diff --git a/configure.ac b/configure.ac
index 5c37e481147466fd5a3a0a6b814f20fd2fe6bce8..5cedb4eca980f050fb5855ab577e93100adf8fec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,7 +79,7 @@ PKG_CHECK_MODULES(GLIB, [gmodule-2.0 gio-unix-2.0 >= 2.30.0])
 AC_SUBST(GLIB_CFLAGS)
 AC_SUBST(GLIB_LIBS)
 
-PKG_CHECK_MODULES(LIBJS, [mozjs-52])
+PKG_CHECK_MODULES(LIBJS, [mozjs-60])
 
 AC_SUBST(LIBJS_CFLAGS)
 AC_SUBST(LIBJS_CXXFLAGS)
diff --git a/src/polkitbackend/polkitbackendjsauthority.cpp b/src/polkitbackend/polkitbackendjsauthority.cpp
index 76027149d4dfdc54064be48a3aeafeec8326a67b..984a0f0e579d51c09117f4e495b0c3fdc46fe61b 100644
--- a/src/polkitbackend/polkitbackendjsauthority.cpp
+++ b/src/polkitbackend/polkitbackendjsauthority.cpp
@@ -150,18 +150,17 @@ G_DEFINE_TYPE (PolkitBackendJsAuthority, polkit_backend_js_authority, POLKIT_BAC
 /* ---------------------------------------------------------------------------------------------------- */
 
 static const struct JSClassOps js_global_class_ops = {
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL
+  nullptr,  // addProperty
+  nullptr,  // deleteProperty
+  nullptr,  // enumerate
+  nullptr,  // newEnumerate
+  nullptr,  // resolve
+  nullptr,  // mayResolve
+  nullptr,  // finalize
+  nullptr,  // call
+  nullptr,  // hasInstance
+  nullptr,  // construct
+  JS_GlobalObjectTraceHook
 };
 
 static JSClass js_global_class = {
@@ -172,18 +171,17 @@ static JSClass js_global_class = {
 
 /* ---------------------------------------------------------------------------------------------------- */
 static const struct JSClassOps js_polkit_class_ops = {
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL
+  nullptr,  // addProperty
+  nullptr,  // deleteProperty
+  nullptr,  // enumerate
+  nullptr,  // newEnumerate
+  nullptr,  // resolve
+  nullptr,  // mayResolve
+  nullptr,  // finalize
+  nullptr,  // call
+  nullptr,  // hasInstance
+  nullptr,  // construct
+  nullptr   // trace
 };
 
 static JSClass js_polkit_class = {
@@ -469,19 +467,18 @@ polkit_backend_js_authority_constructed (GObject *object)
 
   {
     JS::CompartmentOptions compart_opts;
-    compart_opts.behaviors().setVersion(JSVERSION_LATEST);
+
     JS::RootedObject global(authority->priv->cx);
 
     authority->priv->js_global = new JS::Heap<JSObject*> (JS_NewGlobalObject (authority->priv->cx, &js_global_class, NULL, JS::FireOnNewGlobalHook, compart_opts));
 
     global = authority->priv->js_global->get ();
-
-    if (global == NULL)
+    if (!global)
       goto fail;
 
     authority->priv->ac = new JSAutoCompartment(authority->priv->cx,  global);
 
-    if (authority->priv->ac == NULL)
+    if (!authority->priv->ac)
       goto fail;
 
     if (!JS_InitStandardClasses (authority->priv->cx, global))
@@ -493,7 +490,7 @@ polkit_backend_js_authority_constructed (GObject *object)
 
     polkit = authority->priv->js_polkit->get ();
 
-    if (polkit == NULL)
+    if (!polkit)
       goto fail;
 
     if (!JS_DefineProperty(authority->priv->cx, global, "polkit", polkit, JSPROP_ENUMERATE))
@@ -504,7 +501,7 @@ polkit_backend_js_authority_constructed (GObject *object)
                              js_polkit_functions))
       goto fail;
 
-    JS::CompileOptions options(authority->priv->cx, JSVERSION_UNKNOWN);
+    JS::CompileOptions options(authority->priv->cx);
     JS::RootedValue rval(authority->priv->cx);
     if (!JS::Evaluate (authority->priv->cx,
                        options,
@@ -684,7 +681,9 @@ set_property_strv (PolkitBackendJsAuthority  *authority,
   JS::AutoValueVector elems(authority->priv->cx);
   guint n;
 
-  elems.resize(value->len);
+  if (!elems.resize(value->len))
+    g_error ("Unable to resize vector");
+
   for (n = 0; n < value->len; n++)
     {
       const char *c_string = (const char *) g_ptr_array_index(value, n);
@@ -741,7 +740,7 @@ subject_to_jsval (PolkitBackendJsAuthority  *authority,
                   GError                   **error)
 {
   gboolean ret = FALSE;
-  JS::CompileOptions options(authority->priv->cx, JSVERSION_UNKNOWN);
+  JS::CompileOptions options(authority->priv->cx);
   const char *src;
   JS::RootedObject obj(authority->priv->cx);
   pid_t pid;
@@ -868,7 +867,7 @@ action_and_details_to_jsval (PolkitBackendJsAuthority  *authority,
                              GError                   **error)
 {
   gboolean ret = FALSE;
-  JS::CompileOptions options(authority->priv->cx, JSVERSION_UNKNOWN);
+  JS::CompileOptions options(authority->priv->cx);
   const char *src;
   JS::RootedObject obj(authority->priv->cx);
   gchar **keys;