diff --git a/src/MessageTrait.php b/src/MessageTrait.php
index d1c568f..decec2b 100644
--- a/src/MessageTrait.php
+++ b/src/MessageTrait.php
@@ -36,7 +36,7 @@ trait MessageTrait
      *
      * @var string[]
      */
-    private static array $supportedProtocolVersions = ['1.0', '1.1', '2.0', '2'];
+    private static array $supportedProtocolVersions = ['1.0', '1.1', '2.0', '2', '3.0', '3'];
 
     /**
      * Map of all registered original headers, as `original header name` => `array of values`.
diff --git a/src/RequestTrait.php b/src/RequestTrait.php
index 247920d..bd34459 100644
--- a/src/RequestTrait.php
+++ b/src/RequestTrait.php
@@ -131,7 +131,7 @@ public function getMethod(): string
      * @param string $method Case-sensitive method.
      * @return static
      * @throws InvalidArgumentException for invalid HTTP methods.
-     * @psalm-suppress DocblockTypeContradiction
+     * @psalm-suppress DocblockTypeContradiction, TypeDoesNotContainType, NoValue, RedundantCondition
      */
     public function withMethod($method): RequestInterface
     {
@@ -241,7 +241,7 @@ private function init(
     /**
      * @param UriInterface|string $uri
      * @throws InvalidArgumentException for invalid URI.
-     * @psalm-suppress RedundantConditionGivenDocblockType
+     * @psalm-suppress TypeDoesNotContainType, NoValue, RedundantCondition
      */
     private function setUri($uri): void
     {
@@ -265,6 +265,7 @@ private function setUri($uri): void
      * Updates `Host` header from the current URI and sets the `Host` first in the list of headers.
      *
      * @see https://tools.ietf.org/html/rfc7230#section-5.4
+     * @psalm-suppress RiskyTruthyFalsyComparison
      */
     private function updateHostHeaderFromUri(): void
     {
diff --git a/src/ResponseTrait.php b/src/ResponseTrait.php
index 6aaaf05..a8556c4 100644
--- a/src/ResponseTrait.php
+++ b/src/ResponseTrait.php
@@ -147,6 +147,7 @@ public function getStatusCode(): int
      * @psalm-suppress DocblockTypeContradiction
      * @psalm-suppress TypeDoesNotContainType
      * @psalm-suppress RedundantCondition
+     * @psalm-suppress InvalidCast
      * @psalm-suppress NoValue
      */
     public function withStatus($code, $reasonPhrase = ''): ResponseInterface
diff --git a/src/StreamTrait.php b/src/StreamTrait.php
index 146c724..0dfb0e0 100644
--- a/src/StreamTrait.php
+++ b/src/StreamTrait.php
@@ -171,6 +171,7 @@ public function eof(): bool
      * Returns whether or not the stream is seekable.
      *
      * @return bool
+     * @psalm-suppress RiskyTruthyFalsyComparison
      */
     public function isSeekable(): bool
     {
@@ -363,6 +364,7 @@ public function getContents(): string
      * @return array|mixed|null Returns an associative array if no key is
      *     provided. Returns a specific key value if a key is provided and the
      *     value is found, or null if the key is not found.
+     * @psalm-suppress RiskyTruthyFalsyComparison
      */
     public function getMetadata($key = null)
     {
diff --git a/src/Uri.php b/src/Uri.php
index 5d4dc0d..59f61d3 100644
--- a/src/Uri.php
+++ b/src/Uri.php
@@ -358,6 +358,7 @@ public function withFragment($fragment): UriInterface
      * @param string $scheme
      * @return string
      * @throws InvalidArgumentException for invalid or unsupported schemes.
+     * @psalm-suppress RiskyTruthyFalsyComparison
      */
     private function normalizeScheme(string $scheme): string
     {