diff --git a/lib/finch/http_error.ex b/lib/finch/http_error.ex
index 6bfe7d9..43df0e3 100644
--- a/lib/finch/http_error.ex
+++ b/lib/finch/http_error.ex
@@ -8,7 +8,7 @@ defmodule Finch.HTTPError do
   @type t() :: %__MODULE__{
           reason: reason(),
           module: module() | nil,
-          source: Mint.HTTPError.t() | nil
+          source: Exception.t() | nil
         }
 
   defexception [:reason, :module, :source]
diff --git a/lib/finch/transport_error.ex b/lib/finch/transport_error.ex
index e404100..2a4f440 100644
--- a/lib/finch/transport_error.ex
+++ b/lib/finch/transport_error.ex
@@ -5,7 +5,7 @@ defmodule Finch.TransportError do
 
   @type reason() :: Mint.TransportError.reason()
 
-  @type t() :: %__MODULE__{reason: reason(), source: Mint.TransportError.t() | nil}
+  @type t() :: %__MODULE__{reason: reason(), source: Exception.t() | nil}
 
   defexception [:reason, :source]