diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 9fd42ad4..56112a19 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -83,7 +83,6 @@ dev = [
     "black>=23.0",
     "isort>=5.0",
     "ruff>=0.1.0",
-    "mypy>=1.0",
 ]
 
 [tool.hatch.build.targets.wheel]
@@ -100,7 +99,7 @@ line-length = 100
 target-version = "py312"
 
 [tool.ruff.lint]
-select = ["E", "F", "I", "N", "W", "B", "C", "D"]
+select = ["E", "F", "I", "N", "W", "B", "C", "D", "PYI"]
 ignore = [
     "D100",  # Missing docstring in public module
     "D101",  # Missing docstring in public class