diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 5e80be9..8070853 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -9,7 +9,7 @@
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
 	// Use 'postCreateCommand' to run commands after the container is created.
-	"postCreateCommand": "pip install --user uv && uv sync --dev"
+	"postCreateCommand": "pip install --user uv && uv sync --frozen --dev"
 	// Configure tool-specific properties.
 	// "customizations": {},
 	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.