diff --git a/.github/actions/elixir-setup/action.yml b/.github/actions/elixir-setup/action.yml
index 7fb48ab..36cf778 100644
--- a/.github/actions/elixir-setup/action.yml
+++ b/.github/actions/elixir-setup/action.yml
@@ -65,8 +65,8 @@ runs:
       uses: erlef/setup-beam@v1
       id: beam
       with:
-        elixir-version: ${{ inputs.elixir-version }}
-        otp-version: ${{ inputs.otp-version }}
+        version-file: .tool-versions
+        version-type: strict
 
     - name: Get deps cache
       uses: actions/cache@v4
diff --git a/.github/workflows/build-and-test.yaml b/.github/workflows/build-and-test.yaml
index 24e888e..d0e0438 100644
--- a/.github/workflows/build-and-test.yaml
+++ b/.github/workflows/build-and-test.yaml
@@ -19,11 +19,6 @@ jobs:
     runs-on: ubuntu-latest
     env:
       MIX_ENV: test
-    strategy:
-      # TODO: It would be better to pull these from the `.tool-versions` file.
-      matrix:
-        otp: ["27.0.1"]
-        elixir: ["1.17.2"]
 
     services:
       db:
@@ -45,8 +40,6 @@ jobs:
       - name: Setup Elixir Project
         uses: ./.github/actions/elixir-setup
         with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
           build-flags: --all-warnings --warnings-as-errors
 
       - name: Run Migrations
diff --git a/.github/workflows/code-quality.yaml b/.github/workflows/code-quality.yaml
index b270dad..9588aca 100644
--- a/.github/workflows/code-quality.yaml
+++ b/.github/workflows/code-quality.yaml
@@ -16,11 +16,6 @@ jobs:
   quality_checks:
     name: Formatting, Credo, and Unused Deps
     runs-on: ubuntu-latest
-    strategy:
-      # TODO: It would be better to pull these from the `.tool-versions` file.
-      matrix:
-        otp: ["27.0.1"]
-        elixir: ["1.17.2"]
 
     steps:
       - name: Checkout repository
@@ -29,8 +24,6 @@ jobs:
       - name: Setup Elixir Project
         uses: ./.github/actions/elixir-setup
         with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
           build-app: false
 
       - name: Check for unused deps
diff --git a/.github/workflows/dialyzer.yaml b/.github/workflows/dialyzer.yaml
index 0524d1e..50869fd 100644
--- a/.github/workflows/dialyzer.yaml
+++ b/.github/workflows/dialyzer.yaml
@@ -18,11 +18,6 @@ jobs:
     runs-on: ubuntu-latest
     env:
       MIX_ENV: dev
-    strategy:
-      # TODO: It would be better to pull these from the `.tool-versions` file.
-      matrix:
-        otp: ["27.0.1"]
-        elixir: ["1.17.2"]
 
     steps:
       - name: Checkout repository
@@ -32,8 +27,6 @@ jobs:
         uses: ./.github/actions/elixir-setup
         id: beam
         with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
           build-app: false
 
       # Don't cache PLTs based on mix.lock hash, as Dialyzer can incrementally update even old ones