diff --git a/Pipfile b/Pipfile
index b39fbcb..822bd07 100644
--- a/Pipfile
+++ b/Pipfile
@@ -6,6 +6,7 @@ name = "pypi"
 [packages]
 pillow = "*"
 sphinx = "*"
+sphinx_rtd_theme = "*"
 
 [dev-packages]