diff --git a/phpBB/adm/style/admin.css b/phpBB/adm/style/admin.css
index 512c714fcc..7472788a0a 100644
--- a/phpBB/adm/style/admin.css
+++ b/phpBB/adm/style/admin.css
@@ -2363,11 +2363,14 @@ fieldset.permissions .padding {
 .dropdown .dropdown-contents {
 	z-index: 2;
 	overflow: hidden;
+	overflow-y: auto;
 	background: #fff;
 	border: 1px solid #b9b9b9;
 	border-radius: 5px;
 	padding: 5px;
 	position: relative;
+	min-width: 40px;
+	max-height: 200px;
 	box-shadow: 1px 3px 5px rgba(0, 0, 0, 0.2);
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
diff --git a/phpBB/styles/prosilver/template/forum_fn.js b/phpBB/styles/prosilver/template/forum_fn.js
index d4653c1be3..a45f750a63 100644
--- a/phpBB/styles/prosilver/template/forum_fn.js
+++ b/phpBB/styles/prosilver/template/forum_fn.js
@@ -460,8 +460,8 @@ function parse_document(container)
 
 		if ($this.hasClass('dropdown-up')) options.verticalDirection = 'up';
 		if ($this.hasClass('dropdown-down')) options.verticalDirection = 'down';
-		if ($this.hasClass('dropdown-left')) options.verticalDirection = 'left';
-		if ($this.hasClass('dropdown-right')) options.verticalDirection = 'right';
+		if ($this.hasClass('dropdown-left')) options.direction = 'left';
+		if ($this.hasClass('dropdown-right')) options.direction = 'right';
 
 		phpbb.registerDropdown(trigger, contents, options);
 	});
diff --git a/phpBB/styles/prosilver/theme/common.css b/phpBB/styles/prosilver/theme/common.css
index 41cfb37cf2..a133d62239 100644
--- a/phpBB/styles/prosilver/theme/common.css
+++ b/phpBB/styles/prosilver/theme/common.css
@@ -522,10 +522,13 @@ ul.linklist.bulletin li.no-bulletin:before {
 .dropdown .dropdown-contents {
 	z-index: 2;
 	overflow: hidden;
+	overflow-y: auto;
 	border: 1px solid transparent;
 	border-radius: 5px;
 	padding: 5px;
 	position: relative;
+	min-width: 40px;
+	max-height: 200px;
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;