diff --git a/.travis.yml b/.travis.yml
index be44ea7..615cb34 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,23 +1,23 @@
 language: php
 
-php:
-  - 7.0
-  - 7.1
+jobs:
+  include:
+    - php: 7.0
+      env: BROADWAY=^1.0
+    - php: 7.3
+      env: BROADWAY=^2.1
 
 before_script:
   - composer selfupdate
-  - composer update --prefer-dist
+  - composer require broadway/broadway $BROADWAY --prefer-dist
 
 script:
   - vendor/bin/phpunit
   - vendor/bin/phpbench run --report=default
 
-
 after_script:
   - vendor/bin/coveralls
 
-sudo: false
-
 cache:
   directories:
     - $HOME/.composer/cache
diff --git a/composer.json b/composer.json
index fcc4848..a9592fa 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "require": {
         "php": "^7.0",
         "doctrine/instantiator": "^1.0",
-        "broadway/broadway": "^1.0"
+        "broadway/broadway": "^1.0|^2.1"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/SymfonyIntegration/Resources/config/services.yml b/src/SymfonyIntegration/Resources/config/services.yml
index a901242..1d5b27f 100644
--- a/src/SymfonyIntegration/Resources/config/services.yml
+++ b/src/SymfonyIntegration/Resources/config/services.yml
@@ -9,6 +9,7 @@ services:
 
     broadway_serialization.reconstitute:
         class: BroadwaySerialization\Reconstitution\ReconstituteUsingInstantiatorAndHydrator
+        public: true
         arguments:
             - "@broadway_serialization.instantiator"
             - "@broadway_serialization.hydrate"
diff --git a/test/Performance/SomeOtherSerializableClass.php b/test/Performance/SomeOtherSerializableClass.php
index dfa3e3f..2637f0d 100644
--- a/test/Performance/SomeOtherSerializableClass.php
+++ b/test/Performance/SomeOtherSerializableClass.php
@@ -14,7 +14,7 @@ public static function deserialize(array $data)
         return new self($data['foo']);
     }
 
-    public function serialize()
+    public function serialize(): array
     {
         return [
             'foo' => $this->foo
diff --git a/test/Performance/TraditionalSerializableClass.php b/test/Performance/TraditionalSerializableClass.php
index d483c6f..fa10608 100644
--- a/test/Performance/TraditionalSerializableClass.php
+++ b/test/Performance/TraditionalSerializableClass.php
@@ -42,7 +42,7 @@ function ($data) {
         return $object;
     }
 
-    public function serialize()
+    public function serialize(): array
     {
         return [
             'stringProperty' => $this->stringProperty,
diff --git a/test/Serialization/Fixtures/TraditionalSerializableObject.php b/test/Serialization/Fixtures/TraditionalSerializableObject.php
index 8629d17..27d2714 100644
--- a/test/Serialization/Fixtures/TraditionalSerializableObject.php
+++ b/test/Serialization/Fixtures/TraditionalSerializableObject.php
@@ -24,7 +24,7 @@ public static function deserialize(array $data)
         return new self($data['bar']);
     }
 
-    public function serialize()
+    public function serialize(): array
     {
         return ['bar' => $this->bar];
     }