diff --git a/package.json b/package.json
index 436fb46b3..40f9629b1 100644
--- a/package.json
+++ b/package.json
@@ -12,13 +12,13 @@
   },
   "dependencies": {
     "ajv": "5.5.2",
-    "angular": "1.5.11",
+    "angular": "1.6.8",
     "angular-clipboard": "1.6.2",
     "angular-local-storage": "0.7.1",
     "angular-marked": "1.2.2",
-    "angular-resource": "1.5.11",
-    "angular-route": "1.5.11",
-    "angular-sanitize": "1.5.11",
+    "angular-resource": "1.6.8",
+    "angular-route": "1.6.8",
+    "angular-sanitize": "1.6.8",
     "angular-toarrayfilter": "1.0.3",
     "angular-ui-router": "0.4.3",
     "angular1-ui-bootstrap4": "2.4.22",
@@ -57,7 +57,7 @@
     "taskcluster-client": "2.5.4"
   },
   "devDependencies": {
-    "angular-mocks": "1.5.11",
+    "angular-mocks": "1.6.8",
     "enzyme": "3.3.0",
     "enzyme-adapter-react-16": "1.1.1",
     "jasmine-core": "2.8.0",
diff --git a/ui/js/failureviewer.js b/ui/js/failureviewer.js
index 9588cfc22..53b883745 100644
--- a/ui/js/failureviewer.js
+++ b/ui/js/failureviewer.js
@@ -2,9 +2,14 @@
 
 var failureViewerApp = angular.module('failureviewer', ['treeherder']);
 
-failureViewerApp.config(['$compileProvider', function ($compileProvider) {
+failureViewerApp.config(['$compileProvider', '$locationProvider',
+        function ($compileProvider, $locationProvider) {
     // Disable debug data, as recommended by https://docs.angularjs.org/guide/production
     $compileProvider.debugInfoEnabled(false);
+
+    // Revert to the legacy Angular <=1.5 URL hash prefix to save breaking existing links:
+    // https://docs.angularjs.org/guide/migration#commit-aa077e8
+    $locationProvider.hashPrefix('');
 }]).run(require('./cache-templates'));
 
 module.exports = failureViewerApp;
diff --git a/ui/js/logviewer.js b/ui/js/logviewer.js
index 5c39684e1..033b15264 100644
--- a/ui/js/logviewer.js
+++ b/ui/js/logviewer.js
@@ -2,11 +2,15 @@
 
 var logViewerApp = angular.module('logviewer', ['treeherder']);
 
-logViewerApp.config(['$compileProvider', '$resourceProvider',
-    function ($compileProvider, $resourceProvider) {
+logViewerApp.config(['$compileProvider', '$locationProvider', '$resourceProvider',
+    function ($compileProvider, $locationProvider, $resourceProvider) {
         // Disable debug data, as recommended by https://docs.angularjs.org/guide/production
         $compileProvider.debugInfoEnabled(false);
 
+        // Revert to the legacy Angular <=1.5 URL hash prefix to save breaking existing links:
+        // https://docs.angularjs.org/guide/migration#commit-aa077e8
+        $locationProvider.hashPrefix('');
+
         // Don't strip trailing slashes from calculated URLs
         $resourceProvider.defaults.stripTrailingSlashes = false;
 
diff --git a/ui/js/perfapp.js b/ui/js/perfapp.js
index 94b37e7d3..3d8f97534 100644
--- a/ui/js/perfapp.js
+++ b/ui/js/perfapp.js
@@ -1,11 +1,15 @@
 "use strict";
 
 // configure the router here, after we have defined all the controllers etc
-perf.config(['$compileProvider', '$httpProvider', '$stateProvider', '$urlRouterProvider',
-    function ($compileProvider, $httpProvider, $stateProvider, $urlRouterProvider) {
+perf.config(['$compileProvider', '$locationProvider', '$httpProvider', '$stateProvider', '$urlRouterProvider',
+    function ($compileProvider, $locationProvider, $httpProvider, $stateProvider, $urlRouterProvider) {
         // Disable debug data, as recommended by https://docs.angularjs.org/guide/production
         $compileProvider.debugInfoEnabled(false);
 
+        // Revert to the legacy Angular <=1.5 URL hash prefix to save breaking existing links:
+        // https://docs.angularjs.org/guide/migration#commit-aa077e8
+        $locationProvider.hashPrefix('');
+
         $httpProvider.defaults.xsrfHeaderName = 'X-CSRFToken';
         $httpProvider.defaults.xsrfCookieName = 'csrftoken';
         $httpProvider.useApplyAsync(true);
diff --git a/ui/js/treeherder_app.js b/ui/js/treeherder_app.js
index 477ffa45e..2c4b8fcc7 100644
--- a/ui/js/treeherder_app.js
+++ b/ui/js/treeherder_app.js
@@ -5,13 +5,17 @@ var treeherderApp = angular.module('treeherder.app',
         'mc.resizer', 'angular-toArrayFilter', 'react',
         'hc.marked']);
 
-treeherderApp.config(['$compileProvider', '$routeProvider', '$httpProvider',
+treeherderApp.config(['$compileProvider', '$locationProvider', '$routeProvider', '$httpProvider',
     '$logProvider', '$resourceProvider', 'localStorageServiceProvider',
-    function ($compileProvider, $routeProvider, $httpProvider, $logProvider,
+    function ($compileProvider, $locationProvider, $routeProvider, $httpProvider, $logProvider,
              $resourceProvider, localStorageServiceProvider) {
         // Disable debug data, as recommended by https://docs.angularjs.org/guide/production
         $compileProvider.debugInfoEnabled(false);
 
+        // Revert to the legacy Angular <=1.5 URL hash prefix to save breaking existing links:
+        // https://docs.angularjs.org/guide/migration#commit-aa077e8
+        $locationProvider.hashPrefix('');
+
         // Don't strip trailing slashes from calculated URLs
         $resourceProvider.defaults.stripTrailingSlashes = false;
 
diff --git a/yarn.lock b/yarn.lock
index 477a8a0e3..4bfb83660 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -116,21 +116,21 @@ angular-marked@1.2.2:
   dependencies:
     marked "^0.3.3"
 
-angular-mocks@1.5.11:
-  version "1.5.11"
-  resolved "https://registry.yarnpkg.com/angular-mocks/-/angular-mocks-1.5.11.tgz#a0e1dd0ea55fd77ee7a757d75536c5e964c86f81"
+angular-mocks@1.6.8:
+  version "1.6.8"
+  resolved "https://registry.yarnpkg.com/angular-mocks/-/angular-mocks-1.6.8.tgz#ba2120057b4edaa56492d8789ddfbc8f18afa3c5"
 
-angular-resource@1.5.11:
-  version "1.5.11"
-  resolved "https://registry.yarnpkg.com/angular-resource/-/angular-resource-1.5.11.tgz#d93ea619184a2e0ee3ae338265758363172929f0"
+angular-resource@1.6.8:
+  version "1.6.8"
+  resolved "https://registry.yarnpkg.com/angular-resource/-/angular-resource-1.6.8.tgz#cc2172f8ec4a3a8340c43c600a5fed543e4168af"
 
-angular-route@1.5.11:
-  version "1.5.11"
-  resolved "https://registry.yarnpkg.com/angular-route/-/angular-route-1.5.11.tgz#49614f3a167f54291e449fe8ba05d39c58924b83"
+angular-route@1.6.8:
+  version "1.6.8"
+  resolved "https://registry.yarnpkg.com/angular-route/-/angular-route-1.6.8.tgz#82ace773e7b232bf77768370760244a8caab5d36"
 
-angular-sanitize@1.5.11:
-  version "1.5.11"
-  resolved "https://registry.yarnpkg.com/angular-sanitize/-/angular-sanitize-1.5.11.tgz#ebfb3f343e543f9b2ef050fb4c2e9ee048d1772f"
+angular-sanitize@1.6.8:
+  version "1.6.8"
+  resolved "https://registry.yarnpkg.com/angular-sanitize/-/angular-sanitize-1.6.8.tgz#68175a1a5853a6439fffcb251a88a538a44a8e70"
 
 angular-toarrayfilter@1.0.3:
   version "1.0.3"
@@ -146,11 +146,7 @@ angular1-ui-bootstrap4@2.4.22:
   version "2.4.22"
   resolved "https://registry.yarnpkg.com/angular1-ui-bootstrap4/-/angular1-ui-bootstrap4-2.4.22.tgz#378697405c957b96f947f42322f36660cd3fc88d"
 
-angular@1.5.11:
-  version "1.5.11"
-  resolved "https://registry.yarnpkg.com/angular/-/angular-1.5.11.tgz#8c5ba7386f15965c9acf3429f6881553aada30d6"
-
-angular@^1.0.8:
+angular@1.6.8, angular@^1.0.8:
   version "1.6.8"
   resolved "https://registry.yarnpkg.com/angular/-/angular-1.6.8.tgz#5be378a58be91a5489e78b59c4518cd9fd273ffb"