diff --git a/.github/workflows/securitycheck.yml b/.github/workflows/securitycheck.yml
index c6184bd9..ad225bb9 100644
--- a/.github/workflows/securitycheck.yml
+++ b/.github/workflows/securitycheck.yml
@@ -32,6 +32,9 @@ jobs:
           php-version: ${{ matrix.php }}
           coverage: none
 
+      - name: Enable creation of `composer.lock` file
+        run: composer config --unset lock
+
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
diff --git a/composer.json b/composer.json
index 70b38a17..7f644b12 100644
--- a/composer.json
+++ b/composer.json
@@ -51,6 +51,9 @@
       "PHPCSStandards\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Tests\\": "tests/"
     }
   },
+  "config": {
+    "lock": false
+  },
   "extra": {
     "class": "PHPCSStandards\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Plugin"
   },