diff --git a/theme/style.less b/theme/style.less
index 03a60d9c..646b1d30 100644
--- a/theme/style.less
+++ b/theme/style.less
@@ -57,6 +57,7 @@
 .blocklyToolboxDiv, .monacoToolboxDiv {
     background-color: white !important;
     border-left: 1px solid #ecf0f1 !important;
+    box-shadow: 0px 0px 2px 0px rgba(0,0,0,0.12), 0px 2px 2px 0px rgba(0,0,0,0.24);
 }
 
 .blocklyFlyoutBackground {
@@ -76,12 +77,12 @@
 /* Blockly Toolbox Buttons */
 .blocklyToolboxButtons .blocklyAddPackageButton {
     &:extend(.ui.inverted.pink.button all);
-    &:extend(.circular all);
+    &:extend(.ui.circular.button all);
 }
 
 .blocklyToolboxButtons .blocklyUndoButton {
     &:extend(.ui.inverted.blue.button all);
-    &:extend(.circular all);
+    &:extend(.ui.circular.button all);
 }
 
 /*******************************