diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54a9d391..9c26471a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,10 @@ For a full diff see [`0.9.0...1.0.0`](https://github.com/localheinz/composer-nor
 
 * Added this changelog ([#94](https://github.com/localheinz/composer-normalize/pull/94)), by [@localheinz](https://github.com/localheinz)
 
+#### Fixed
+
+* Force reading `composer.json` and `composer.lock` after normalization to ensure `composer.lock` is updated when not fresh after normalization ([#139](https://github.com/localheinz/composer-normalize/pull/139)), by [@localheinz](https://github.com/localheinz)
+
 #### Removed
 
 * Removed normalizers after extracting package [`localheinz/composer-json-normalizer`](https://github.com/localheinz/composer-json-normalizer) ([#106](https://github.com/localheinz/composer-normalize/pull/106)), by [@localheinz](https://github.com/localheinz)
diff --git a/src/Command/NormalizeCommand.php b/src/Command/NormalizeCommand.php
index 0eb55aa6..69ea6e7e 100644
--- a/src/Command/NormalizeCommand.php
+++ b/src/Command/NormalizeCommand.php
@@ -238,6 +238,17 @@ protected function execute(Console\Input\InputInterface $input, Console\Output\O
         if (false === $noUpdateLock && true === $locker->isLocked()) {
             $io->write('<info>Updating lock file.</info>');
 
+            $this->resetComposer();
+
+            $file = $input->getArgument('file');
+
+            if (\is_string($file)) {
+                return $this->updateLockerInWorkingDirectory(
+                    $output,
+                    \dirname($file)
+                );
+            }
+
             return $this->updateLocker($output);
         }
 
@@ -380,4 +391,30 @@ private function updateLocker(Console\Output\OutputInterface $output): int
             $output
         );
     }
+
+    /**
+     * @see https://getcomposer.org/doc/03-cli.md#update
+     *
+     * @param Console\Output\OutputInterface $output
+     * @param string                         $workingDirectory
+     *
+     * @throws \Exception
+     *
+     * @return int
+     */
+    private function updateLockerInWorkingDirectory(Console\Output\OutputInterface $output, string $workingDirectory): int
+    {
+        return $this->getApplication()->run(
+            new Console\Input\ArrayInput([
+                'command' => 'update',
+                '--lock' => true,
+                '--no-autoloader' => true,
+                '--no-plugins' => true,
+                '--no-scripts' => true,
+                '--no-suggest' => true,
+                '--working-dir' => $workingDirectory,
+            ]),
+            $output
+        );
+    }
 }
diff --git a/test/Integration/NormalizeTest.php b/test/Integration/NormalizeTest.php
index 66eb1e70..a0d7798f 100644
--- a/test/Integration/NormalizeTest.php
+++ b/test/Integration/NormalizeTest.php
@@ -709,6 +709,56 @@ public function testSucceedsWhenComposerJsonIsPresentAndValidAndComposerLockIsPr
         self::assertComposerLockFileNotModified($initialState, $currentState);
     }
 
+    /**
+     * @dataProvider providerCommandInvocation
+     *
+     * @param CommandInvocation $commandInvocation
+     */
+    public function testSucceedsWhenComposerJsonIsPresentAndValidAndComposerLockIsPresentAndFreshBeforeAndComposerJsonIsNotYetNormalizedAndComposerLockIsNotFreshAfter(CommandInvocation $commandInvocation): void
+    {
+        $scenario = $this->createScenario(
+            $commandInvocation,
+            __DIR__ . '/../Fixture/json/valid/lock/present/lock/fresh-before/json/not-yet-normalized/lock/not-fresh-after'
+        );
+
+        $initialState = $scenario->initialState();
+
+        self::assertComposerJsonFileExists($initialState);
+        self::assertComposerLockFileExists($initialState);
+        self::assertComposerLockFileFresh($initialState);
+
+        $application = $this->createApplication(new NormalizeCommand(
+            new Factory(),
+            new ComposerJsonNormalizer(),
+            new Formatter(),
+            new Differ()
+        ));
+
+        $input = new Console\Input\ArrayInput($scenario->consoleParameters());
+
+        $output = new Console\Output\BufferedOutput();
+
+        $exitCode = $application->run(
+            $input,
+            $output
+        );
+
+        self::assertExitCodeSame(0, $exitCode);
+
+        $expected = \sprintf(
+            'Successfully normalized %s.',
+            $scenario->composerJsonFileReference()
+        );
+
+        self::assertContains($expected, $output->fetch());
+
+        $currentState = $scenario->currentState();
+
+        self::assertComposerJsonFileModified($initialState, $currentState);
+        self::assertComposerLockFileModified($initialState, $currentState);
+        self::assertComposerLockFileFresh($currentState);
+    }
+
     /**
      * @dataProvider providerCommandInvocation
      *
@@ -989,6 +1039,17 @@ private static function assertComposerLockFileNotFresh(State $state): void
         ));
     }
 
+    private static function assertComposerLockFileModified(State $expected, State $actual): void
+    {
+        self::assertComposerLockFileExists($actual);
+
+        self::assertJsonStringNotEqualsJsonString(
+            $expected->composerLockFile()->contents(),
+            $actual->composerLockFile()->contents(),
+            'Failed asserting that initial composer.lock has been modified.'
+        );
+    }
+
     private static function assertComposerLockFileNotModified(State $expected, State $actual): void
     {
         self::assertComposerLockFileExists($actual);