diff --git a/caesar/caesar.js b/caesar/caesar.js
index c2e926f..b6dcd95 100644
--- a/caesar/caesar.js
+++ b/caesar/caesar.js
@@ -1,7 +1,7 @@
-const caesar = function(string, shift) {
+const caesar = function(string, shiftValue) {
   return string
     .split("")
-    .map(char => shiftChar(char, shift))
+    .map(char => shift(char, shiftValue))
     .join("");
 };
 
@@ -12,12 +12,12 @@ const codeSet = code => (code < 97 ? 65 : 97);
 // https://stackoverflow.com/questions/4467539/javascript-modulo-gives-a-negative-result-for-negative-numbers
 const mod = (n, m) => (n % m + m) % m;
 
-const shiftChar = (char, shift) => {
+const shift = (char, shiftValue) => {
   const code = char.charCodeAt();
 
   if ((code >= 65 && code <= 90) || (code >= 97 && code <= 122)) {
     return String.fromCharCode(
-      mod(code + shift - codeSet(code), 26) + codeSet(code)
+      mod(code + shiftValue - codeSet(code), 26) + codeSet(code)
     );
   }
   return char;