diff --git a/app/css/main.css b/app/css/main.css
index 9070376..ce84963 100644
--- a/app/css/main.css
+++ b/app/css/main.css
@@ -6,3 +6,7 @@
   padding: 0;
   color: #B2B2B2;
 }
+
+#warning-alert {
+  display: none;
+}
diff --git a/app/index.html b/app/index.html
index de84ea4..2508573 100644
--- a/app/index.html
+++ b/app/index.html
@@ -93,6 +93,10 @@ <h4 class="modal-title">Beagle Term: New Connection</h4>
                 <div class="modal-footer">
                     <button type="button" id="connectBtn" class="btn btn-primary" data-dismiss="modal">Connect</button>
                 </div>
+                <div id="warning-alert" class="alert alert-danger">
+                    <strong>Warning!</strong> BeagleTerm cannot connect to device on this version.
+                    See <a href="#"><span id="warning-detail">Details</span></a>
+                </div>
             </div><!-- /.modal-content -->
         </div><!-- /.modal-dialog -->
     </div><!-- /.modal -->
diff --git a/app/js/index.js b/app/js/index.js
index de3d729..940ad46 100644
--- a/app/js/index.js
+++ b/app/js/index.js
@@ -7,8 +7,18 @@ var self;
 
 document.addEventListener('DOMContentLoaded', function() {
   $('#settingsModal').modal('show');
+  showWarningIfChromeOs();
 }, false);
 
+var showWarningIfChromeOs = function() {
+  var userAgent = navigator.userAgent;
+  // TODO: Use Rex.
+  if (userAgent.includes('CrOS') &&
+      userAgent.includes('54.0')) {
+    $('#warning-alert').show();
+  }
+};
+
 /*
  *  Utility functions
  *
@@ -221,3 +231,9 @@ connectBtn.addEventListener('click', function(event) {
     });
   });
 });
+
+// Closes the settings dialog
+var WarningSpan = document.querySelector('#warning-detail');
+WarningSpan.addEventListener('click', function(event) {
+  window.open('https://github.com/beagleterm/beagle-term/issues/78');
+});