diff --git a/.gitignore b/.gitignore
index 9bb8f50..7a2729b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,6 @@
 /Setzer-0.4.8.tar.gz
 /Setzer-55.tar.gz
 /Setzer-56.tar.gz
+/Setzer-59.tar.gz
+/Setzer-65.tar.gz
+/Setzer-66.tar.gz
diff --git a/setzer.spec b/setzer.spec
index c6b608f..0f6a397 100644
--- a/setzer.spec
+++ b/setzer.spec
@@ -2,13 +2,14 @@
 %global uuid        org.cvfosammmm.Setzer
 
 Name:           setzer
-Version:        56
+Version:        66
 Release:        %autorelease
 Summary:        LaTeX editor written in Python with Gtk
 
 %forgemeta
 
-License:        GPLv3+
+# Automatically converted from old format: GPLv3+ - review is highly recommended.
+License:        GPL-3.0-or-later
 URL:            https://www.cvfosammmm.org/setzer/
 Source0:        %{forgesource}
 BuildArch:      noarch
@@ -20,29 +21,35 @@ BuildRequires:  libappstream-glib
 BuildRequires:  meson
 BuildRequires:  python3-devel
 
-BuildRequires:  gtk3-devel
-BuildRequires:  gtksourceview4-devel
-BuildRequires:  libhandy-devel
+BuildRequires:  gtk4-devel
+BuildRequires:  gtksourceview5-devel
+BuildRequires:  libadwaita-devel
 BuildRequires:  libportal-devel
 BuildRequires:  gspell-devel
+BuildRequires:  pango-devel
 BuildRequires:  poppler-glib-devel
 BuildRequires:  python3-bibtexparser
 BuildRequires:  python3-cairo
 BuildRequires:  python3-gobject-devel
+BuildRequires:  python3-numpy
 BuildRequires:  python3-pexpect
-BuildRequires:  webkit2gtk4.1
-Requires:       gtk3
-Requires:       gtksourceview4
-Requires:       libhandy
+BuildRequires:  python3-willow
+BuildRequires:  webkitgtk6.0
+Requires:       gtk4
+Requires:       gtksourceview5
+Requires:       libadwaita
 Requires:       libportal
 Requires:       gspell
 Requires:       hicolor-icon-theme
+Requires:       pango
 Requires:       poppler-glib
 Requires:       python3-bibtexparser
 Requires:       python3-cairo
 Requires:       python3-gobject
+Requires:       python3-numpy
 Requires:       python3-pexpect
-Requires:       webkit2gtk4.1
+Requires:       python3-willow
+Requires:       webkitgtk6.0
 
 Requires:       texlive
 Requires:       texlive-synctex
diff --git a/sources b/sources
index 3e990e0..486f0e8 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (Setzer-56.tar.gz) = e5654adf3ec85d4d3aacb6cc463c0ea7a05534d6b4258bb7efbb83556bfd6124cb3161cbe118f09d6e1c8137f8d3faecade3345916cfd6c6b18df1b47caf8eb8
+SHA512 (Setzer-66.tar.gz) = 915cac043ae3cc8b1c24327bc46af2f1c45519e84b1579f7609884afad70f007302a15cd30aa7f04acc1a860e608f3b872e82bb92d1f806c1d3e898666928123