diff --git a/jdk21rounding.patch b/jdk21rounding.patch
new file mode 100644
index 0000000..ce4aa18
--- /dev/null
+++ b/jdk21rounding.patch
@@ -0,0 +1,12 @@
+--- parserng-0.1.9/src/test/java/parser/methods/ext/FloorCeilTests.java
++++ parserng-0.1.9/src/test/java/parser/methods/ext/FloorCeilTests.java
+@@ -353,7 +353,7 @@
+     void fracPreReqNonStat1() {
+         MathExpression me;
+         me = new MathExpression("sin(3/2)");
+-        Assertions.assertEquals("0.9974949866040544", me.solve());
++        Assertions.assertEquals("0.9974949866040544", me.solve());
+     }
+ 
+     @Test
+
diff --git a/parserng.spec b/parserng.spec
index fcbee18..0385756 100644
--- a/parserng.spec
+++ b/parserng.spec
@@ -2,8 +2,9 @@ Summary: %{nice_name} is a powerful open-source tool that parses and evaluates a
 %global nice_name ParserNG
 Name: parserng
 Version: 0.1.9
-Release: 2%{?dist}
-License: ASL 2.0
+Release: 11%{?dist}
+# Automatically converted from old format: ASL 2.0 - review is highly recommended.
+License: Apache-2.0
 URL: https://github.com/gbenroscience/ParserNG
 # tarred cloned repo without hidden files and without idea iml
 # usptream do not tag, but uses maven versionining
@@ -12,11 +13,12 @@ URL: https://github.com/gbenroscience/ParserNG
 # git clone https://github.com/gbenroscience/ParserNG &&  cd ParserNG  && git checkout f619fad1fefa21116bab4a0abba2dd0ebe719e45 && tar -cJf parserng-0.1.9.tar.xz *
 Source0: %{name}-%{version}.tar.xz
 Source1: parserng
+Patch1: jdk21rounding.patch
 
 BuildArch: noarch
 ExclusiveArch:  %{java_arches} noarch
 
-BuildRequires: maven-local
+BuildRequires: maven-local-openjdk25
 BuildRequires: junit5
 BuildRequires: ant-junit5
 BuildRequires: junit
@@ -26,8 +28,8 @@ BuildRequires: maven-surefire-provider-junit5
 BuildRequires: maven-surefire
 BuildRequires: maven-surefire-plugin
 BuildRequires: maven-clean-plugin
-BuildRequires: java-devel
-Requires: java-headless
+BuildRequires: java-25-devel
+Requires: java-25-headless
 Provides: ParserNG
 Provides: parser-ng
 
@@ -46,7 +48,11 @@ This package contains the API documentation for %{name}.
 
 %prep
 %setup -c %{name}-%{version}
-
+%patch -P1 -p1
+for x in `find | grep pom.xml` ; do
+    sed "s;<maven.compiler.source>.*7.*;<maven.compiler.source>8</maven.compiler.source>;g" -i $x;
+    sed "s;<maven.compiler.target>.*7.*;<maven.compiler.target>8</maven.compiler.target>;g" -i $x;
+done
 
 %build
 %pom_remove_plugin :maven-jar-plugin
@@ -70,6 +76,35 @@ install -d -m 755 $RPM_BUILD_ROOT%{_sysconfdir}/%{name}/
 %license LICENSE
 
 %changelog
+* Mon Jul 28 2025 jiri vanek <jvanek@redhat.com> - 0.1.9-11
+- Rebuilt for java-25-openjdk as preffered jdk
+
+* Thu Jul 24 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-10
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Fri Jan 17 2025 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-9
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
+* Wed Jul 24 2024 Miroslav Suchý <msuchy@redhat.com> - 0.1.9-8
+- convert license to SPDX
+
+* Thu Jul 18 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-7
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild
+
+* Tue Feb 27 2024 Jiri Vanek <jvanek@redhat.com> - 0.1.9-6
+- Rebuilt for java-21-openjdk as system jdk
+- fixed source/target
+- added patch to cover slightly different rounding on jdk21
+
+* Thu Jan 25 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Sun Jan 21 2024 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Thu Jul 20 2023 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.9-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild
+
 * Thu Jan 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.8-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild