diff --git a/src/wp-admin/css/about.css b/src/wp-admin/css/about.css
index 07ebffd90f..21952f2e21 100644
--- a/src/wp-admin/css/about.css
+++ b/src/wp-admin/css/about.css
@@ -130,7 +130,7 @@
 	margin: 0.2em 200px 0 0;
 	padding: 0;
 	color: #32373c;
-	line-height: 1.2em;
+	line-height: 1.2;
 	font-size: 2.8em;
 	font-weight: 400;
 }
@@ -175,7 +175,7 @@
 .about-wrap .about-text {
 	margin-top: 1.4em;
 	font-weight: 400;
-	line-height: 1.6em;
+	line-height: 1.6;
 	font-size: 19px;
 }
 
@@ -452,7 +452,7 @@
 	margin: 6px 0 2px;
 	font-size: 16px;
 	font-weight: 400;
-	line-height: 2em;
+	line-height: 2;
 	text-decoration: none;
 }