diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bd07065a..e8d5e494 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,19 +16,11 @@ jobs:
       fail-fast: false
       matrix:
         elixir:
+          - '1.20'
           - '1.19'
           - '1.18'
           - '1.17'
           - '1.16'
-          - '1.15'
-          - '1.14'
-          - '1.13'
-          - '1.12'
-          - '1.11'
-          - '1.10'
-          - '1.9'
-          - '1.8'
-          - '1.7'
 
     steps:
       - uses: actions/checkout@v4
@@ -48,7 +40,7 @@ jobs:
     name: Benchmark
     runs-on: ubuntu-latest
     container:
-      image: elixir:1.19
+      image: elixir:1.20
     steps:
       - uses: actions/checkout@v4
 
@@ -66,7 +58,7 @@ jobs:
     name: Coverage
     runs-on: ubuntu-latest
     container:
-      image: elixir:1.19
+      image: elixir:1.20
     env:
       MIX_ENV: cover
     steps:
@@ -88,7 +80,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     container:
-      image: elixir:1.19
+      image: elixir:1.20
     steps:
       - uses: actions/checkout@v4
 
@@ -112,7 +104,7 @@ jobs:
     name: Linting
     runs-on: ubuntu-latest
     container:
-      image: elixir:1.19
+      image: elixir:1.20
     steps:
       - uses: actions/checkout@v4
 
diff --git a/lib/cachex.ex b/lib/cachex.ex
index 60b6e9a9..32e18ef2 100644
--- a/lib/cachex.ex
+++ b/lib/cachex.ex
@@ -49,7 +49,6 @@ defmodule Cachex do
 
   # import util macros
   require Router
-  require Overseer
 
   # avoid inspect clashes
   import Kernel, except: [inspect: 2]
diff --git a/lib/cachex/spec/validator.ex b/lib/cachex/spec/validator.ex
index da76368a..08f82b03 100644
--- a/lib/cachex/spec/validator.ex
+++ b/lib/cachex/spec/validator.ex
@@ -10,7 +10,7 @@ defmodule Cachex.Spec.Validator do
   import Cachex.Spec
 
   # internal spec to refer to each record type
-  @type record ::
+  @type spec_record ::
           Cachex.Spec.command()
           | Cachex.Spec.entry()
           | Cachex.Spec.expiration()
@@ -31,7 +31,7 @@ defmodule Cachex.Spec.Validator do
 
   This will delegate each record type to a customized validation function.
   """
-  @spec valid?(atom, record) :: boolean
+  @spec valid?(atom, spec_record) :: boolean
 
   # Validates a command specification record.
   #
diff --git a/mix.exs b/mix.exs
index 92a128df..0ffda9a4 100644
--- a/mix.exs
+++ b/mix.exs
@@ -24,7 +24,7 @@ defmodule Cachex.Mixfile do
         maintainers: ["Isaac Whitfield"]
       },
       version: @version,
-      elixir: "~> 1.7",
+      elixir: "~> 1.16",
       deps: deps(),
       docs: [
         main: "overview",
@@ -61,7 +61,16 @@ defmodule Cachex.Mixfile do
       test_coverage: [
         tool: ExCoveralls
       ],
-      preferred_cli_env: [
+      aliases: [
+        bench: "run benchmarks/main.exs",
+        test: [&start_epmd/1, "test"]
+      ]
+    ]
+  end
+
+  def cli do
+    [
+      preferred_envs: [
         docs: :docs,
         bench: :bench,
         credo: :lint,
@@ -69,10 +78,6 @@ defmodule Cachex.Mixfile do
         coveralls: :cover,
         "coveralls.html": :cover,
         "coveralls.travis": :cover
-      ],
-      aliases: [
-        bench: "run benchmarks/main.exs",
-        test: [&start_epmd/1, "test"]
       ]
     ]
   end