diff --git a/polkit.spec b/polkit.spec
index 5ce1b77..11399b3 100644
--- a/polkit.spec
+++ b/polkit.spec
@@ -4,7 +4,7 @@
 Summary: An authorization framework
 Name: polkit
 Version: 121
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: LGPLv2+
 URL: http://www.freedesktop.org/wiki/Software/polkit
 Source0: http://www.freedesktop.org/software/polkit/releases/%{name}-%{version}.tar.xz
@@ -19,7 +19,7 @@ BuildRequires: gettext-devel
 BuildRequires: gobject-introspection-devel
 BuildRequires: systemd, systemd-devel
 BuildRequires: dbus-devel
-BuildRequires: pkgconfig(duktape)
+BuildRequires: pkgconfig(mozjs-91)
 BuildRequires: meson
 BuildRequires: git
 
@@ -41,7 +41,7 @@ Conflicts: polkit-gnome < 0.97
 Obsoletes: polkit-desktop-policy < 0.103
 Provides: polkit-desktop-policy = 0.103
 
-Obsoletes: polkit-js-engine < 0.120-5
+Obsoletes: polkit-js-engine < 0.110-4
 Provides: polkit-js-engine = %{version}-%{release}
 
 # when -libs was split out, handle multilib upgrade path -- rex
@@ -90,7 +90,8 @@ Libraries files for polkit.
        -D introspection=true \
        -D man=true \
        -D session_tracking=libsystemd-login \
-       -D tests=false
+       -D tests=false \
+       -D js_engine=mozjs
 
 %meson_build
 
@@ -162,6 +163,10 @@ exit 0
 %{_libdir}/girepository-1.0/*.typelib
 
 %changelog
+* Tue Aug 02 2022 Jan Rybar <jrybar@redhat.com> - 121-3
+- switched back to mozjs until problems with duktape are fixed
+- Related: bz#2109145
+
 * Fri Jul 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 121-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild