diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 39ac18f..962aa2b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -46,7 +46,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest]
-        php-version: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
+        php-version: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
     steps:
       - name: Setup PHP
@@ -70,10 +70,6 @@ jobs:
           key: "${{ runner.os }}-php-${{ matrix.php-version }}-${{ hashFiles('**/composer.json') }}"
           restore-keys: "${{ runner.os }}-php-${{ matrix.php-version }}-"
 
-      - name: Drop php-cs-fixer on PHP 7.3
-        if: matrix.php-version == '7.3'
-        run: composer remove --dev friendsofphp/php-cs-fixer --no-update
-
       - name: Install dependencies with Composer
         run: composer update --prefer-dist --no-ansi --no-interaction --no-progress
 
@@ -81,7 +77,6 @@ jobs:
         run: make test-unit
 
       - name: Run php-cs-fixer
-        if: matrix.php-version != '7.3'
         env:
           PHP_CS_FIXER_IGNORE_ENV: 1
         run: make php-cs-fixer
diff --git a/composer.json b/composer.json
index eab2880..cdf8e11 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
   ],
   "license": "MIT",
   "require": {
-    "php": ">=7.3.0",
+    "php": ">=7.4.0",
     "ext-json": "*",
     "ext-openssl": "*",
     "phpseclib/phpseclib": "^3.0"
diff --git a/composer.lock b/composer.lock
index 20151fd..e67e1d4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "cf1c6d33a33f5e8627bd2c76704d44b5",
+    "content-hash": "f1e8b09f3e4b1291ba0e576bc3284f9b",
     "packages": [
         {
             "name": "paragonie/constant_time_encoding",
@@ -3605,7 +3605,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=7.3.0",
+        "php": ">=7.4.0",
         "ext-json": "*",
         "ext-openssl": "*"
     },