diff --git a/packages/bbui/src/Icon/Icon.svelte b/packages/bbui/src/Icon/Icon.svelte
index 73ad8edd10..ccae21e5bc 100644
--- a/packages/bbui/src/Icon/Icon.svelte
+++ b/packages/bbui/src/Icon/Icon.svelte
@@ -1,4 +1,4 @@
-<script>
+<script lang="ts">
   import {
     default as AbsTooltip,
     TooltipPosition,
@@ -10,12 +10,12 @@
   export let size = "M"
   export let hoverable = false
   export let disabled = false
-  export let color
-  export let hoverColor
-  export let tooltip
+  export let color: string
+  export let hoverColor = undefined
+  export let tooltip = undefined
   export let tooltipPosition = TooltipPosition.Bottom
   export let tooltipType = TooltipType.Default
-  export let tooltipColor
+  export let tooltipColor = undefined
   export let tooltipWrap = true
   export let newStyles = false
 </script>