diff --git a/php/psalm-baseline.xml b/php/psalm-baseline.xml
index b60d8c6e..fc0c624f 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="5.4.0@62db5d4f6a7ae0a20f7cc5a4952d730272fc0863"/>
+<files psalm-version="5.6.0@e784128902dfe01d489c4123d69918a9f3c1eac5"/>
diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index 989ba593..c0e4587e 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -539,6 +539,7 @@ class DockerActionManager
             apcu_add($cacheKey, $tag);
             /**
              * @psalm-suppress TypeDoesNotContainNull
+             * @psalm-suppress DocblockTypeContradiction
              */
             if ($tag === null) {
                 error_log("No tag was found when getting the current channel. You probably did not follow the documentation correctly. Changing the channel to the default 'latest'.");