diff --git a/json-java.changes b/json-java.changes
index 574c373..20456b7 100644
--- a/json-java.changes
+++ b/json-java.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Sep 13 05:28:58 UTC 2023 - Fridrich Strba <fstrba@suse.com>
+
+- Reproducible builds: use SOURCE_DATE_EPOCH for timestamp
+
 -------------------------------------------------------------------
 Tue Mar 22 15:29:20 UTC 2022 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/json-java.spec b/json-java.spec
index 82c6157..08fcb76 100644
--- a/json-java.spec
+++ b/json-java.spec
@@ -49,6 +49,7 @@ This package contains the API documentation for %{name}.
 %if %{?pkg_vcmp:%pkg_vcmp java-devel >= 9}%{!?pkg_vcmp:0}
     -Dmaven.compiler.release=8 \
 %endif
+    -Dproject.build.outputTimestamp=$(date -u -d @${SOURCE_DATE_EPOCH:-$(date +%%s)} +%%Y-%%m-%%dT%%H:%%M:%%SZ) \
     -Dsource=8
 
 %install