diff --git a/doc/11-Working-with-the-original-ImageJ.ipynb b/doc/11-Working-with-the-original-ImageJ.ipynb
index ec33e46c..c668f170 100644
--- a/doc/11-Working-with-the-original-ImageJ.ipynb
+++ b/doc/11-Working-with-the-original-ImageJ.ipynb
@@ -5,7 +5,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "This notebook is part of the PyImageJ [Tutorial Series](./notebooks.rst), and assumes familiarity with the ImageJ API. Dedicated tutorials for ImageJ can be found [here](https://imagej.net/tutorials/).S"
+    "This notebook is part of the PyImageJ [Tutorial Series](./notebooks.rst), and assumes familiarity with the ImageJ API. Dedicated tutorials for ImageJ can be found [here](https://imagej.net/tutorials/)."
    ]
   },
   {