diff --git a/xmlstreambuffer.changes b/xmlstreambuffer.changes
index 40c911e..97637e0 100644
--- a/xmlstreambuffer.changes
+++ b/xmlstreambuffer.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Sep 12 12:51:36 UTC 2023 - Fridrich Strba <fstrba@suse.com>
+
+- Reproducible builds: use SOURCE_DATE_EPOCH for timestamp
+
 -------------------------------------------------------------------
 Wed Mar 23 05:57:56 UTC 2022 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/xmlstreambuffer.spec b/xmlstreambuffer.spec
index 914a8e1..39b2a93 100644
--- a/xmlstreambuffer.spec
+++ b/xmlstreambuffer.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package xmlstreambuffer
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -82,9 +82,10 @@ rm -r test/com/sun/xml/stream/buffer/stax/InscopeNamespaceTest.java
 
 %{mvn_build} -f -- \
 %if %{?pkg_vcmp:%pkg_vcmp java-devel >= 9}%{!?pkg_vcmp:0}
-	-Dmaven.compiler.release=8 \
+    -Dmaven.compiler.release=8 \
 %endif
-	-Dsource=8
+    -Dproject.build.outputTimestamp=$(date -u -d @${SOURCE_DATE_EPOCH:-$(date +%%s)} +%%Y-%%m-%%dT%%H:%%M:%%SZ) \
+    -Dsource=8
 
 %install
 %mvn_install