# ChangeLog v4
+## 4.2.0, 2021-08-30
+
+* Fixed PHP-8.1 compatibility (see gh issues #114, #115 and #118)
+* Fixed cookies failing with libcurl >= 7.77 (see gh issue #116)
+* Fixed tests using $_ENV instead of getenv() to find executables in PATH (see gh issue #113)
+* Added http\Env::reset(): resets internal HTTP request cache (see gh issue #90)
+
+## 4.1.0, 2021-04-21
+
+* Added request options:
+ * http\Client\Curl::$abstract_unix_socket
+ * http\Client\Curl::$altsvc
+ * http\Client\Curl::$altsvc_ctrl
+ * http\Client\Curl::$aws_sigv4
+ * http\Client\Curl::$doh_url
+ * http\Client\Curl::$dns_shuffle_addresses
+ * http\Client\Curl::$haproxy_protocol
+ * http\Client\Curl::$hsts
+ * http\Client\Curl::$hsts_ctrl
+ * http\Client\Curl::$http09_allowed
+ * http\Client\Curl::$maxage_conn
+ * http\Client\Curl::$pinned_publickey
+ * http\Client\Curl::$proxy_ssl
+ * http\Client\Curl::$socks5_auth
+ * http\Client\Curl::$tcp_fastopen
+ * http\Client\Curl::$tls13_ciphers
+ * http\Client\Curl::$xoauth2_bearer
+* Added request option constants:
+ * http\Client\Curl\AUTH_AWS_SIGV4
+ * http\Client\Curl\AUTH_BEARER
+ * http\Client\Curl\AUTH_NONE
+ * http\Client\Curl\HTTP_VERSION_2_PRIOR_KNOWLEDGE
+ * http\Client\Curl\HTTP_VERSION_3
+ * http\Client\Curl\SSL_VERSION_MAX_*
+ * http\Client\Curl\SSL_VERSION_TLSv1_3
+* Added library version constants:
+ * http\Client\Curl\Versions\BROTLI
+ * http\Client\Curl\Versions\CAINFO
+ * http\Client\Curl\Versions\CAPATH
+ * http\Client\Curl\Versions\HYPER
+ * http\Client\Curl\Versions\ICONV
+ * http\Client\Curl\Versions\NGHTTP2
+ * http\Client\Curl\Versions\QUIC
+ * http\Client\Curl\Versions\ZSTD
+
## 4.0.0, 2021-01-13
Changes from beta1: