diff --git a/.gitignore b/.gitignore
index 559e09f..cee75bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /oidn-1.2.0.src.tar.gz
 /oidn-1.2.1.src.tar.gz
 /oidn-1.2.2.src.tar.gz
+/oidn-1.2.3.src.tar.gz
diff --git a/oidn.spec b/oidn.spec
index 034b5ae..961201a 100644
--- a/oidn.spec
+++ b/oidn.spec
@@ -1,6 +1,9 @@
+# Force out of source build
+%undefine __cmake_in_source_build
+
 Name:       oidn
-Version:    1.2.2
-Release:    4%{?dist}
+Version:    1.2.3
+Release:    1%{?dist}
 Summary:    Library of denoising filters for images rendered with ray tracing
 License:    ASL 2.0
 URL:        https://openimagedenoise.github.io/
@@ -48,14 +51,13 @@ The %{name}-docs package contains documentation for %{name}.
 
 %build
 %cmake \
-    -B build \
     -DCMAKE_VERBOSE_MAKEFILE:BOOL=TRUE \
     .
 
-%make_build -C build
+%cmake_build
 
 %install
-%make_install -C build
+%cmake_install
 
 # Remove duplicated documentation
 rm -rf %{buildroot}%{_docdir}/OpenImageDenoise
@@ -77,6 +79,10 @@ rm -rf %{buildroot}%{_docdir}/OpenImageDenoise
 %{_libdir}/libOpenImageDenoise.so
 
 %changelog
+* Sun Sep 13 2020 Luya Tshimbalanga <luya@fedoraproject.org> - 1.2.3-1
+- Update to 1.2.3
+- Follow new Fedora cmake guideline
+
 * Thu Aug 20 2020 Simone Caronni <negativo17@gmail.com> - 1.2.2-4
 - Move cmake files to devel subpackage.
 - rpmlint fixes.
diff --git a/sources b/sources
index e64b032..b45b692 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (oidn-1.2.2.src.tar.gz) = 8fc6b989ec412f9ebf19f1d2519ea5ceebb5bd776622282ec52dd92381efc00714e80b73f45102cee520c6151eb54af7c69b9e151050869d7c153d1f253d8d14
+SHA512 (oidn-1.2.3.src.tar.gz) = e21ff2e7166d27b7800f08f77d786557be12f17da899b57ee809c3b416f02438601da5e99dbeebc433e781246913f9a697354937845adb40151d7bea21200c7b