1 files changed, 2 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 2f7a485..6dad7ac 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,8 @@ setup(
     extra_require=(
         # image reader
         'pillow', 'rawpy',
+        # image extractors
+        'numpy',
         )
 )