diff --git a/pyproject.toml b/pyproject.toml
index 2658217b..307d89cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ dependencies = [
     "numpy",
     "pydantic",
     "pvi",
+    "softioc",
 ] # Add project dependencies here, e.g. ["click", "numpy"]
 dynamic = ["version"]
 license.file = "LICENSE"
diff --git a/src/fastcs/cs_methods.py b/src/fastcs/cs_methods.py
index 25c32c13..15c4056b 100644
--- a/src/fastcs/cs_methods.py
+++ b/src/fastcs/cs_methods.py
@@ -23,7 +23,6 @@ def __init__(self, method_type: MethodType, fn: Callable, **kwargs) -> None:
         self.kwargs = kwargs
 
     def _validate_method(self, type: MethodType, fn: Callable) -> None:
-
         if self.return_type not in (None, Signature.empty):
             raise FastCSException("Method return type must be None or empty")