diff --git a/thrimbletrimmer/styles/thrimbletrimmer.css b/thrimbletrimmer/styles/thrimbletrimmer.css
index 557684c..1e6f265 100644
--- a/thrimbletrimmer/styles/thrimbletrimmer.css
+++ b/thrimbletrimmer/styles/thrimbletrimmer.css
@@ -288,6 +288,10 @@ a.click {
 	text-align: right;
 }
 
+input.range-definition-chapter-marker-description {
+	width: 500px;
+}
+
 .add-range-definition-chapter-marker {
 	margin-left: 30px;
 	margin-bottom: 7px;