diff --git a/Notebooks/Chap19/19_1_Markov_Decision_Processes.ipynb b/Notebooks/Chap19/19_1_Markov_Decision_Processes.ipynb
index c5cd6d6..ddac7cc 100644
--- a/Notebooks/Chap19/19_1_Markov_Decision_Processes.ipynb
+++ b/Notebooks/Chap19/19_1_Markov_Decision_Processes.ipynb
@@ -598,7 +598,7 @@
       "source": [
         "def markov_decision_process_step_deterministic(state, transition_probabilities_given_action, reward_structure, policy):\n",
         "  # TODO -- complete this function.\n",
-        "  # For each state, theres is a corresponding action.\n",
+        "  # For each state, there's is a corresponding action.\n",
         "  # Draw the next state based on the current state and that action\n",
         "  # and calculate the reward\n",
         "  # Replace this line:\n",
@@ -683,7 +683,7 @@
       "source": [
         "def markov_decision_process_step_stochastic(state, transition_probabilities_given_action, reward_structure, stochastic_policy):\n",
         "  # TODO -- complete this function.\n",
-        "  # For each state, theres is a corresponding distribution over actions\n",
+        "  # For each state, there's is a corresponding distribution over actions\n",
         "  # Draw a sample from that distribution to get the action\n",
         "  # Draw the next state based on the current state and that action\n",
         "  # and calculate the reward\n",
@@ -733,4 +733,4 @@
       "outputs": []
     }
   ]
-}
\ No newline at end of file
+}