>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3169782. --> Reported by: [quicktrick](https://www.drupal.org/user/3635370) >>> <h2>Solution</h2> <p>Composer 1.10.11 has a bug. Use a newer version of Composer.</p> <h2>Original Report</h2> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>I'm trying to update drupal/core 8.9.3 -&gt; 8.9.5. When using the command 'composer update', I get the following errors:</p> <pre>&nbsp; [RuntimeException]<br>&nbsp; Could not load package ezsystems/ezplatform in http://repo.packagist.org: [UnexpectedValueException] Could not parse version constraint dev-load-varnish-only-when-used as ^2.0@dev: Invalid version string "^2.0@dev"<br><br>&nbsp; [UnexpectedValueException]<br>&nbsp; Could not parse version constraint dev-load-varnish-only-when-used as ^2.0@dev: Invalid version string "^2.0@dev"</pre><p>I'm not a developer, sorry for any incorrectness. How can I fix that?</p> > Related issue: [Issue #3169913](https://www.drupal.org/node/3169913)