels.getLevel(
+      categories.getLevelForCategory(this.category),
+      levels.TRACE
+    );
   }
 
   set level(level) {
-    categories.setLevelForCategory(this.category, levels.getLevel(level, this.level));
+    categories.setLevelForCategory(
+      this.category,
+      levels.getLevel(level, this.level)
+    );
   }
 
   get useCallStack() {
@@ -61,7 +64,7 @@ class Logger {
   }
 
   set useCallStack(bool) {
-    categories.setEnableCallStackForCategory(this.category, (bool === true));
+    categories.setEnableCallStackForCategory(this.category, bool === true);
   }
 
   log(level, ...args) {
@@ -82,7 +85,7 @@ class Logger {
       level,
       data,
       this.context,
-      (this.useCallStack) && this.parseCallStack(new Error())
+      this.useCallStack && this.parseCallStack(new Error())
     );
     clustering.send(loggingEvent);
   }
@@ -108,14 +111,16 @@ function addLevelMethods(target) {
   const level = levels.getLevel(target);
 
   const levelStrLower = level.toString().toLowerCase();
-  const levelMethod = levelStrLower.replace(/_([a-z])/g, g => g[1].toUpperCase());
+  const levelMethod = levelStrLower.replace(/_([a-z])/g, g =>
+    g[1].toUpperCase()
+  );
   const isLevelMethod = levelMethod[0].toUpperCase() + levelMethod.slice(1);
 
-  Logger.prototype[`is${isLevelMethod}Enabled`] = function () {
+  Logger.prototype[`is${isLevelMethod}Enabled`] = function() {
     return this.isLevelEnabled(level);
   };
 
-  Logger.prototype[levelMethod] = function (...args) {
+  Logger.prototype[levelMethod] = function(...args) {
     this.log(level, ...args);
   };
 }