diff --git a/antlr-bootstrap.changes b/antlr-bootstrap.changes
index 632f04a..7623cea 100644
--- a/antlr-bootstrap.changes
+++ b/antlr-bootstrap.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Oct  1 08:04:27 UTC 2024 - Fridrich Strba <fstrba@suse.com>
+
+- Use SOURCE_DATE_EPOCH for reproducible builds
+
 -------------------------------------------------------------------
 Tue Oct 17 11:07:22 UTC 2023 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/antlr-bootstrap.spec b/antlr-bootstrap.spec
index c3913ea..bcbdbeb 100644
--- a/antlr-bootstrap.spec
+++ b/antlr-bootstrap.spec
@@ -82,8 +82,13 @@ function compileFiles() {
 # PARAM#1: name of jar archive (without .jar suffix)
 # uses $TARGET_DIR to move created jar to
 function mkJar() {
-  find  -name "version.txt" -or -name "*.class" -or -name "*.properties" -or -name "*.rsc" -or -name "*manifest*" |\
-    xargs jar cfm ${1}.jar manifest.* ;
+  jar  \
+%if %{?pkg_vcmp:%pkg_vcmp java-devel >= 17}%{!?pkg_vcmp:0}
+    --date="$(date -u -d @${SOURCE_DATE_EPOCH:-$(date +%%s)} +%%Y-%%m-%%dT%%H:%%M:%%SZ)" \
+%endif
+    --create --file=${1}.jar --manifest=$(ls manifest.*) \
+  $(find  -name "version.txt" -or -name "*.class" -or -name "*.properties" -or -name "*.rsc" |\
+    xargs) ;
   mv ${1}.jar $TARGET_DIR
 }
 COMPILER_COMMAND="javac -source 8 -target 8 -cp  "