diff --git a/Appendix-A-Installation.ipynb b/Appendix-A-Installation.ipynb
index d0ec3e6..632cbc4 100644
--- a/Appendix-A-Installation.ipynb
+++ b/Appendix-A-Installation.ipynb
@@ -351,7 +351,7 @@
     "Now, from the command prompt change to the directory that was just created, and then run Jupyter notebook:\n",
     "\n",
     "    cd Kalman-and-Bayesian-Filters-in-Python\n",
-    "    juptyer notebook\n",
+    "    jupyter notebook\n",
     "\n",
     "A browser window should launch showing you all of the chapters in the book. Browse to the first chapter by clicking on it, then open the notebook in that subdirectory by clicking on the link.\n",
     "\n",
@@ -386,7 +386,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Using Juptyer Notebook"
+    "## Using Jupyter Notebook"
    ]
   },
   {