diff --git a/src/Action/Responses/BasicCard.php b/src/Action/Responses/BasicCard.php
index f281e59..af3e51e 100644
--- a/src/Action/Responses/BasicCard.php
+++ b/src/Action/Responses/BasicCard.php
@@ -87,7 +87,7 @@ public function button($buttonText, $buttonUrl)
     {
         $this->buttons[] = [
             'buttonText' => $buttonText,
-            'buttonUrl' =>  $buttonUrl
+            'buttonUrl' =>  $buttonUrl,
         ];
 
         return $this;
@@ -119,7 +119,7 @@ public function renderRichResponseItem()
         }
 
         if ($this->buttons) {
-            foreach ($this->buttons as $button){
+            foreach ($this->buttons as $button) {
                 $basicCard['buttons'][] =
                     [
                         'title'         => $button['buttonText'],
diff --git a/src/RichMessage/Card.php b/src/RichMessage/Card.php
index f1fcc5c..17e70f3 100644
--- a/src/RichMessage/Card.php
+++ b/src/RichMessage/Card.php
@@ -78,7 +78,7 @@ public function button($buttonText, $buttonUrl)
     {
         $this->buttons[] = [
             'buttonText' => $buttonText,
-            'buttonUrl' =>  $buttonUrl
+            'buttonUrl' =>  $buttonUrl,
         ];
 
         return $this;
@@ -115,7 +115,7 @@ protected function renderV1()
 
             if ($this->buttons) {
                 $out['buttons'] = [];
-                foreach ($this->buttons as $button){
+                foreach ($this->buttons as $button) {
                     $out['buttons'][] =
                         [
                             'title'         => $button['buttonText'],
@@ -147,7 +147,7 @@ protected function renderV1()
 
             if ($this->buttons) {
                 $out['buttons'] = [];
-                foreach ($this->buttons as $button){
+                foreach ($this->buttons as $button) {
                     $out['buttons'][] =
                         [
                             'text'     => $button['buttonText'],
@@ -190,7 +190,7 @@ protected function renderV2()
 
             if ($this->buttons) {
                 $out['basicCard']['buttons'] = [];
-                foreach ($this->buttons as $button){
+                foreach ($this->buttons as $button) {
                     $out['basicCard']['buttons'][] =
                         [
                             'title'         => $button['buttonText'],
@@ -220,7 +220,7 @@ protected function renderV2()
 
             if ($this->buttons) {
                 $out['card']['buttons'] = [];
-                foreach ($this->buttons as $button){
+                foreach ($this->buttons as $button) {
                     $out['card']['buttons'][] =
                         [
                             'text'         => $button['buttonText'],