diff --git a/plinth/modules/firewall/static/firewall.css b/plinth/modules/firewall/static/firewall.css
index c67e29634..36cbc5564 100644
--- a/plinth/modules/firewall/static/firewall.css
+++ b/plinth/modules/firewall/static/firewall.css
@@ -3,6 +3,7 @@
 */
 
 a.dropdown-toggle {
+    text-decoration: none;
     color: black;
 }
 
diff --git a/plinth/modules/networks/static/networks.css b/plinth/modules/networks/static/networks.css
index 8d8c690b7..b497ce369 100644
--- a/plinth/modules/networks/static/networks.css
+++ b/plinth/modules/networks/static/networks.css
@@ -32,6 +32,10 @@
     margin-bottom: 2rem;
 }
 
+.connection-diagram a {
+    text-decoration: none;  /* Not important so make them less noisy */
+}
+
 .col-image {
     display: block;
     width: 100%;