diff --git a/viewer_app.py b/edda/viewer_app.py
similarity index 100%
rename from viewer_app.py
rename to edda/viewer_app.py
diff --git a/pyproject.toml b/pyproject.toml
index 943997b..f4ae723 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -84,7 +84,7 @@ llamaindex = [
 ]
 
 [project.scripts]
-edda-viewer = "viewer_app:main"
+edda-viewer = "edda.viewer_app:main"
 
 [project.urls]
 Homepage = "https://github.com/i2y/edda"