diff --git a/src/renderer/dom/DomRendererRowFactory.ts b/src/renderer/dom/DomRendererRowFactory.ts
index 707d3466..4d2143ee 100644
--- a/src/renderer/dom/DomRendererRowFactory.ts
+++ b/src/renderer/dom/DomRendererRowFactory.ts
@@ -109,7 +109,7 @@ export class DomRendererRowFactory {
       }
 
       if (flags & FLAGS.DIM) {
-        charElement.classList.add(exports.DIM_CLASS);
+        charElement.classList.add(DIM_CLASS);
       }
 
       charElement.textContent = this._workCell.getChars() || WHITESPACE_CELL_CHAR;
diff --git a/src/xterm.css b/src/xterm.css
index e0319f87..e80c2524 100644
--- a/src/xterm.css
+++ b/src/xterm.css
@@ -163,5 +163,5 @@
 }
 
 .xterm-dim {
-    opacity: 0.6;
+    opacity: 0.5;
 }