diff --git a/lib/God/ForkMode.js b/lib/God/ForkMode.js
index 32ca27c6..dc883de1 100644
--- a/lib/God/ForkMode.js
+++ b/lib/God/ForkMode.js
@@ -14,7 +14,7 @@ var log           = require('debug')('pm2:fork_mode');
 var fs            = require('fs');
 var Utility       = require('../Utility.js');
 var path          = require('path');
-var dateFns = require('date-fns')
+var dayjs         = require('dayjs');
 var semver  = require('semver')
 
 /**
@@ -134,7 +134,7 @@ module.exports = function ForkMode(God) {
       function transformLogToJson(pm2_env, type, data) {
         return JSON.stringify({
           message : data.toString(),
-          timestamp : pm2_env.log_date_format ? dateFns.format(Date.now(), pm2_env.log_date_format) : new Date().toISOString(),
+          timestamp : pm2_env.log_date_format ? dayjs().format(pm2_env.log_date_format) : new Date().toISOString(),
           type : type,
           process_id : cspr.pm2_env.pm_id,
           app_name : cspr.pm2_env.name
@@ -146,7 +146,7 @@ module.exports = function ForkMode(God) {
         log_data = data.toString().split('\n')
         if (log_data.length > 1)
           log_data.pop()
-        log_data = log_data.map(line => `${dateFns.format(Date.now(), pm2_env.log_date_format)}: ${line}\n`)
+        log_data = log_data.map(line => `${dayjs().format(pm2_env.log_date_format)}: ${line}\n`)
         log_data = log_data.join('')
         return log_data
       }
diff --git a/lib/ProcessContainer.js b/lib/ProcessContainer.js
index 4ae92db1..b273bfb7 100644
--- a/lib/ProcessContainer.js
+++ b/lib/ProcessContainer.js
@@ -150,10 +150,10 @@ function exec(script, stds) {
     }
   });
 
-  var dateFns = null;
+  var dayjs = null;
 
   if (pm2_env.log_date_format)
-    dateFns = require('date-fns');
+    dayjs = require('dayjs');
 
   Utility.startLogging(stds, function (err) {
     if (err) {
@@ -180,15 +180,15 @@ function exec(script, stds) {
         if (pm2_env.log_type && pm2_env.log_type === 'json') {
           log_data = JSON.stringify({
             message : string.toString(),
-            timestamp : pm2_env.log_date_format && dateFns ?
-              dateFns.format(Date.now(), pm2_env.log_date_format) : new Date().toISOString(),
+            timestamp : pm2_env.log_date_format && dayjs ?
+              dayjs().format(pm2_env.log_date_format) : new Date().toISOString(),
             type : 'err',
             process_id : pm2_env.pm_id,
             app_name : pm2_env.name
           }) + '\n';
         }
-        else if (pm2_env.log_date_format && dateFns)
-          log_data = `${dateFns.format(Date.now(), pm2_env.log_date_format)}: ${string.toString()}`;
+        else if (pm2_env.log_date_format && dayjs)
+          log_data = `${dayjs().format(pm2_env.log_date_format)}: ${string.toString()}`;
         else
           log_data = string.toString();
 
@@ -219,15 +219,15 @@ function exec(script, stds) {
         if (pm2_env.log_type && pm2_env.log_type === 'json') {
           log_data = JSON.stringify({
             message : string.toString(),
-            timestamp : pm2_env.log_date_format && dateFns ?
-              dateFns.format(Date.now(), pm2_env.log_date_format) : new Date().toISOString(),
+            timestamp : pm2_env.log_date_format && dayjs ?
+              dayjs().format(pm2_env.log_date_format) : new Date().toISOString(),
             type : 'out',
             process_id : pm2_env.pm_id,
             app_name : pm2_env.name
           }) + '\n';
         }
-        else if (pm2_env.log_date_format && dateFns)
-          log_data = `${dateFns.format(Date.now(), pm2_env.log_date_format)}: ${string.toString()}`;
+        else if (pm2_env.log_date_format && dayjs)
+          log_data = `${dayjs().format(pm2_env.log_date_format)}: ${string.toString()}`;
         else
           log_data = string.toString();
 
diff --git a/lib/ProcessContainerLegacy.js b/lib/ProcessContainerLegacy.js
index 92714ba3..d32e9729 100644
--- a/lib/ProcessContainerLegacy.js
+++ b/lib/ProcessContainerLegacy.js
@@ -150,10 +150,10 @@ function exec(script, stds) {
     }
   });
 
-  var dateFns = null;
+  var dayjs = null;
 
   if (pm2_env.log_date_format)
-    dateFns = require('date-fns');
+    dayjs = require('dayjs');
 
   Utility.startLogging(stds, function (err) {
     if (err) {
@@ -180,15 +180,15 @@ function exec(script, stds) {
         if (pm2_env.log_type && pm2_env.log_type === 'json') {
           log_data = JSON.stringify({
             message : string.toString(),
-            timestamp : pm2_env.log_date_format && dateFns ?
-              dateFns.format(Date.now(), pm2_env.log_date_format) : new Date().toISOString(),
+            timestamp : pm2_env.log_date_format && dayjs ?
+              dayjs().format(pm2_env.log_date_format) : new Date().toISOString(),
             type : 'err',
             process_id : pm2_env.pm_id,
             app_name : pm2_env.name
           }) + '\n';
         }
-        else if (pm2_env.log_date_format && dateFns)
-          log_data = `${dateFns.format(Date.now(), pm2_env.log_date_format)}: ${string.toString()}`;
+        else if (pm2_env.log_date_format && dayjs)
+          log_data = `${dayjs().format(pm2_env.log_date_format)}: ${string.toString()}`;
         else
           log_data = string.toString();
 
@@ -219,15 +219,15 @@ function exec(script, stds) {
         if (pm2_env.log_type && pm2_env.log_type === 'json') {
           log_data = JSON.stringify({
             message : string.toString(),
-            timestamp : pm2_env.log_date_format && dateFns ?
-              dateFns.format(Date.now(), pm2_env.log_date_format) : new Date().toISOString(),
+            timestamp : pm2_env.log_date_format && dayjs ?
+              dayjs().format(pm2_env.log_date_format) : new Date().toISOString(),
             type : 'out',
             process_id : pm2_env.pm_id,
             app_name : pm2_env.name
           }) + '\n';
         }
-        else if (pm2_env.log_date_format && dateFns)
-          log_data = `${dateFns.format(Date.now(), pm2_env.log_date_format)}: ${string.toString()}`;
+        else if (pm2_env.log_date_format && dayjs)
+          log_data = `${dayjs().format(pm2_env.log_date_format)}: ${string.toString()}`;
         else
           log_data = string.toString();
 
diff --git a/lib/Utility.js b/lib/Utility.js
index e024fff9..f007eb36 100644
--- a/lib/Utility.js
+++ b/lib/Utility.js
@@ -14,7 +14,7 @@ var cst       = require('../constants.js');
 var waterfall = require('async/waterfall');
 var util      = require('util');
 var url       = require('url');
-var dateFns = require('date-fns')
+var dayjs     = require('dayjs');
 var findPackageJson = require('./tools/find-package-json')
 
 var Utility = module.exports = {
@@ -98,7 +98,7 @@ var Utility = module.exports = {
     if (cst.PM2_LOG_DATE_FORMAT && typeof cst.PM2_LOG_DATE_FORMAT == 'string') {
       // Generate timestamp prefix
       function timestamp(){
-        return `${dateFns.format(Date.now(), cst.PM2_LOG_DATE_FORMAT)}:`;
+        return `${dayjs(Date.now()).format('YYYY-MM-DDTHH:mm:ss')}:`;
       }
 
       var hacks = ['info', 'log', 'error', 'warn'], consoled = {};
diff --git a/package.json b/package.json
index 8710579e..4bc37c0c 100644
--- a/package.json
+++ b/package.json
@@ -177,7 +177,6 @@
     "cli-table-redemption": "1.0.1",
     "commander": "2.15.1",
     "cron": "1.8.2",
-    "date-fns": "1.30.1",
     "dayjs": "1.8.24",
     "debug": "4.1.1",
     "enquirer": "^2.3.2",