diff --git a/src/Request/HeaderList.php b/src/Request/HeaderList.php
index 7a0609ee..cb129990 100644
--- a/src/Request/HeaderList.php
+++ b/src/Request/HeaderList.php
@@ -19,70 +19,70 @@
  * For more detailed information:
  * https://en.wikipedia.org/wiki/List_of_HTTP_header_fields#Request_Headers
  * 
- * @property-read string $accept Content-Types that are acceptable for the
+ * @property string $accept Content-Types that are acceptable for the
  * response
- * @property-read string $accept_charset Character sets that are acceptable
- * @property-read string $accept_encoding List of acceptable encodings
- * @property-read string $accept_language List of acceptable human languages 
+ * @property string $accept_charset Character sets that are acceptable
+ * @property string $accept_encoding List of acceptable encodings
+ * @property string $accept_language List of acceptable human languages 
  * for response
- * @property-read string $accept_datetime Acceptable version in time
- * @property-read string $authorization Authentication credentials for HTTP 
+ * @property string $accept_datetime Acceptable version in time
+ * @property string $authorization Authentication credentials for HTTP 
  * authentication
- * @property-read string $cache_control Used to specify directives that MUST be 
+ * @property string $cache_control Used to specify directives that MUST be 
  * obeyed by all caching mechanisms along the request/response chain
- * @property-read string $connection What type of connection the user-agent
+ * @property string $connection What type of connection the user-agent
  * would prefer
- * @property-read string $cookie an HTTP cookie previously sent by the server 
+ * @property string $cookie an HTTP cookie previously sent by the server 
  * with Set-Cookie
- * @property-read string $content_length The length of the request body in 
+ * @property string $content_length The length of the request body in 
  * octets (8-bit bytes)
- * @property-read string $content_md5 A Base64-encoded binary MD5 sum of the
+ * @property string $content_md5 A Base64-encoded binary MD5 sum of the
  * content of the request body
- * @property-read string $content_type The MIME type of the body of the request
+ * @property string $content_type The MIME type of the body of the request
  * (used with POST and PUT requests)
- * @property-read string $date The date and time that the message was sent (in 
+ * @property string $date The date and time that the message was sent (in 
  * "HTTP-date" format as defined by RFC 7231)
- * @property-read string $expect Indicates that particular server behaviors are
+ * @property string $expect Indicates that particular server behaviors are
  * required by the client
- * @property-read string $from The email address of the user making the request
- * @property-read string $host The domain name of the server (for virtual 
+ * @property string $from The email address of the user making the request
+ * @property string $host The domain name of the server (for virtual 
  * hosting), and the TCP port number on which the server is listening. The port 
  * number may be omitted if the port is the standard port for the service 
  * requested
- * @property-read string $if_match Only perform the action if the client 
+ * @property string $if_match Only perform the action if the client 
  * supplied entity matches the same entity on the server. This is mainly for 
  * methods like PUT to only update a resource if it has not been modified 
  * since the user last updated it
- * @property-read string $if_modified_since Allows a 304 Not Modified to be 
+ * @property string $if_modified_since Allows a 304 Not Modified to be 
  * returned if content is unchanged
- * @property-read string $if_none_match Allows a 304 Not Modified to be 
+ * @property string $if_none_match Allows a 304 Not Modified to be 
  * returned if content is unchanged
- * @property-read string $if_range If the entity is unchanged, send me the 
+ * @property string $if_range If the entity is unchanged, send me the 
  * part(s) that I am missing; otherwise, send me the entire new entity
- * @property-read string $if_unmodified_since Only send the response if the 
+ * @property string $if_unmodified_since Only send the response if the 
  * entity has not been modified since a specific time
- * @property-read string $max_forwards Limit the number of times the message 
+ * @property string $max_forwards Limit the number of times the message 
  * can be forwarded through proxies or gateways
- * @property-read string $origin Initiates a request for cross-origin resource
+ * @property string $origin Initiates a request for cross-origin resource
  * sharing
- * @property-read string $pragma Implementation-specific headers that may have
+ * @property string $pragma Implementation-specific headers that may have
  * various effects anywhere along the request-response chain
- * @property-read string $proxy_authorization Authorization credentials for
+ * @property string $proxy_authorization Authorization credentials for
  * connecting to a proxy
- * @property-read string $range Request only part of an entity. Bytes are
+ * @property string $range Request only part of an entity. Bytes are
  * numbered from 0
- * @property-read string $referer This is the address of the previous web page 
+ * @property string $referer This is the address of the previous web page 
  * from which a link to the currently requested page was followed. (The word 
  * "referrer" has been misspelled in the RFC as well as in most implementations
  * to the point that it has become standard usage and is considered correct
  * terminology)
- * @property-read string $te The transfer encodings the user agent is willing
+ * @property string $te The transfer encodings the user agent is willing
  * to accept
- * @property-read string $user_agent The user agent string of the user agent
- * @property-read string $upgrade Ask the server to upgrade to another protocol
- * @property-read string $via Informs the server of proxies through which the 
+ * @property string $user_agent The user agent string of the user agent
+ * @property string $upgrade Ask the server to upgrade to another protocol
+ * @property string $via Informs the server of proxies through which the 
  * request was sent
- * @property-read string $warning A general warning about possible problems
+ * @property string $warning A general warning about possible problems
  * with the entity body
  */
 class HeaderList implements \ArrayAccess {