diff --git a/CHANGELOG.md b/CHANGELOG.md
index 202ca9d040..2f6233c976 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,14 +16,18 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 -  Fix [#XXX](https://github.com/microsoft/BotFramework-WebChat/issues/XXX). Patched something, by [@johndoe](https://github.com/johndoe) in PR [#XXX](https://github.com/microsoft/BotFramework-WebChat/pull/XXX)
 -->
 
-## [4.5.1] - 2019-07-16
-
 <!-- ### Added
 -  Added something, by [@johndoe](https://github.com/johndoe), in PR [#XXX](https://github.com/microsoft/BotFramework-WebChat/pull/XXX)
 -->
+
+## [4.5.1] - 2019-07-16
+
+### Fixed
+
 -  Fix [#2187](https://github.com/microsoft/BotFramework-WebChat/issues/2187). Bump core-js and update core-js modules on index-es5.js, by [@corinagum](https://github.com/corinagum) in PR [#2195](https://github.com/microsoft/BotFramework-WebChat/pull/2195)
 -  Fix [#2193](https://github.com/microsoft/BotFramework-WebChat/issues/2193). Fix Adaptive Card/attachments do not get read by Narrator, by [@corinagum](https://github.com/corinagum) in PR [#2226](https://github.com/microsoft/BotFramework-WebChat/pull/2226)
 -  Fix [#2150](https://github.com/microsoft/BotFramework-WebChat/issues/2193). Fix timestamps read by Narrator, by [@corinagum](https://github.com/corinagum) in PR [#2226](https://github.com/microsoft/BotFramework-WebChat/pull/2226)
+-  Fix [#2250](https://github.com/microsoft/BotFramework-WebChat/issues/2250). Fix React warnings related prop types, by [@compulim](https://github.com/compulim) in PR [#2253](https://github.com/microsoft/BotFramework-WebChat/pull/2253)
 
 ## [4.5.0] - 2019-07-10
 
diff --git a/packages/bundle/src/adaptiveCards/Attachment/AdaptiveCardRenderer.js b/packages/bundle/src/adaptiveCards/Attachment/AdaptiveCardRenderer.js
index d126a692f0..8bc0ab47e5 100644
--- a/packages/bundle/src/adaptiveCards/Attachment/AdaptiveCardRenderer.js
+++ b/packages/bundle/src/adaptiveCards/Attachment/AdaptiveCardRenderer.js
@@ -193,7 +193,10 @@ AdaptiveCardRenderer.propTypes = {
   styleSet: PropTypes.shape({
     adaptiveCardRenderer: PropTypes.any.isRequired
   }).isRequired,
-  tapAction: PropTypes.func
+  tapAction: PropTypes.shape({
+    type: PropTypes.string.isRequired,
+    value: PropTypes.string
+  })
 };
 
 AdaptiveCardRenderer.defaultProps = {
diff --git a/packages/component/src/Attachment/TypingActivity.js b/packages/component/src/Attachment/TypingActivity.js
index cbfe1a3707..63cdb02b6f 100644
--- a/packages/component/src/Attachment/TypingActivity.js
+++ b/packages/component/src/Attachment/TypingActivity.js
@@ -7,7 +7,7 @@ import TypingAnimation from './Assets/TypingAnimation';
 
 const TypingActivity = ({ language, styleSet }) => (
   <div className={styleSet.typingActivity}>
-    <TypingAnimation ariaLabel={localize('TypingIndicator', language)} />
+    <TypingAnimation aria-label={localize('TypingIndicator', language)} />
   </div>
 );
 
@@ -18,4 +18,4 @@ TypingActivity.propTypes = {
   }).isRequired
 };
 
-export default connectToWebChat(({ styleSet }) => ({ styleSet }))(TypingActivity);
+export default connectToWebChat(({ language, styleSet }) => ({ language, styleSet }))(TypingActivity);
diff --git a/packages/component/src/ErrorBox.js b/packages/component/src/ErrorBox.js
index b6a3bd8f90..9ec3178bdc 100644
--- a/packages/component/src/ErrorBox.js
+++ b/packages/component/src/ErrorBox.js
@@ -25,4 +25,4 @@ ErrorBox.propTypes = {
   }).isRequired
 };
 
-export default connectToWebChat(({ styleSet }) => ({ styleSet }))(ErrorBox);
+export default connectToWebChat(({ language, styleSet }) => ({ language, styleSet }))(ErrorBox);