diff --git a/.gitignore b/.gitignore
index 230f55f..429078b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,5 +17,3 @@
 /alglib-4.03.0.cpp.gpl.tgz
 /alglib-4.04.0.cpp.gpl.tgz
 /alglib-4.05.0.cpp.gpl.tgz
-/alglib-4.06.0.cpp.gpl.tgz
-/alglib-4.07.0.cpp.gpl.tgz
diff --git a/alglib.spec b/alglib.spec
index 3a73cc4..87f06e1 100644
--- a/alglib.spec
+++ b/alglib.spec
@@ -1,6 +1,6 @@
 Name:           alglib
-Version:        4.07.0
-Release:        2%{?dist}
+Version:        4.05.0
+Release:        3%{?dist}
 Summary:        A numerical analysis and data processing library
 
 License:        GPL-2.0-or-later
@@ -35,7 +35,8 @@ developing applications that use %{name}.
 
 %package        doc
 Summary:        API documentation for %{name}
-License:        ALGLIB-Documentation
+# Automatically converted from old format: BSD - review is highly recommended.
+License:        LicenseRef-Callaway-BSD
 BuildArch:      noarch
 
 %description    doc
@@ -67,7 +68,7 @@ sed -i 's|\r||g' manual.cpp.html
 
 %files
 %license gpl2.txt
-%{_libdir}/libalglib.so.4.7.0
+%{_libdir}/libalglib.so.4.5.0
 
 %files devel
 %{_includedir}/%{name}/
@@ -79,15 +80,6 @@ sed -i 's|\r||g' manual.cpp.html
 
 
 %changelog
-* Fri Jan 16 2026 Fedora Release Engineering <releng@fedoraproject.org> - 4.07.0-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
-
-* Mon Dec 29 2025 Sandro Mani <manisandro@gmail.com> - 4.07.0-1
-- Update to 4.07.0
-
-* Thu Oct 09 2025 Sandro Mani <manisandro@gmail.com> - 4.06.0-1
-- Update to 4.06.0
-
 * Wed Jul 23 2025 Fedora Release Engineering <releng@fedoraproject.org> - 4.05.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
 
diff --git a/sources b/sources
index 0594e7e..d07ad82 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (alglib-4.07.0.cpp.gpl.tgz) = abc0a5aecec019eb4fcb5b3a5a95e88ed1154a52f7348f944dee4ebc8079cddfc00de30b45c6a846a201d4064e55dbcad2afe09df5e74d51120f83277704d733
+SHA512 (alglib-4.05.0.cpp.gpl.tgz) = d3919453fcf4ce83d9b35a3d80aed1873d6d72c464b3d2b48cf3c62792a934a3d2c38051293b5f1a7b13f8e79b51a5ab63b2a35cebb6d7797dd2908d0eafd7bd