diff --git a/notebooks/V10_kalmanfilter_demonstration.ipynb b/notebooks/V10_kalmanfilter_demonstration.ipynb
index 4e273ef0fc82a3dbf96d369c7214e5afae19d0ce..5641ad181bbe8cd5d1b9e4e5bff182f34b5927d8 100644
--- a/notebooks/V10_kalmanfilter_demonstration.ipynb
+++ b/notebooks/V10_kalmanfilter_demonstration.ipynb
@@ -24,7 +24,7 @@
    "id": "anonymous-franklin",
    "metadata": {},
    "source": [
-    "## Der verwendete Kalman-Filter:"
+    "## Das verwendete Kalman-Filter:"
    ]
   },
   {