diff --git a/guacamole/src/main/webapp/app/manage/styles/sessions.css b/guacamole/src/main/webapp/app/manage/styles/sessions.css
index 7949aad01..30b486828 100644
--- a/guacamole/src/main/webapp/app/manage/styles/sessions.css
+++ b/guacamole/src/main/webapp/app/manage/styles/sessions.css
@@ -31,6 +31,7 @@
 
 .manage table.session-list th {
     background: rgba(0, 0, 0, 0.125);
+    font-weight: normal;
 }
 
 .manage table.session-list th,
@@ -53,13 +54,25 @@
 }
 
 .manage table.session-list th.sort-primary {
-    text-decoration: underline;
+    font-weight: bold;
+    padding-right: 0;
 }
 
 .manage table.session-list th.sort-primary:after {
-    content: ' \25be';
+
+    display: inline-block;
+    width: 1em;
+    height: 1em;
+    vertical-align: middle;
+    content: ' ';
+
+    background-size: 1em 1em;
+    background-position: right center;
+    background-repeat: no-repeat;
+    background-image: url('images/arrows/down.png');
+
 }
 
 .manage table.session-list th.sort-primary.sort-descending:after {
-    content: ' \25b2';
+    background-image: url('images/arrows/up.png');
 }
diff --git a/guacamole/src/main/webapp/images/arrows/arrows-d.png b/guacamole/src/main/webapp/images/arrows/arrows-d.png
deleted file mode 100644
index 15b1a77b3..000000000
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diff --git a/guacamole/src/main/webapp/images/arrows/arrows-l.png b/guacamole/src/main/webapp/images/arrows/arrows-l.png
deleted file mode 100644
index 91f8150d3..000000000
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diff --git a/guacamole/src/main/webapp/images/arrows/arrows-r.png b/guacamole/src/main/webapp/images/arrows/arrows-r.png
deleted file mode 100644
index 3ab9d5b2b..000000000
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diff --git a/guacamole/src/main/webapp/images/arrows/arrows-u.png b/guacamole/src/main/webapp/images/arrows/arrows-u.png
deleted file mode 100644
index 057cccf95..000000000
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diff --git a/guacamole/src/main/webapp/images/arrows/down.png b/guacamole/src/main/webapp/images/arrows/down.png
new file mode 100644
index 000000000..cfa9885d8
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diff --git a/guacamole/src/main/webapp/images/arrows/up.png b/guacamole/src/main/webapp/images/arrows/up.png
new file mode 100644
index 000000000..e751af83d
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