diff --git a/packages/core/src/browser/style/index.css b/packages/core/src/browser/style/index.css
index 6b99cbb27913e..11eac0003e6d1 100644
--- a/packages/core/src/browser/style/index.css
+++ b/packages/core/src/browser/style/index.css
@@ -146,7 +146,7 @@ blockquote {
     outline-width: 1px;
     outline-style: solid;
     outline-offset: -1px;
-    opacity: 1 !important;
+    opacity: 1;
     outline-color: var(--theia-focusBorder);
 }