diff --git a/photo_stitcher/requirements.txt b/photo_stitcher/requirements.txt
new file mode 100644
index 0000000..d8acd03
--- /dev/null
+++ b/photo_stitcher/requirements.txt
@@ -0,0 +1,2 @@
+pillow>=9.0,<11.0
+pytest>=7.0,<8.0