diff --git a/okapi.py b/okapi.py
index 3bf491a..5c862ea 100644
--- a/okapi.py
+++ b/okapi.py
@@ -35,7 +35,7 @@ dates = processed_documents['date']
 # Vectorization
 print(f"{len(processed_documents)} documents ready!")
 print("Vectorizing...")
-cv = CountVectorizer()
+cv = CountVectorizer(dtype='uint8')
 transformer = TfidfTransformer()
 
 word_count_vector = cv.fit_transform(tweets)
@@ -44,7 +44,7 @@ try:
 except:
     words = cv.get_feature_names()
 
-tf = pd.DataFrame(word_count_vector.toarray(), columns=words, dtype='int8')
+tf = pd.DataFrame(word_count_vector.toarray(), columns=words)
 transformer.fit_transform(word_count_vector)
 
 tfidf_dict = {}