diff --git a/embark-ui/src/components/Accounts.js b/embark-ui/src/components/Accounts.js
index 06176c81..5917cfc2 100644
--- a/embark-ui/src/components/Accounts.js
+++ b/embark-ui/src/components/Accounts.js
@@ -40,7 +40,7 @@ const Accounts = ({accounts}) => (
 );
 
 Accounts.propTypes = {
-  accounts: PropTypes.object
+  accounts: PropTypes.arrayOf(PropTypes.object)
 };
 
 export default Accounts;
diff --git a/embark-ui/src/components/Blocks.js b/embark-ui/src/components/Blocks.js
index ba78b70c..ef986d6a 100644
--- a/embark-ui/src/components/Blocks.js
+++ b/embark-ui/src/components/Blocks.js
@@ -35,7 +35,7 @@ const Blocks = ({blocks}) => (
 );
 
 Blocks.propTypes = {
-  blocks: [PropTypes.object]
+  blocks: PropTypes.arrayOf(PropTypes.object)
 };
 
 export default Blocks;