diff --git a/src/Context/InfoContext.php b/src/Context/InfoContext.php
index 1fa25da..82893e7 100644
--- a/src/Context/InfoContext.php
+++ b/src/Context/InfoContext.php
@@ -20,7 +20,7 @@ public function __construct(ResponseInterface $response)
     /**
      * @return mixed
      */
-    public function getInfo(string $type = null)
+    public function getInfo(?string $type = null)
     {
         return $this->response->getInfo($type);
     }
diff --git a/src/Context/InfoContextInterface.php b/src/Context/InfoContextInterface.php
index 4d939cf..24c9054 100644
--- a/src/Context/InfoContextInterface.php
+++ b/src/Context/InfoContextInterface.php
@@ -8,6 +8,6 @@ interface InfoContextInterface
     /**
      * @return mixed
      */
-    public function getInfo(string $type = null);
+    public function getInfo(?string $type = null);
 
 }
diff --git a/src/LoggableHttpClient.php b/src/LoggableHttpClient.php
index c5c5c0a..8e92b69 100644
--- a/src/LoggableHttpClient.php
+++ b/src/LoggableHttpClient.php
@@ -79,7 +79,7 @@ public function request(string $method, string $url, array $options = []): Respo
     /**
      * @param LoggableResponse|iterable<LoggableResponse> $responses
      */
-    public function stream($responses, float $timeout = null): ResponseStreamInterface
+    public function stream($responses, ?float $timeout = null): ResponseStreamInterface
     {
         if ($responses instanceof LoggableResponse) {
             $responses = [$responses];
diff --git a/src/Response/LoggableResponse.php b/src/Response/LoggableResponse.php
index f084ace..6cad98a 100644
--- a/src/Response/LoggableResponse.php
+++ b/src/Response/LoggableResponse.php
@@ -163,7 +163,7 @@ public function cancel(): void
     /**
      * @return mixed
      */
-    public function getInfo(string $type = null)
+    public function getInfo(?string $type = null)
     {
         if (null !== $type) {
             return $this->info[$type] ?? $this->response->getInfo($type);