diff --git a/psalm.xml b/psalm.xml
index d923057e..866e06ba 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<psalm xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://getpsalm.org/schema/config" errorLevel="3" findUnusedPsalmSuppress="true" findUnusedBaselineEntry="true" findUnusedCode="false" resolveFromConfigFile="true" xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd">
+<psalm xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://getpsalm.org/schema/config" errorLevel="2" findUnusedPsalmSuppress="true" findUnusedBaselineEntry="true" findUnusedCode="false" resolveFromConfigFile="true" xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd">
     <projectFiles>
         <directory name="src"/>
         <directory name="tests"/>
@@ -7,6 +7,16 @@
             <directory name="vendor"/>
         </ignoreFiles>
     </projectFiles>
+    <issueHandlers>
+        <!-- Psalm equivalent of PHPStan config `treatPhpDocTypesAsCertain: false` -->
+        <DocblockTypeContradiction errorLevel="suppress"/>
+        <RedundantConditionGivenDocblockType errorLevel="suppress"/>
+        <DeprecatedClass>
+            <errorLevel type="suppress">
+                <referencedClass name="Sonata\Form\Type\EqualType"/>
+            </errorLevel>
+        </DeprecatedClass>
+    </issueHandlers>
     <plugins>
         <pluginClass class="Psalm\SymfonyPsalmPlugin\Plugin"/>
         <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
diff --git a/src/Bridge/Symfony/DependencyInjection/SonataFormExtension.php b/src/Bridge/Symfony/DependencyInjection/SonataFormExtension.php
index 465f45f7..89e6cd31 100644
--- a/src/Bridge/Symfony/DependencyInjection/SonataFormExtension.php
+++ b/src/Bridge/Symfony/DependencyInjection/SonataFormExtension.php
@@ -62,6 +62,8 @@ public function load(array $configs, ContainerBuilder $container): void
     /**
      * NEXT_MAJOR: Remove this method.
      *
+     * @psalm-suppress DeprecatedClass
+     *
      * @param mixed[] $config
      */
     private function configureSerializerFormats(array $config): void
diff --git a/src/EventListener/ResizeFormListener.php b/src/EventListener/ResizeFormListener.php
index 3b5fa37f..21f6f66f 100644
--- a/src/EventListener/ResizeFormListener.php
+++ b/src/EventListener/ResizeFormListener.php
@@ -68,9 +68,12 @@ public function preSetData(FormEvent $event): void
         }
 
         // First remove all rows except for the prototype row
-        // Type cast to string, because Symfony form can returns integer keys
+        // Type cast to string, because Symfony form can return integer keys
+        /**
+         * @psalm-suppress RedundantCastGivenDocblockType -- Remove this and the casting when dropping support of < Symfony 6.2
+         */
         foreach ($form as $name => $child) {
-            // @phpstan-ignore-next-line
+            // @phpstan-ignore-next-line -- Remove this and the casting when dropping support of < Symfony 6.2
             $form->remove((string) $name);
         }
 
@@ -108,9 +111,12 @@ public function preSubmit(FormEvent $event): void
         }
 
         // Remove all empty rows except for the prototype row
-        // Type cast to string, because Symfony form can returns integer keys
+        // Type cast to string, because Symfony form can return integer keys
+        /**
+         * @psalm-suppress RedundantCastGivenDocblockType -- Remove this and the casting when dropping support of < Symfony 6.2
+         */
         foreach ($form as $name => $child) {
-            // @phpstan-ignore-next-line
+            // @phpstan-ignore-next-line -- Remove this and the casting when dropping support of < Symfony 6.2
             $form->remove((string) $name);
         }
 
@@ -140,6 +146,8 @@ public function preSubmit(FormEvent $event): void
     }
 
     /**
+     * @psalm-suppress PossibleRawObjectIteration -- https://github.com/vimeo/psalm/issues/9489
+     *
      * @throws UnexpectedTypeException
      */
     public function onSubmit(FormEvent $event): void
diff --git a/src/Serializer/BaseSerializerHandler.php b/src/Serializer/BaseSerializerHandler.php
index 99d33fcf..56bdd34f 100644
--- a/src/Serializer/BaseSerializerHandler.php
+++ b/src/Serializer/BaseSerializerHandler.php
@@ -23,6 +23,8 @@
 /**
  * NEXT_MAJOR: Remove this class.
  *
+ * @psalm-suppress DeprecatedInterface
+ *
  * @deprecated since sonata-project/form-extensions version 1.13 and will be removed in 2.0.
  *
  * @author Sylvain Deloux <sylvain.deloux@ekino.com>
diff --git a/src/Type/BasePickerType.php b/src/Type/BasePickerType.php
index 804fbe19..9b0b523a 100644
--- a/src/Type/BasePickerType.php
+++ b/src/Type/BasePickerType.php
@@ -80,10 +80,7 @@ public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setNormalizer(
             'format',
-            /**
-             * @param int|string $format
-             */
-            function (Options $options, $format): string {
+            function (Options $options, int|string $format): string {
                 if (isset($options['date_format']) && \is_string($options['date_format'])) {
                     return $options['date_format'];
                 }
diff --git a/src/Validator/Constraints/InlineConstraint.php b/src/Validator/Constraints/InlineConstraint.php
index 79ee9a8f..ca66ef74 100755
--- a/src/Validator/Constraints/InlineConstraint.php
+++ b/src/Validator/Constraints/InlineConstraint.php
@@ -108,10 +108,7 @@ public function getRequiredOptions(): array
         ];
     }
 
-    /**
-     * @return string|callable
-     */
-    public function getMethod()
+    public function getMethod(): string|callable
     {
         return $this->method;
     }
diff --git a/src/Validator/ErrorElement.php b/src/Validator/ErrorElement.php
index 8ffe3473..969e8eba 100755
--- a/src/Validator/ErrorElement.php
+++ b/src/Validator/ErrorElement.php
@@ -179,6 +179,8 @@ public function getSubject()
     }
 
     /**
+     * @psalm-suppress RedundantCastGivenDocblockType
+     *
      * @param string|array{0?:string, 1?:array<string, mixed>, 2?:mixed} $message
      * @param array<string, mixed>                                       $parameters
      */
@@ -247,6 +249,8 @@ private function getValue()
     }
 
     /**
+     * @psalm-suppress UnsafeInstantiation -- it is supposed that Constraint constructor is not going to change
+     *
      * @param array<string, mixed> $options
      *
      * @throws \RuntimeException