diff --git a/index.d.ts b/index.d.ts
index ad5a22a..e24fb4e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -2,12 +2,17 @@
 // Project: render-propper
 // Definitions by: Seth MacPherson <https://github.com/smacpherson64>
 
-declare function renderProp(propCallback: Function): (componentLogic: Function) => Function;
-declare function renderProp(propCallback: Function, componentLogic: Function): Function;
+declare function renderProp<Input, Results, Output>(
+  renderer: (input: Input) => (results: Results) => Output
+): (logic: (input: Input) => Results) => (input: Input) => Output;
 
-declare function childrenRenderProp(componentLogic: Function): Function;
+declare function renderProp<Input, Results, Output>(
+  renderer: (input: Input) => (results: Results) => Output,
+  logic: (input: Input) => Results
+): (input: Input) => Output;
 
-export {
-  renderProp,
-  childrenRenderProp
-}
\ No newline at end of file
+declare function childrenRenderProp<Input, Results, Output>(
+  logic: (input: Input) => Results
+): (input: Input) => Output;
+
+export { renderProp, childrenRenderProp };