diff --git a/src/ListBox/ListBoxSelection.svelte b/src/ListBox/ListBoxSelection.svelte
index 317a300d..dec717da 100644
--- a/src/ListBox/ListBoxSelection.svelte
+++ b/src/ListBox/ListBoxSelection.svelte
@@ -62,7 +62,7 @@
     <div
       bind:this="{ref}"
       role="button"
-      tabIndex="{disabled ? -1 : 0}"
+      tabindex="{disabled ? -1 : 0}"
       class:bx--tag__close-icon="{true}"
       on:click|preventDefault|stopPropagation="{(e) => {
         if (!disabled) {
diff --git a/src/Tooltip/Tooltip.svelte b/src/Tooltip/Tooltip.svelte
index a520cd59..b9df6d48 100644
--- a/src/Tooltip/Tooltip.svelte
+++ b/src/Tooltip/Tooltip.svelte
@@ -254,7 +254,7 @@
         on:click|stopPropagation
         on:mousedown|stopPropagation
         class:bx--tooltip__content="{true}"
-        tabIndex="-1"
+        tabindex="-1"
         role="dialog"
       >
         <slot />