diff --git a/Prologue/Prologue.ipynb b/Prologue/Prologue.ipynb
index 0f6284b5..0c848382 100644
--- a/Prologue/Prologue.ipynb
+++ b/Prologue/Prologue.ipynb
@@ -42,14 +42,14 @@
       "\n",
       "The choice of PyMC as the probabilistic programming language is two-fold. As of this writing, there is currently no central resource for examples and explanations in the PyMC universe. The official documentation assumes prior knowledge of Bayesian inference and probabilistic programming. We hope this book encourages users at every level to look at PyMC. Secondly, with recent core developments and popularity of the scientific stack in Python, PyMC is likely to become a core component soon enough.\n",
       "\n",
-      "PyMC does have dependencies to run, namely NumPy and (optionally) SciPy. To not limit the user, the examples in this book will rely only on PyMC, NumPy, SciPy and Matplotlib only.\n",
+      "PyMC does have dependencies to run, namely NumPy and (optionally) SciPy. To not limit the user, the examples in this book will rely only on PyMC, NumPy, SciPy and Matplotlib.\n",
       "\n",
       "\n",
       "Contents\n",
       "------\n",
       "\n",
       "(The below chapters are rendered via the *nbviewer* at\n",
-      "[nbviewer.ipython.org/](http://nbviewer.ipython.org/), and is read-only and rendered in real-time.\n",
+      "[nbviewer.ipython.org/](http://nbviewer.ipython.org/), and are read-only and rendered in real-time.\n",
       "Interactive notebooks + examples can be downloaded by cloning! )\n",
       "\n",
       "\n",
@@ -282,4 +282,4 @@
    "metadata": {}
   }
  ]
-}
\ No newline at end of file
+}