diff --git a/setup.cfg b/setup.cfg
index 6da48d784..7e8cd5668 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -102,7 +102,7 @@ dev =
     flake8>=6.0.0
     flake8-bugbear>=23.2.13
     isort>=5.10.1
-    pyright==1.1.365 # must be larger than 1.1.366; https://github.com/microsoft/pyright/issues/8087
+    pyright>=1.1.367
     pre-commit>=2.15.0
     wheel
     matplotlib
diff --git a/shiny/render/transformer/_transformer.py b/shiny/render/transformer/_transformer.py
index 635286ef7..0f7860f68 100644
--- a/shiny/render/transformer/_transformer.py
+++ b/shiny/render/transformer/_transformer.py
@@ -120,17 +120,6 @@ def __init__(self, *args: P.args, **kwargs: P.kwargs) -> None:
         self.kwargs = kwargs
 
 
-def empty_params() -> TransformerParams[P]:
-    """
-    Return `TransformerParams` definition with no parameters.
-    """
-
-    def inner(*args: P.args, **kwargs: P.kwargs) -> TransformerParams[P]:
-        return TransformerParams[P](*args, **kwargs)
-
-    return inner()
-
-
 # ======================================================================================
 # Renderer / RendererSync / RendererAsync base class
 # ======================================================================================
@@ -544,7 +533,9 @@ def __call__(
         params: TransformerParams[P] | None = None,
     ) -> OutputRenderer[OT] | OutputRendererDecorator[IT, OT]:
         if params is None:
-            params = self.params()
+            params = (
+                self.params()
+            )  # pyright: ignore[reportCallIssue] ; Missing param spec args; False positive error as we know there should be no args.
         if not isinstance(params, TransformerParams):
             raise TypeError(
                 "Expected `params` to be of type `TransformerParams` but received "
@@ -560,7 +551,10 @@ def __init__(
         self._fn = fn
         self.ValueFn = ValueFn[IT]
         self.OutputRenderer = OutputRenderer[OT]
-        self.OutputRendererDecorator = OutputRendererDecorator[IT, OT]
+
+        self.OutputRendererDecorator = OutputRendererDecorator[
+            IT, OT
+        ]  # pyright: ignore[reportAttributeAccessIssue] ; False positive error as the types should match the class definition. Not worrying about it as this code is deprecated.
 
 
 @overload