diff --git a/docs/configuration.md b/docs/configuration.md
index 3fde6911..3afcf67a 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -19,7 +19,7 @@ In order to use it, you must:
 
 ### Configuration initialisation
 
-The `Lcobucci\JWT\Signer\Key` object is used for symmetric/asymmetric signature.
+The `Lcobucci\JWT\Signer\Key\InMemory` object is used for symmetric/asymmetric signature.
 
 To initialise it, you can pass the key content as a plain text:
 
@@ -83,13 +83,17 @@ use Lcobucci\JWT\Signer\Key\InMemory;
 
 $configuration = Configuration::forAsymmetricSigner(
     // You may use RSA or ECDSA and all their variations (256, 384, and 512)
-    new Signer\RSA\Sha256(),
+    new Signer\Rsa\Sha256(),
     LocalFileReference::file(__DIR__ . '/my-private-key.pem'),
     InMemory::base64Encoded('mBC5v1sOKVvbdEitdSBenu59nfNfhwkedkJVNabosTw=')
     // You may also override the JOSE encoder/decoder if needed by providing extra arguments here
 );
 ```
 
+!!! Important
+    The implementation of ECDSA algorithms have a constructor dependency.
+    Use the `create()` named constructor to avoid having to handle it (e.g.: `Lcobucci\JWT\Signer\Ecdsa\Sha256::create()`).
+
 #### For no algorithm
 
 !!! Warning