diff --git a/fotogrid.py b/fotogrid.py
index 9282856..daa8c5d 100644
--- a/fotogrid.py
+++ b/fotogrid.py
@@ -10,7 +10,7 @@ def fotogrid(image_urls):
     if len(image_urls) == 0:
         return ""
 
-    # prepare our 'bins', the columsn of the fotogrid
+    # prepare our 'bins', the columns of the fotogrid
     nbr_of_columns = 4
     prepared_column = []
     for i in range(nbr_of_columns):
diff --git a/requirements.txt b/requirements.txt
index 56de899..98b14d7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ pytest-cov
 requests
 pycodestyle
 codecov
+lxml