diff --git a/build.xml b/build.xml
index 4740e3f..0ff0416 100644
--- a/build.xml
+++ b/build.xml
@@ -21,8 +21,8 @@
     <property name="build.dir" value="build"/>
     <property name="config.dir" value="${build.dir}/config"/>
     <property name="lib.dir" value="lib"/>
-    <property name="saxon.version" value="10.3"/>
-    <property name="schxslt.version" value="1.5.2"/>
+    <property name="saxon.version" value="10.5"/>
+    <property name="schxslt.version" value="1.7.1"/>
     <property name="validationtool.version" value="1.4.1"/>
     <property name="xrechnung.download.url"
               value="https://github.com/itplr-kosit/validator-configuration-xrechnung/releases/download"/>