diff --git a/ecj.spec b/ecj.spec
index 8b77c41..71ad59c 100644
--- a/ecj.spec
+++ b/ecj.spec
@@ -1,14 +1,14 @@
 Epoch: 1
 
-%global eclipse_ver 4.22
-%global bundle_ver 3.28.0
-%global jar_ver %{eclipse_ver}RC2
-%global drop S-%{jar_ver}-202111241800
+%global eclipse_ver 4.23
+%global bundle_ver 3.29.0
+%global jar_ver %{eclipse_ver}
+%global drop R-%{jar_ver}-202203080310
 
 Summary: Eclipse Compiler for Java
 Name: ecj
 Version: %{eclipse_ver}
-Release: 3%{?dist}
+Release: 1%{?dist}
 URL: https://www.eclipse.org
 License: EPL-2.0
 
@@ -66,6 +66,9 @@ install -m 644 -p ecj.1 $RPM_BUILD_ROOT%{_mandir}/man1/ecj.1
 %{_mandir}/man1/ecj*
 
 %changelog
+* Fri Apr 01 2022 Mat Booth <mat.booth@gmail.com> - 1:4.23-1
+- Update to latest upstream release
+
 * Sat Feb 05 2022 Jiri Vanek <jvanek@redhat.com> - 1:4.22-3
 - Rebuilt for java-17-openjdk as system jdk
 
diff --git a/sources b/sources
index 0680c73..f543654 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (ecj-3.28.0.pom) = 3a3d35abe326323dc76228bcc198c9efbe77ef8f1e233a1d7f051a9fe5f3e619781ddbbf1ca22c180d006a32f9a6ea9c0bffc6f9cb984b911a16dbeb6af7e7c7
-SHA512 (ecjsrc-4.22RC2.jar) = cd52a72aecded032625ee83581ac565e1e96f8d26ecfc76e982274fd3d6238f1e7f22576855589b021e9a5ef67686b9b75e010c4e2033a8b7f6e7c9b1ff7eb4c
+SHA512 (ecj-3.29.0.pom) = ede260b2acae642035e277488e35aeab79aa83365b496fb5d377d4be5d3facc8eb39821e379f58a7a632c9b46fee275e200e77986dda09150b49da788edae52a
+SHA512 (ecjsrc-4.23.jar) = 3b0dcbfb0d35363987daa93bb1d0aedeeff8c7b871f11b51af91cbcbbde0d9118dfcc754504019ae13f9621cd11c8f63cafd7fa7cfbdea65a9d6dc66aab00dd6