diff --git a/prek.toml b/prek.toml
index 269a643a7..49e0883af 100644
--- a/prek.toml
+++ b/prek.toml
@@ -166,7 +166,7 @@ hooks = [
     id = "mypy",
     name = "mypy",
     stages = ["pre-push"],
-    entry = "uv run --group=dev -m mypy --num-workers=4",
+    entry = "uv run --group=dev -m mypy",
     language = "python",
     types_or = [
       "python",
@@ -179,7 +179,7 @@ hooks = [
     id = "mypy-docs",
     name = "mypy-docs",
     stages = ["pre-push"],
-    entry = 'uv run --group=dev doccmd --no-write-to-file --language=python --command="mypy --num-workers=4"',
+    entry = 'uv run --group=dev doccmd --no-write-to-file --language=python --command="mypy"',
     language = "python",
     types_or = [
       "markdown",
diff --git a/pyproject.toml b/pyproject.toml
index da9c76eef..0ecdf7ed1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -405,6 +405,7 @@ strict = true
 plugins = [
     "mypy_strict_kwargs",
 ]
+num_workers = "auto"
 
 [tool.pyrefly]
 errors.non-exhaustive-match = "error"