diff --git a/CHANGELOG.md b/CHANGELOG.md
index a680f26..1b4044e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ New features:
 Bugfixes:
 
 Other improvements:
+- Generalizes the parameter type of `deleteBy` (#245 by @acple)
 
 ## [v7.3.0](https://github.com/purescript/purescript-arrays/releases/tag/v7.3.0) - 2023-11-03
 
diff --git a/src/Data/Array.purs b/src/Data/Array.purs
index 431f942..608689d 100644
--- a/src/Data/Array.purs
+++ b/src/Data/Array.purs
@@ -1190,7 +1190,7 @@ delete = deleteBy eq
 -- | deleteBy mod3eq 6 [1, 3, 4, 3] = [1, 4, 3]
 -- | ```
 -- |
-deleteBy :: forall a. (a -> a -> Boolean) -> a -> Array a -> Array a
+deleteBy :: forall a b. (b -> a -> Boolean) -> b -> Array a -> Array a
 deleteBy _ _ [] = []
 deleteBy eq x ys = maybe ys (\i -> unsafePartial $ fromJust (deleteAt i ys)) (findIndex (eq x) ys)