diff --git a/themes/codesandbox-dark.json b/themes/codesandbox-dark.json
index e89a3c9..bf09af9 100644
--- a/themes/codesandbox-dark.json
+++ b/themes/codesandbox-dark.json
@@ -28,7 +28,7 @@
     "activityBarBadge.foreground": "#000",
     "activityBarBadge.background": "#edffa5",
     "activityBar.border": "#000",
-    "actibityBar.activeBackground": "#151515",
+    "activityBar.activeBackground": "#151515",
 
     "sideBar.background": "#000",
     "sideBar.foreground": "#999",