diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f4e893f..ff45e8d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,11 +18,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04, ubuntu-20.04]
-        elixir_version: [1.12.3, 1.13.3, 1.14.1]
-        otp_version: [24, 25]
+        elixir_version: [1.13, 1.14, 1.15, 1.16]
+        otp_version: [24, 25, 26]
         exclude:
-          - otp_version: 25
-            elixir_version: 1.12.3
+          - otp_version: 26
+            elixir_version: 1.13
     steps:
       - uses: actions/checkout@v4
 
diff --git a/.tool-versions b/.tool-versions
index b6551eb..8289e1e 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-elixir 1.13.1
+elixir 1.16.0-otp-26
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3b7535..eb2037a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Changed
+
+- Ensure Elixir version is ~> 1.13 https://github.com/ExHammer/hammer/pull/79
+
 ## 6.1.0 - 2022-06-13
 
 ### Changed
diff --git a/mix.exs b/mix.exs
index 1abe29f..af77cc6 100644
--- a/mix.exs
+++ b/mix.exs
@@ -9,7 +9,7 @@ defmodule Hammer.Mixfile do
       app: :hammer,
       description: "A rate-limiter with plugable backends.",
       version: @version,
-      elixir: "~> 1.6",
+      elixir: "~> 1.13",
       build_embedded: Mix.env() == :prod,
       start_permanent: Mix.env() == :prod,
       deps: deps(),