diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index e8ba6a0..293bb8e 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -34,7 +34,7 @@ jobs:
         run: echo "COMPOSER_CACHE_DIR=$(composer config cache-dir)" >> $GITHUB_ENV
 
       - name: Cache dependencies installed with composer
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ env.COMPOSER_CACHE_DIR }}
           key: php${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}
diff --git a/.github/workflows/curl-tester.yml b/.github/workflows/curl-tester.yml
new file mode 100644
index 0000000..7b4232b
--- /dev/null
+++ b/.github/workflows/curl-tester.yml
@@ -0,0 +1,21 @@
+name: Run curl tester
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 4.0
+
+jobs:
+  run-bash:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Make curl tester executable
+        run: chmod +x ./test/tester.sh
+
+      - name: Run curl tester
+        run: ./test/tester.sh
diff --git a/test/curl-tester.sh b/test/curl-tester.sh
new file mode 100755
index 0000000..40b2246
--- /dev/null
+++ b/test/curl-tester.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Bootstrap
+
+OK='✅'
+KO='❌'
+
+if ! command -v curl > /dev/null 2>&1; then
+    echo "$KO curl is not installed"
+    exit 1
+fi
+
+# Define globals
+
+body=""
+status_code=0
+
+# Functions
+
+send_request() {
+  response=$(curl -s -w "\n%{http_code}" $1)
+
+  body=$(echo "$response" | sed '$d')
+  status_code=$(echo "$response" | tail -n 1)
+}
+
+get() {
+  send_request $1
+}
+
+post() {
+  send_request $1
+}
+
+# Endpoints
+
+endpoint_home="https://api.dotkernel.net"
+
+# Tests
+
+get $endpoint_home
+
+if echo "$body" | grep -q '{"message":"Welcome to DotKernel API!" }'; then
+  echo "$OK $endpoint_home: SUCCESS ($status_code)"
+else
+  echo "$KO $endpoint_home: FAILED ($status_code)"
+  exit 1
+fi