diff --git a/pypi_query_mcp/tools/compatibility_check.py b/pypi_query_mcp/tools/compatibility_check.py
index 48f4224..20896c7 100644
--- a/pypi_query_mcp/tools/compatibility_check.py
+++ b/pypi_query_mcp/tools/compatibility_check.py
@@ -3,12 +3,7 @@
 import logging
 from typing import Any
 
-from ..core import (
-    InvalidPackageNameError,
-    NetworkError,
-    PyPIClient,
-    PyPIError,
-)
+from ..core import InvalidPackageNameError, NetworkError, PyPIClient, PyPIError
 from ..core.version_utils import VersionCompatibility
 
 logger = logging.getLogger(__name__)
diff --git a/pypi_query_mcp/tools/package_query.py b/pypi_query_mcp/tools/package_query.py
index 5cfee49..cf36a0f 100644
--- a/pypi_query_mcp/tools/package_query.py
+++ b/pypi_query_mcp/tools/package_query.py
@@ -3,12 +3,7 @@
 import logging
 from typing import Any
 
-from ..core import (
-    InvalidPackageNameError,
-    NetworkError,
-    PyPIClient,
-    PyPIError,
-)
+from ..core import InvalidPackageNameError, NetworkError, PyPIClient, PyPIError
 
 logger = logging.getLogger(__name__)
 
diff --git a/pyproject.toml b/pyproject.toml
index 4f53c22..c12a568 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,6 +72,12 @@ ignore = [
 [tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["F401"]
 
+[tool.isort]
+profile = "black"
+multi_line_output = 3
+line_length = 88
+known_first_party = ["pypi_query_mcp"]
+
 [tool.mypy]
 python_version = "3.10"
 check_untyped_defs = true