diff --git a/Tests/Data/Parabolic/ComponentTransport/DiffusionSorptionDecay/DiffusionSorptionDecay.ipynb b/Tests/Data/Parabolic/ComponentTransport/DiffusionSorptionDecay/DiffusionSorptionDecay.ipynb
index 67397ca9e76391e7fbcc99ba9369ad810e20be6e..43004572dac47b7b8abcbe63aea7dd7c231153b3 100644
--- a/Tests/Data/Parabolic/ComponentTransport/DiffusionSorptionDecay/DiffusionSorptionDecay.ipynb
+++ b/Tests/Data/Parabolic/ComponentTransport/DiffusionSorptionDecay/DiffusionSorptionDecay.ipynb
@@ -674,7 +674,7 @@
    "id": "4bbd982b",
    "metadata": {},
    "source": [
-    "<a href=\"https://www.nagra.ch/de/technical-report-02-06\">Nagra, 2002.</a> Project Opalinus Clay: Models, Codes and Data for Safety Assessment. Technical Report NTB 02–06. Nagra, Switzerland.\n",
+    "<a href=\"https://nagra.ch/downloads/technical-report-ntb-02-06/\">Nagra, 2002.</a> Project Opalinus Clay: Models, Codes and Data for Safety Assessment. Technical Report NTB 02–06. Nagra, Switzerland.\n",
     "\n",
     "Carslaw, H. S. & Jaeger, J. C., 1959: Conduction of heat in solids. 2nd Ed., Oxford Science Publications, Clarendon\n",
     "Press, Oxford, UK.\n",