diff --git a/lib/recommended-rules.js b/lib/recommended-rules.js
index d332ae561..248ced9f4 100644
--- a/lib/recommended-rules.js
+++ b/lib/recommended-rules.js
@@ -1,7 +1,7 @@
 /*
  * IMPORTANT!
  * This file has been automatically generated,
- * in order to update it's content execute "npm run update"
+ * in order to update its content execute "npm run update"
  */
 module.exports = {
   "vue/attribute-hyphenation": "off",
diff --git a/lib/rules/require-prop-types.js b/lib/rules/require-prop-types.js
index 514bec509..16382aa6d 100644
--- a/lib/rules/require-prop-types.js
+++ b/lib/rules/require-prop-types.js
@@ -39,7 +39,7 @@ function create (context) {
       if (!hasType) {
         context.report({
           node: cp,
-          message: 'Prop "{{name}}" should define at least it\'s type.',
+          message: 'Prop "{{name}}" should define at least its type.',
           data: {
             name: cp.key.name
           }
diff --git a/lib/utils/index.js b/lib/utils/index.js
index 957a9d6c8..635707b67 100644
--- a/lib/utils/index.js
+++ b/lib/utils/index.js
@@ -247,7 +247,7 @@ module.exports = {
   },
 
   /**
-   * Parse member expression node to get array with all of it's parts
+   * Parse member expression node to get array with all of its parts
    * @param {ASTNode} MemberExpression
    * @returns {Array}
    */
diff --git a/tests/lib/rules/require-prop-types.js b/tests/lib/rules/require-prop-types.js
index f630354c7..1c6944e0d 100644
--- a/tests/lib/rules/require-prop-types.js
+++ b/tests/lib/rules/require-prop-types.js
@@ -111,7 +111,7 @@ ruleTester.run('require-prop-types', rule, {
       `,
       parserOptions: { ecmaVersion: 6, sourceType: 'module' },
       errors: [{
-        message: 'Prop "foo" should define at least it\'s type.',
+        message: 'Prop "foo" should define at least its type.',
         line: 4
       }]
     },
@@ -128,7 +128,7 @@ ruleTester.run('require-prop-types', rule, {
       `,
       parserOptions: { ecmaVersion: 6, sourceType: 'module' },
       errors: [{
-        message: 'Prop "foo" should define at least it\'s type.',
+        message: 'Prop "foo" should define at least its type.',
         line: 4
       }]
     },
@@ -143,7 +143,7 @@ ruleTester.run('require-prop-types', rule, {
       `,
       parserOptions: { ecmaVersion: 6, sourceType: 'module' },
       errors: [{
-        message: 'Prop "foo" should define at least it\'s type.',
+        message: 'Prop "foo" should define at least its type.',
         line: 4
       }]
     }
diff --git a/tools/update-rules.js b/tools/update-rules.js
index c1f50884e..4980d6c0c 100644
--- a/tools/update-rules.js
+++ b/tools/update-rules.js
@@ -94,7 +94,7 @@ const recommendedRules = rules.reduce((obj, entry) => {
 const recommendedRulesContent = `/*
  * IMPORTANT!
  * This file has been automatically generated,
- * in order to update it's content execute "npm run update"
+ * in order to update its content execute "npm run update"
  */
 module.exports = ${JSON.stringify(recommendedRules, null, 2)}`