diff --git a/data/interfaces/default/settings.html b/data/interfaces/default/settings.html
index 6089935b..1ee1cfc4 100644
--- a/data/interfaces/default/settings.html
+++ b/data/interfaces/default/settings.html
@@ -577,7 +577,7 @@
                                         </div>
                                     </div>
                                 </div>
-                                <p class="help-block">The location of the SSL certificate.</p>
+                                <p class="help-block">The location of the SSL certificate in PEM format.</p>
                             </div>
                             <div class="form-group advanced-setting">
                                 <label for="https_cert_chain">HTTPS Certificate Chain</label>
@@ -591,7 +591,7 @@
                                         </div>
                                     </div>
                                 </div>
-                                <p class="help-block">The location of the SSL certificate chain.</p>
+                                <p class="help-block">The location of the SSL certificate chain in PEM format.</p>
                             </div>
                             <div class="form-group advanced-setting">
                                 <label for="https_key">HTTPS Key</label>
@@ -605,7 +605,7 @@
                                         </div>
                                     </div>
                                 </div>
-                                <p class="help-block">The location of the SSL key.</p>
+                                <p class="help-block">The location of the SSL key in PEM format.</p>
                             </div>
                         </div>