diff --git a/htdocs/theme/yellow/yellow.css b/htdocs/theme/yellow/yellow.css
index ba069ec4bdc..ef1d57f8aaa 100644
--- a/htdocs/theme/yellow/yellow.css
+++ b/htdocs/theme/yellow/yellow.css
@@ -219,6 +219,7 @@ p#powered-by-dolibarr {
 	margin: 0;
 	padding: 0;
 	bottom: 2px;
+	font-size: 0.8em;
 	left: 0px;
 	z-index: 2;
 }
@@ -227,7 +228,7 @@ p#powered-by-dolibarr a {
 	border: 1px solid black;
 	text-decoration: none;
 	color: black;
-	font-size: 0.9em;
+	font-size: 0.8em;
 	padding-right: 5px;
 	padding-left: 5px;
 }
\ No newline at end of file