diff --git a/src/components/progress-bar/progress-bar.styles.ts b/src/components/progress-bar/progress-bar.styles.ts
index f0957d1fbd..7c4501c148 100644
--- a/src/components/progress-bar/progress-bar.styles.ts
+++ b/src/components/progress-bar/progress-bar.styles.ts
@@ -45,12 +45,12 @@ export default css`
 
   @keyframes indeterminate {
     0% {
-      left: -50%;
+      inset-inline-start: -50%;
       width: 50%;
     }
     75%,
     100% {
-      left: 100%;
+      inset-inline-start: 100%;
       width: 50%;
     }
   }