diff --git a/2-svd-nmf-topic-modeling.ipynb b/2-svd-nmf-topic-modeling.ipynb
index f9d50bf..2f490b5 100644
--- a/2-svd-nmf-topic-modeling.ipynb
+++ b/2-svd-nmf-topic-modeling.ipynb
@@ -350,7 +350,7 @@
     }
    ],
    "source": [
-    "from sklearn.feature_extraction import stop_words\n",
+    "from sklearn.feature_extraction import _stop_words as stop_words\n",
     "\n",
     "sorted(list(stop_words.ENGLISH_STOP_WORDS))[:20]"
    ]
@@ -420,7 +420,8 @@
    ],
    "source": [
     "import nltk\n",
-    "nltk.download('wordnet')"
+    "nltk.download('wordnet')\n",
+    "nltk.download('omw-1.4')"
    ]
   },
   {
@@ -568,8 +569,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from spacy.lemmatizer import Lemmatizer\n",
-    "lemmatizer = Lemmatizer()"
+    "nlp = spacy.load(\"en_core_web_sm\")\n",
+    "doc = nlp(\" \".join(word_list))"
    ]
   },
   {
@@ -589,7 +590,7 @@
     }
    ],
    "source": [
-    "[lemmatizer.lookup(word) for word in word_list]"
+    "[word.text for word in doc]"
    ]
   },
   {
@@ -901,7 +902,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "vocab = np.array(vectorizer.get_feature_names())"
+    "vocab = np.array(vectorizer.get_feature_names_out())"
    ]
   },
   {
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d9088f6
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+# Makefile
+# description: Install virtual environment and libraries to run course notebooks.
+
+PYTHON_VENV = .venv
+
+init: venv lib pipeline
+
+# Install required libraries. 
+lib: 
+	@. $(PYTHON_VENV)/bin/activate && pip install \
+		fbpca \
+		matplotlib \
+		nltk \
+		numpy \
+		sklearn \
+		spacy 
+
+# Download spacy pipeline.
+pipeline:
+	. $(PYTHON_VENV)/bin/activate && python -m spacy download en_core_web_sm
+
+# Create virtual environment.
+venv:
+	test -d $(PYTHON_VENV) || python3 -m venv $(PYTHON_VENV)
+
+.PHONY: lib pipeline