diff --git a/core/css.ts b/core/css.ts
index 37de8e761..9a3323129 100644
--- a/core/css.ts
+++ b/core/css.ts
@@ -461,7 +461,7 @@ input[type=number] {
 }
 
 .blocklyMenuItemSelected .blocklyMenuItemCheckbox {
-  background: url(<<<PATH>>>/sprites.png) no-repeat -48px -16px;
+  background: url(<<<PATH>>>/sprites.svg) no-repeat -48px -16px;
   float: left;
   margin-left: -24px;
   position: static;  /* Scroll with the menu. */
diff --git a/core/sprites.ts b/core/sprites.ts
index 41933de3d..300e1ce06 100644
--- a/core/sprites.ts
+++ b/core/sprites.ts
@@ -11,5 +11,5 @@
 export const SPRITE = {
   width: 96,
   height: 124,
-  url: 'sprites.png',
+  url: 'sprites.svg',
 };
diff --git a/core/toolbox/category.ts b/core/toolbox/category.ts
index 7b0db7b3f..dd42a549f 100644
--- a/core/toolbox/category.ts
+++ b/core/toolbox/category.ts
@@ -692,7 +692,7 @@ Css.register(`
 }
 
 .blocklyToolboxCategoryIcon {
-  background-image: url(<<<PATH>>>/sprites.png);
+  background-image: url(<<<PATH>>>/sprites.svg);
   height: 16px;
   vertical-align: middle;
   visibility: hidden;
diff --git a/media/sprites.png b/media/sprites.png
deleted file mode 100644
index 20aadb6c4..000000000
Binary files a/media/sprites.png and /dev/null differ