diff --git a/xournalpp.spec b/xournalpp.spec
index bc9a911..5f6fab4 100644
--- a/xournalpp.spec
+++ b/xournalpp.spec
@@ -15,6 +15,11 @@ BuildRequires:  desktop-file-utils
 BuildRequires:  gcc-c++
 BuildRequires:  gettext
 BuildRequires:  libappstream-glib
+  
+# Work around firefox carrying bogus Provides:
+# https://bugzilla.redhat.com/show_bug.cgi?id=1908018#c12
+BuildRequires: nss nspr 
+
 %{?_with_cppunit:
 BuildRequires:  pkgconfig(cppunit) >= 1.12-0
 }
@@ -109,6 +114,7 @@ appstream-util validate-relax --nonet %{buildroot}%{_metainfodir}/com.github.%{n
 %changelog
 * Fri Dec 18 2020 Fedora Release Monitoring <release-monitoring@fedoraproject.org> - 1.0.20-1
 - Update to 1.0.20 (#1908932)
+- Work around firefox carrying bogus Provides
 
 * Fri Oct 23 2020 Luya Tshimbalanga <luya@fedoraproject.org> - 1.0.19-2
 - Replace old xournal thumbnail with xournalpp version