diff --git a/ch03/ch03.ipynb b/ch03/ch03.ipynb
index 8b7ace53..19a9dd54 100644
--- a/ch03/ch03.ipynb
+++ b/ch03/ch03.ipynb
@@ -290,7 +290,7 @@
    "source": [
     "**Note**\n",
     "\n",
-    "- You can replace `Perceptron(n_iter, ...)` by `Perceptron(max_iter, ...)` in scikit-learn >= 0.19. The `n_iter` parameter is used here deriberately, because some people still use scikit-learn 0.18."
+    "- You can replace `Perceptron(n_iter, ...)` by `Perceptron(max_iter, ...)` in scikit-learn >= 0.19. The `n_iter` parameter is used here deliberately, because some people still use scikit-learn 0.18."
    ]
   },
   {
diff --git a/ch03/ch03.py b/ch03/ch03.py
index 806fb491..91005b35 100644
--- a/ch03/ch03.py
+++ b/ch03/ch03.py
@@ -131,7 +131,7 @@
 
 # **Note**
 # 
-# - You can replace `Perceptron(n_iter, ...)` by `Perceptron(max_iter, ...)` in scikit-learn >= 0.19. The `n_iter` parameter is used here deriberately, because some people still use scikit-learn 0.18.
+# - You can replace `Perceptron(n_iter, ...)` by `Perceptron(max_iter, ...)` in scikit-learn >= 0.19. The `n_iter` parameter is used here deliberately, because some people still use scikit-learn 0.18.