diff --git a/glassfish-jsp.changes b/glassfish-jsp.changes
index 28bb216..1fcfc97 100644
--- a/glassfish-jsp.changes
+++ b/glassfish-jsp.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Sep  9 13:36:14 UTC 2023 - Fridrich Strba <fstrba@suse.com>
+
+- Reproducible builds: use SOURCE_DATE_EPOCH for timestamp
+
 -------------------------------------------------------------------
 Tue Mar 22 09:19:40 UTC 2022 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/glassfish-jsp.spec b/glassfish-jsp.spec
index 58fca7b..9db7b2a 100644
--- a/glassfish-jsp.spec
+++ b/glassfish-jsp.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package glassfish-jsp
 #
-# 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
@@ -84,7 +84,9 @@ cp -p %{SOURCE2} .
 %{mvn_file} : %{name}/javax.servlet.jsp %{name}
 
 %build
-%{mvn_build} -f -- -Dsource=8
+%{mvn_build} -f -- \
+    -Dproject.build.outputTimestamp=$(date -u -d @${SOURCE_DATE_EPOCH:-$(date +%%s)} +%%Y-%%m-%%dT%%H:%%M:%%SZ) \
+    -Dsource=8
 
 %install
 %mvn_install