diff --git a/bin/util/index.js b/bin/util/index.js
index 6498df7..e0fa496 100644
--- a/bin/util/index.js
+++ b/bin/util/index.js
@@ -1,8 +1,7 @@
 const { Readable } = require('stream');
 
 const isCommandline = (userAgent) => {
-  const check = (userAgent.search(/curl|wget/i) !== -1);
-  return check;
+  return (userAgent.search(/curl|wget/i) !== -1);
 };
 
 const getStream = (req, res) => {
diff --git a/lib/cli/index.js b/lib/cli/index.js
index 08e20de..e0ecd5a 100644
--- a/lib/cli/index.js
+++ b/lib/cli/index.js
@@ -8,22 +8,22 @@ const color     = require('ansi-styles'),
 
 const 
       // table color
-      tblclr = (border) => {return cyan(border);},
+      tblclr = (border) => cyan(border),
       // normal ansi colors
-      white = (txt) => {return color.white.open+txt+color.white.close;},
-      black = (txt) => {return color.black.open+txt+color.black.close;},
-      green = (txt) => {return color.green.open+txt+color.green.close;},
-      cyan = (txt) => {return color.cyan.open+txt+color.cyan.close;},
-      magenta = (txt) => {return color.magenta.open+txt+color.magenta.close;},
-      yellow = (txt) => {return color.yellow.open+txt+color.yellow.close;},
-      red = (txt) => {return color.red.open+txt+color.red.close;},
+      white = (txt) => color.white.open + txt + color.white.close,
+      black = (txt) => color.black.open + txt + color.black.close,
+      green = (txt) => color.green.open + txt + color.green.close,
+      cyan  = (txt) => color.cyan.open + txt + color.cyan.close,
+      magenta = (txt) => color.magenta.open + txt + color.magenta.close,
+      yellow = (txt) => color.yellow.open + txt + color.yellow.close,
+      red = (txt) => color.red.open + txt + color.red.close,
       // bright ansi colors
-      cyanBright = (txt) => {return color.cyanBright.open+txt+color.cyanBright.close;},
-      magentaBright = (txt) => {return color.magentaBright.open+txt+color.magentaBright.close;},
-      redBright = (txt) => {return color.redBright.open+txt+color.redBright.close;},
-      greenBright = (txt) => {return color.greenBright.open+txt+color.greenBright.close;},
+      cyanBright = (txt) => color.cyanBright.open + txt + color.cyanBright.close,
+      magentaBright = (txt) => color.magentaBright.open + txt + color.magentaBright.close,
+      redBright = (txt) => color.redBright.open + txt + color.redBright.close,
+      greenBright = (txt) => color.greenBright.open + txt + color.greenBright.close,
       // background ansi color
-      cyanBG = (txt) => {return color.bgCyan.open+txt+color.bgCyan.close;},
+      cyanBG = (txt) => color.bgCyan.open + txt + color.bgCyan.close,
       // horizontal line
       line = '-'.repeat(60);