diff --git a/README.md b/README.md
index e3f5c112e40815673c37866775a426f018169b6f..b14967a63b6dbdb95303e60fadd8237bcfcd78d4 100644
--- a/README.md
+++ b/README.md
@@ -166,9 +166,9 @@ GROMACS supports all the usual algorithms you expect from a modern molecular dyn
       <li><a href="http://www.ks.uiuc.edu/Research/namd/">website</a></li>
       <li><a href="http://www.ks.uiuc.edu/Development/Download/download.cgi?PackageName=NAMD">Source code</a></li>
       <li><a href="https://repository.prace-ri.eu/git/UEABS/ueabs/-/tree/r2.2-dev/namd">Build and Run Instructions</a></li>
-      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseA.tar.xz">Test Case A</a></li>
-      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseB.tar.xz">Test Case B</a></li>
-      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseC.tar.xz">Test Case C</a></li>
+      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseA.tar.gz">Test Case A</a></li>
+      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseB.tar.gz">Test Case B</a></li>
+      <li><a href="https://repository.prace-ri.eu/ueabs/NAMD/2.2/NAMD_TestCaseC.tar.gz">Test Case C</a></li>
       </ul>
       </td>
       <td>887,547</td>