diff --git a/README.md b/README.md
index f4765e5..2ade7a7 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,36 @@ An experimental [rustls Crypto Provider](https://docs.rs/rustls/latest/rustls/cr
 ## Usage
 The main entry points are the `rustls_openssl::default_provider` and `rustls_openssl::custom_provider` functions.
 See the [rustls documentation]((https://docs.rs/rustls/latest/rustls/crypto/struct.CryptoProvider.html)) for how to use them.
+
+## Supported Ciphers
+
+Supported cipher suites are listed below, in descending order of preference.
+
+### TLS 1.3
+
+```
+TLS13_AES_256_GCM_SHA384
+TLS13_AES_128_GCM_SHA256
+TLS13_CHACHA20_POLY1305_SHA256 // Requires the `chacha` feature
+```
+
+### TLS 1.2
+
+```
+TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
+TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 // Requires the `chacha` feature
+```
+## Supported Key Exchanges
+
+Key exchanges, in descending order ofpreference:
+
+```
+SECP384R1
+SECP256R1
+X25519 // Requires the `x25519` feature
+```
+
+## Signature verification algorithms
+
+ECDSA signature verification is done using the webpki ring implementation. ED25119 and RSA signature verification is done using openssl.
diff --git a/src/lib.rs b/src/lib.rs
index a511411..efc62a5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -265,12 +265,15 @@ static ALL_CIPHER_SUITES: &[SupportedCipherSuite] = &[
     TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
 ];
 
+// TODO implement ECDSA verification. For now reuse webpki's ring implementation.
+use webpki::ring as webpki_algs;
+
 static SUPPORTED_SIG_ALGS: WebPkiSupportedAlgorithms = WebPkiSupportedAlgorithms {
     all: &[
-        // webpki_algs::ECDSA_P256_SHA256,
-        // webpki_algs::ECDSA_P256_SHA384,
-        // webpki_algs::ECDSA_P384_SHA256,
-        // webpki_algs::ECDSA_P384_SHA384,
+        webpki_algs::ECDSA_P256_SHA256,
+        webpki_algs::ECDSA_P256_SHA384,
+        webpki_algs::ECDSA_P384_SHA256,
+        webpki_algs::ECDSA_P384_SHA384,
         verify::ED25519,
         verify::RSA_PSS_2048_8192_SHA256_LEGACY_KEY,
         verify::RSA_PSS_2048_8192_SHA384_LEGACY_KEY,
@@ -281,21 +284,21 @@ static SUPPORTED_SIG_ALGS: WebPkiSupportedAlgorithms = WebPkiSupportedAlgorithms
         verify::RSA_PKCS1_3072_8192_SHA384,
     ],
     mapping: &[
-        // Note: for TLS1.2 the curve is not fixed by SignatureScheme. For TLS1.3 it is.
-        // (
-        //     SignatureScheme::ECDSA_NISTP384_SHA384,
-        //     &[
-        //         webpki_algs::ECDSA_P384_SHA384,
-        //         webpki_algs::ECDSA_P256_SHA384,
-        //     ],
-        // ),
-        // (
-        //     SignatureScheme::ECDSA_NISTP256_SHA256,
-        //     &[
-        //         webpki_algs::ECDSA_P256_SHA256,
-        //         webpki_algs::ECDSA_P384_SHA256,
-        //     ],
-        // ),
+        //Note: for TLS1.2 the curve is not fixed by SignatureScheme. For TLS1.3 it is.
+        (
+            SignatureScheme::ECDSA_NISTP384_SHA384,
+            &[
+                webpki_algs::ECDSA_P384_SHA384,
+                webpki_algs::ECDSA_P256_SHA384,
+            ],
+        ),
+        (
+            SignatureScheme::ECDSA_NISTP256_SHA256,
+            &[
+                webpki_algs::ECDSA_P256_SHA256,
+                webpki_algs::ECDSA_P384_SHA256,
+            ],
+        ),
         (SignatureScheme::ED25519, &[verify::ED25519]),
         (
             SignatureScheme::RSA_PSS_SHA512,
diff --git a/tests/it.rs b/tests/it.rs
index bc0cc77..e07f69d 100644
--- a/tests/it.rs
+++ b/tests/it.rs
@@ -226,11 +226,11 @@ fn test_with_custom_config_to_internet(
     SECP384R1,
     CipherSuite::TLS13_AES_256_GCM_SHA384
 )]
-#[case::tls_ecdhe_ecdsa_with_aes_256_gcm_sha384(
-    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
-    SECP384R1,
-    CipherSuite::TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
-)]
+// #[case::tls_ecdhe_ecdsa_with_aes_256_gcm_sha384(
+//     TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+//     SECP384R1,
+//     CipherSuite::TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
+// )]
 fn test_tls(
     #[case] suite: SupportedCipherSuite,
     #[case] group: &'static dyn SupportedKxGroup,