diff --git a/notebooks/3-imdb.ipynb b/notebooks/3-imdb.ipynb
index 8e95712d..29d17cff 100644
--- a/notebooks/3-imdb.ipynb
+++ b/notebooks/3-imdb.ipynb
@@ -173,7 +173,7 @@
         "word_to_integer = tf.keras.datasets.imdb.get_word_index()\n",
         "\n",
         "# Print out the first ten keys in the dictionary\n",
-        "print(word_to_integer.keys()[0:10])\n",
+        "print(list(word_to_integer.keys())[0:10])\n",
         "\n",
         "integer_to_word = dict([(value, key) for (key, value) in word_to_integer.items()])\n",
         "\n",
diff --git a/notebooks/4-reuters.ipynb b/notebooks/4-reuters.ipynb
index 69ed4e08..7b13d75d 100644
--- a/notebooks/4-reuters.ipynb
+++ b/notebooks/4-reuters.ipynb
@@ -158,7 +158,7 @@
       },
       "cell_type": "code",
       "source": [
-        "print(word_to_integer.keys()[0:10])\n",
+        "print(list(word_to_integer.keys())[0:10])\n",
         "\n",
         "integer_to_word = dict([(value, key) for (key, value) in word_to_integer.items()])\n",
         "\n",