diff --git a/app/css/app.css b/app/css/app.css
index 866928f..70c6a35 100644
--- a/app/css/app.css
+++ b/app/css/app.css
@@ -506,7 +506,7 @@ button:focus {
 #sequence #cam_forward input[type=checkbox],
 #sequence #proj_forward input[type=checkbox],
 #sequence #black_forward input[type=checkbox] {
-  border: 1px solid #00C4A0;
+  border: 2px solid #00C4A0;
 }
 #sequence #cam_forward input[type=checkbox]:checked,
 #sequence #proj_forward input[type=checkbox]:checked,
@@ -526,7 +526,7 @@ button:focus {
 #sequence #cam_backward input[type=checkbox],
 #sequence #proj_backward input[type=checkbox],
 #sequence #black_backward input[type=checkbox] {
-  border: 1px solid #AB1A25;
+  border: 2px solid #AB1A25;
 }
 #sequence #cam_backward input[type=checkbox]:checked,
 #sequence #proj_backward input[type=checkbox]:checked,
@@ -562,7 +562,7 @@ button:focus {
   margin: 0;
   margin-bottom: 3px;
   margin-right: 3px;
-  border: 1px solid #fff;
+  border: 2px solid #fff;
   opacity: 0.5;
   cursor: pointer;
 }
diff --git a/app/css/app.less b/app/css/app.less
index f4796c6..25f9e37 100644
--- a/app/css/app.less
+++ b/app/css/app.less
@@ -529,7 +529,7 @@ button{
 	#black_forward{
 		clear: both;
 		input[type=checkbox]{
-			border: 1px solid @FORWARD;
+			border: 2px solid @FORWARD;
 			&:checked{
 				background: @FORWARD;
 				//background: radial-gradient(circle at 25px 25px, #00C4A0, #343434);
@@ -544,7 +544,7 @@ button{
 	#black_backward{
 		clear: both;
 		input[type=checkbox]{
-			border: 1px solid @BACKWARD;
+			border: 2px solid @BACKWARD;
 			&:checked{
 				background: @BACKWARD;
 				//background: radial-gradient(circle at 25px 25px, #AB1A25, #343434);
@@ -578,7 +578,7 @@ button{
 		margin: 0;
 		margin-bottom: 3px;
 		margin-right: 3px;
-		border: 1px solid @COMMON;
+		border: 2px solid @COMMON;
 		opacity: 0.5;
 		cursor: pointer;
 		&.a{