diff --git a/src/CommentCount.jsx b/src/CommentCount.jsx
index 127bc1a..3ddc4ce 100644
--- a/src/CommentCount.jsx
+++ b/src/CommentCount.jsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { insertScript, removeScript, debounce, shallowComparison } from './utils';
 
 const queueResetCount = debounce(() => {
@@ -51,3 +52,12 @@ export class CommentCount extends React.Component {
         );
     }
 }
+
+CommentCount.propTypes = {
+    shortname: PropTypes.string.isRequired,
+    config: PropTypes.shape({
+        identifier: PropTypes.string,
+        url: PropTypes.string,
+        title: PropTypes.string,
+    }).isRequired,
+};
diff --git a/src/CommentEmbed.jsx b/src/CommentEmbed.jsx
index badd90a..492bb04 100644
--- a/src/CommentEmbed.jsx
+++ b/src/CommentEmbed.jsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 
 const RADIX_BASE = 36;
 
@@ -31,3 +32,11 @@ CommentEmbed.defaultProps = {
     width: 420,
     height: 320,
 };
+
+CommentEmbed.propTypes = {
+    commentId: PropTypes.string.isRequired,
+    showMedia: PropTypes.bool,
+    showParentComment: PropTypes.bool,
+    width: PropTypes.number,
+    height: PropTypes.number,
+};
diff --git a/src/DiscussionEmbed.jsx b/src/DiscussionEmbed.jsx
index 0e26899..dd58f86 100644
--- a/src/DiscussionEmbed.jsx
+++ b/src/DiscussionEmbed.jsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { insertScript, removeScript, shallowComparison } from './utils';
 
 export class DiscussionEmbed extends React.Component {
@@ -71,3 +72,13 @@ export class DiscussionEmbed extends React.Component {
         );
     }
 }
+
+DiscussionEmbed.propTypes = {
+    shortname: PropTypes.string.isRequired,
+    config: PropTypes.shape({
+        identifier: PropTypes.string,
+        url: PropTypes.string,
+        title: PropTypes.string,
+        onNewComment: PropTypes.func,
+    }).isRequired,
+};