diff --git a/json-simple.changes b/json-simple.changes
index f7e2c0f..f265c1e 100644
--- a/json-simple.changes
+++ b/json-simple.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Sep 13 05:24:18 UTC 2023 - Fridrich Strba <fstrba@suse.com>
+
+- Reproducible builds: use SOURCE_DATE_EPOCH for timestamp
+
 -------------------------------------------------------------------
 Tue Mar 28 08:51:41 UTC 2023 - John Vandenberg <jayvdb@gmail.com>
 
diff --git a/json-simple.spec b/json-simple.spec
index 7737b42..0bdd3bb 100644
--- a/json-simple.spec
+++ b/json-simple.spec
@@ -69,7 +69,9 @@ find . -type f -exec sed -i 's/\r//' {} \;
 %{mvn_file} : %{name}
 
 %build
-%{mvn_build} -f -- -Dmaven.compiler.source=1.8 -Dmaven.compiler.target=1.8
+%{mvn_build} -f -- \
+    -Dproject.build.outputTimestamp=$(date -u -d @${SOURCE_DATE_EPOCH:-$(date +%%s)} +%%Y-%%m-%%dT%%H:%%M:%%SZ) \
+    -Dmaven.compiler.source=1.8 -Dmaven.compiler.target=1.8
 
 %install
 %mvn_install