diff --git a/README.md b/README.md
index c70c0ba316eebe48e8fc12b57a3cff97dd010291..892e23b0ec9383430faef79002ac33f1741569fd 100644
--- a/README.md
+++ b/README.md
@@ -42,11 +42,11 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 
 ## Access to D-SI XSD version 2.1.0
 
-* D-SI XSD version 2.1.0 @ [https://www.ptb.de/si/v2.0.0/SI_Format.xsd](https://www.ptb.de/si/v2.1.0/SI_Format.xsd)
+* D-SI XSD version 2.1.0 @ [https://www.ptb.de/si/v2.1.0/SI_Format.xsd](https://www.ptb.de/si/v2.1.0/SI_Format.xsd)
 
 * Latest D-SI XSD version @ [https://www.ptb.de/si/SI_Format.xsd](https://www.ptb.de/si/SI_Format.xsd)
 
-* XSD for D-SI example files [https://www.ptb.de/si/v2.0.0/examples/SI_Format_TestData.xsd](https://www.ptb.de/si/v2.1.0/examples/SI_Format_TestData.xsd)
+* XSD for D-SI example files [https://www.ptb.de/si/v2.1.0/examples/SI_Format_TestData.xsd](https://www.ptb.de/si/v2.1.0/examples/SI_Format_TestData.xsd)
 
 
 ## Development