diff --git a/composer.json b/composer.json
index 9838d3974..1d818f377 100644
--- a/composer.json
+++ b/composer.json
@@ -98,8 +98,8 @@
         "nyholm/psr7": "^1.4",
         "open-telemetry/dev-tools": "dev-main",
         "php-http/mock-client": "^1.5",
-        "phpdocumentor/reflection-docblock": "^6.0",
-        "phpspec/prophecy": "1.26.*",
+        "phpdocumentor/reflection-docblock": "^5.3",
+        "phpspec/prophecy": "1.22.*",
         "phpspec/prophecy-phpunit": "^2",
         "phpstan/phpstan": "^1.10.13",
         "phpstan/phpstan-mockery": "^1.1",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 1265c4d71..1a20855da 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -57,6 +57,10 @@ parameters:
             message: "#.*expects Google\\\\Protobuf\\\\RepeatedField.*#"
             paths:
                 - src/Contrib/Otlp
+        -
+            message: "#Call to an undefined method Google\\\\Protobuf\\\\FieldDescriptor::getLabel\\(\\).#"
+            paths:
+                - src/Contrib/Otlp/ProtobufSerializer.php
         -
             message: "#^Call to (static )?method .* on an unknown class .*#"
             paths:
diff --git a/psalm.xml.dist b/psalm.xml.dist
index 0f70e6e0a..cabed693f 100644
--- a/psalm.xml.dist
+++ b/psalm.xml.dist
@@ -35,6 +35,11 @@
                 <referencedMethod name="Google\Protobuf\Internal\RepeatedField::offsetSet"/>
             </errorLevel>
         </UndefinedMethod>
+        <UndefinedDocblockClass>
+            <errorLevel type="suppress">
+                <referencedClass name="Google\Protobuf\Internal\RepeatedField"/>
+            </errorLevel>
+        </UndefinedDocblockClass>
         <ArgumentTypeCoercion>
             <errorLevel type="suppress">
                 <directory name="./examples"/>