diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dc24bea..6b1b016 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,13 +7,9 @@ jobs:
     strategy:
       matrix:
         include:
-          - elixir: 1.14.x
-            otp: 25.x
+          - elixir: 1.16.x
+            otp: 26.x
             check_formatted: true
-          - elixir: 1.13.x
-            otp: 24.x
-          - elixir: 1.12.x
-            otp: 24.x
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.tool-versions b/.tool-versions
index 73654c1..53ee0b1 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-elixir 1.14.0-otp-25
-erlang 25.0.4
+elixir 1.16.1-otp-26
+erlang 26.2.1
diff --git a/lib/multipart/part.ex b/lib/multipart/part.ex
index 75a3aad..43859fd 100644
--- a/lib/multipart/part.ex
+++ b/lib/multipart/part.ex
@@ -35,7 +35,7 @@ defmodule Multipart.Part do
   @spec file_body(String.t(), headers()) :: t()
   def file_body(path, headers \\ []) do
     %File.Stat{size: size} = File.stat!(path)
-    file_stream = File.stream!(path, [{:read_ahead, 4096}], 1024)
+    file_stream = File.stream!(path, 1024, [{:read_ahead, 4096}])
 
     %__MODULE__{body: file_stream, content_length: size, headers: headers}
   end
diff --git a/mix.exs b/mix.exs
index 2e411a3..9a5866c 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule Multipart.MixProject do
     [
       app: :multipart,
       version: @version,
-      elixir: "~> 1.12",
+      elixir: "~> 1.16",
       name: "Multipart",
       source_url: "https://github.com/breakroom/multipart",
       description: "Multipart message generator",