diff --git a/lib/git.js b/lib/git.js
index 6833785e..77931be9 100644
--- a/lib/git.js
+++ b/lib/git.js
@@ -4,7 +4,7 @@ const debug = require('debug')('semantic-release:git');
 /**
  * Get the commit sha for a given tag.
  *
- * @param {string} tagName Tag name for which to retrieve the commit sha.
+ * @param {String} tagName Tag name for which to retrieve the commit sha.
  * @param {Object} [execaOpts] Options to pass to `execa`.
  *
  * @return {string} The commit sha of the tag in parameter or `null`.
@@ -35,10 +35,10 @@ async function getTags(execaOpts) {
 /**
  * Verify if the `ref` is in the direct history of the current branch.
  *
- * @param {string} ref The reference to look for.
+ * @param {String} ref The reference to look for.
  * @param {Object} [execaOpts] Options to pass to `execa`.
  *
- * @return {boolean} `true` if the reference is in the history of the current branch, falsy otherwise.
+ * @return {Boolean} `true` if the reference is in the history of the current branch, falsy otherwise.
  */
 async function isRefInHistory(ref, execaOpts) {
   try {
@@ -73,7 +73,7 @@ async function fetch(repositoryUrl, execaOpts) {
  *
  * @param {Object} [execaOpts] Options to pass to `execa`.
  *
- * @return {string} the sha of the HEAD commit.
+ * @return {String} the sha of the HEAD commit.
  */
 function getGitHead(execaOpts) {
   return execa.stdout('git', ['rev-parse', 'HEAD'], execaOpts);
@@ -155,10 +155,10 @@ async function push(repositoryUrl, branch, execaOpts) {
 /**
  * Verify a tag name is a valid Git reference.
  *
- * @param {string} tagName the tag name to verify.
+ * @param {String} tagName the tag name to verify.
  * @param {Object} [execaOpts] Options to pass to `execa`.
  *
- * @return {boolean} `true` if valid, falsy otherwise.
+ * @return {Boolean} `true` if valid, falsy otherwise.
  */
 async function verifyTagName(tagName, execaOpts) {
   try {