diff --git a/Dockerfile b/Dockerfile
index deb96f2..dbefc9c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ COPY pyproject.toml /app/
 COPY poetry.lock /app/
 
 WORKDIR /app
-RUN poetry install --no-dev
+RUN poetry install --only main
 COPY . .
 
 RUN mkdir /data && chown nobody /data
diff --git a/pyproject.toml b/pyproject.toml
index 4ec03eb..9a4ca55 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,6 +4,7 @@ version = "1.5.0"
 description = ""
 authors = ["Norbert Szulc <norbert@not7cd.net>"]
 packages = [{ include = "whois" }]
+package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.11"