diff --git a/php/psalm-baseline.xml b/php/psalm-baseline.xml
index 51b41ef5..e468cf06 100644
--- a/php/psalm-baseline.xml
+++ b/php/psalm-baseline.xml
@@ -1,2 +1,2 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="5.13.1@086b94371304750d1c673315321a55d15fc59015"/>
+<files psalm-version="5.14.1@b9d355e0829c397b9b3b47d0c0ed042a8a70284d"/>
diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index 45727a37..eb437e52 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -896,7 +896,7 @@ class DockerActionManager
                 return null;
             }
 
-            return str_replace('T', ' ', $imageOutput['Created']);
+            return str_replace('T', ' ', (string)$imageOutput['Created']);
         } catch (\Exception $e) {
             return null;
         }