diff --git a/README.md b/README.md
index 975c529..c4dedbe 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 Add the following to Cargo.toml:
 
 ```toml
-jsonwebtoken = "4"
+jsonwebtoken = "5"
 serde_derive = "1"
 serde = "1"
 ```
diff --git a/src/crypto.rs b/src/crypto.rs
index b26c21c..110de2e 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -79,10 +79,6 @@ pub fn sign(signing_input: &str, key: &[u8], algorithm: Algorithm) -> Result<Str
         Algorithm::HS512 => sign_hmac(&digest::SHA512, key, signing_input),
 
         Algorithm::RS256 | Algorithm::RS384 | Algorithm::RS512 => sign_rsa(algorithm, key, signing_input),
-//        TODO: if PKCS1 is made public, remove the line above and uncomment below
-//        Algorithm::RS256 => sign_rsa(&signature::RSA_PKCS1_SHA256, key, signing_input),
-//        Algorithm::RS384 => sign_rsa(&signature::RSA_PKCS1_SHA384, key, signing_input),
-//        Algorithm::RS512 => sign_rsa(&signature::RSA_PKCS1_SHA512, key, signing_input),
     }
 }