diff --git a/.gitignore b/.gitignore
index 962743e..82d28ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -78,5 +78,3 @@ iso-codes-3.19.tar.bz2
 /iso-codes-v4.16.0.tar.gz
 /iso-codes-v4.17.0.tar.gz
 /iso-codes-v4.18.0.tar.gz
-/iso-codes-v4.19.0.tar.gz
-/iso-codes-v4.20.1.tar.gz
diff --git a/iso-codes.spec b/iso-codes.spec
index f7eb53a..4ba68f5 100644
--- a/iso-codes.spec
+++ b/iso-codes.spec
@@ -1,6 +1,6 @@
 Name:       iso-codes
 Summary:    ISO code lists and translations
-Version:    4.20.1
+Version:    4.18.0
 Release:    2%{?dist}
 License:    LGPL-2.1-or-later
 URL:        https://salsa.debian.org/iso-codes-team/iso-codes
@@ -8,7 +8,7 @@ Source0:    https://salsa.debian.org/iso-codes-team/%{name}/-/archive/v%{version
 
 BuildRequires: gettext
 BuildRequires: python3
-BuildRequires: meson
+BuildRequires: make
 BuildArch: noarch
 
 # for /usr/share/xml
@@ -35,20 +35,17 @@ when building programs that use %{name}.
 sed -i 's/ & / and /g' data/iso_3166-2.json
 
 %build
-%meson
-%meson_build
+%configure
+%make_build
 
 %install
-%meson_install
-
-%check
-%meson_test
+%make_install INSTALL="%{__install} -p"
 
 %find_lang %{name} --all-name
 
 %files -f %{name}.lang
 %doc CHANGELOG.md README.md
-%license LICENSES/LGPL-2.1-or-later.txt
+%license COPYING
 %dir %{_datadir}/xml/iso-codes
 %{_datadir}/xml/iso-codes/*.xml
 %{_datadir}/iso-codes
@@ -57,15 +54,6 @@ sed -i 's/ & / and /g' data/iso_3166-2.json
 %{_datadir}/pkgconfig/iso-codes.pc
 
 %changelog
-* Fri Jan 02 2026 Parag Nemade <pnemade AT redhat DOT com> - 4.20.1-2
-- Upstream moved to meson build system 
-
-* Fri Jan 02 2026 Parag Nemade <pnemade AT redhat DOT com> - 4.20.1-1
-- Update to 4.20.1 version (#2426701)
-
-* Fri Nov 14 2025 Parag Nemade <pnemade AT redhat DOT com> - 4.19.0-1
-- Update to 4.19.0 version (#2413657)
-
 * Thu Jul 24 2025 Fedora Release Engineering <releng@fedoraproject.org> - 4.18.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
 
diff --git a/sources b/sources
index 0f9fd89..865aba3 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (iso-codes-v4.20.1.tar.gz) = 2b5690b109da3d4f969c62f1a9653f6a12f6529794b97d0c834d708ff9a407bc0193047992b2acea7525f4638a68dbd9a6dceec8b0b0d08f23a2fd2e3124b1d2
+SHA512 (iso-codes-v4.18.0.tar.gz) = 4f9766b3e73a155df3213d5684f0b4c2aefe3efcdc30b2a969913a90deb73e1cbd32a63c2f00c736517c1feed790944d12155410d3c4d381749c39ecd1f71f96