diff --git a/src/dat/gui/style.css b/src/dat/gui/style.css
index e53790d..df6a7d7 100644
--- a/src/dat/gui/style.css
+++ b/src/dat/gui/style.css
@@ -271,7 +271,8 @@
       color: #fff; }
   .dg .c .slider {
     background: #303030;
-    cursor: ew-resize; }
+    cursor: ew-resize;
+    overflow: hidden; }
   .dg .c .slider-fg {
     background: #2fa1d6; }
   .dg .c .slider:hover {
diff --git a/src/dat/gui/style.scss b/src/dat/gui/style.scss
index 358c65f..e12a952 100644
--- a/src/dat/gui/style.scss
+++ b/src/dat/gui/style.scss
@@ -184,6 +184,7 @@ $input-color: lighten($background-color, 8.5%);
     .slider {
       background: $input-color;
       cursor: ew-resize;
+      overflow: hidden;
     }
 
     .slider-fg {