diff --git a/scss/components/_accordion.scss b/scss/components/_accordion.scss
index 73f0ad86..60ceeac7 100644
--- a/scss/components/_accordion.scss
+++ b/scss/components/_accordion.scss
@@ -110,9 +110,17 @@
 
         &::after {
           float: left;
+          transform: rotate(90deg);
           background-position: left center;
         }
       }
+      &[open] {
+        > summary {
+          &::after {
+            transform: rotate(0);
+          }
+        }
+      }
     }
   }
 }