diff --git a/modules/jquery.wikiEditor.css b/modules/jquery.wikiEditor.css
index 6df44565..d8e331cc 100644
--- a/modules/jquery.wikiEditor.css
+++ b/modules/jquery.wikiEditor.css
@@ -9,6 +9,12 @@
 	width: 100%;
 	background-color: #E0EEf7;
 	border: solid silver 1px;
+	-moz-box-sizing: border-box;
+	-webkit-box-sizing: border-box;
+	box-sizing: border-box;
+}
+.wikiEditor-ui textarea {
+	width: 100%;
 }
 .wikiEditor-ui textarea:focus {
 	outline: none;
@@ -109,4 +115,4 @@
 	background: url(images/toolbar/loading.gif) 0 0 no-repeat;
 	text-indent: -9999px;
 	margin: 0 auto;
-}
\ No newline at end of file
+}