diff --git a/rust/vapid/CHANGELOG.md b/rust/vapid/CHANGELOG.md
index 17ae579..aa62be1 100644
--- a/rust/vapid/CHANGELOG.md
+++ b/rust/vapid/CHANGELOG.md
@@ -1,3 +1,9 @@
+# 0.4.0
+
+* Changed `VapidErrors` to be more Clippy friendly
+* updates for latest rust
+
+
 # 0.2.0
 
 Due to changes in the OpenSSL library, several calls changed form from `0.1.0`
diff --git a/rust/vapid/Cargo.toml b/rust/vapid/Cargo.toml
index b002def..4ae33c7 100644
--- a/rust/vapid/Cargo.toml
+++ b/rust/vapid/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "vapid"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["jrconlin <jconlin+git@mozilla.com>"]
 edition = "2018"
 description = "An implementation of the RFC 8292 Voluntary Application Server Identification (VAPID) Auth header generator"
@@ -11,5 +11,5 @@ license = "MPL 2.0"
 openssl = "0.10"
 serde_json = "1.0"
 base64 = "0.13"
-time = "0.2"
+time = "0.3"
 failure = "0.1"
diff --git a/rust/vapid/src/error.rs b/rust/vapid/src/error.rs
index 6fd6505..3a3cefe 100644
--- a/rust/vapid/src/error.rs
+++ b/rust/vapid/src/error.rs
@@ -15,11 +15,11 @@ pub struct VapidError {
 #[derive(Clone, Eq, PartialEq, Debug, Fail)]
 pub enum VapidErrorKind {
     #[fail(display = "Invalid public key")]
-    PublicKeyError,
+    PublicKey,
     #[fail(display = "VAPID error: {}", _0)]
-    VapidError(String),
+    Protocol(String),
     #[fail(display = "Internal Error {:?}", _0)]
-    InternalError(String),
+    Internal(String),
 }
 
 impl Fail for VapidError {
@@ -52,6 +52,6 @@ impl From<Context<VapidErrorKind>> for VapidError {
 
 impl From<Error> for VapidError {
     fn from(err: Error) -> VapidError {
-        VapidErrorKind::InternalError(format!("Error: {:?}", err)).into()
+        VapidErrorKind::Internal(format!("Error: {:?}", err)).into()
     }
 }
diff --git a/rust/vapid/src/lib.rs b/rust/vapid/src/lib.rs
index b3e3c0f..179cdb6 100644
--- a/rust/vapid/src/lib.rs
+++ b/rust/vapid/src/lib.rs
@@ -112,7 +112,7 @@ impl Key {
         let group = ec::EcGroup::from_curve_name(nid::Nid::X9_62_PRIME256V1)?;
         if bytes.len() != 65 || bytes[0] != 4 {
             // It's not a properly tagged key.
-            return Err(error::VapidErrorKind::PublicKeyError.into());
+            return Err(error::VapidErrorKind::PublicKey.into());
         }
         let point = ec::EcPoint::from_bytes(&group, &bytes, &mut ctx)?;
         Ok(ec::EcKey::from_public_key(&group, &point)?)
@@ -186,14 +186,14 @@ pub fn sign<S: BuildHasher>(
     match claims.get("sub") {
         Some(sub) => {
             if !sub.as_str().unwrap().starts_with("mailto") {
-                return Err(error::VapidErrorKind::VapidError(
+                return Err(error::VapidErrorKind::Protocol(
                     "'sub' not a valid HTML reference".to_owned(),
                 )
                 .into());
             }
         }
         None => {
-            return Err(error::VapidErrorKind::VapidError("'sub' not found".to_owned()).into());
+            return Err(error::VapidErrorKind::Protocol("'sub' not found".to_owned()).into());
         }
     }
     let today = SystemTime::now();
@@ -205,13 +205,13 @@ pub fn sign<S: BuildHasher>(
         Some(exp) => {
             let exp_val = exp.as_i64().unwrap();
             if (exp_val as u64) < to_secs(today) {
-                return Err(error::VapidErrorKind::VapidError(
+                return Err(error::VapidErrorKind::Protocol(
                     r#""exp" already expired"#.to_owned(),
                 )
                 .into());
             }
             if (exp_val as u64) > to_secs(tomorrow) {
-                return Err(error::VapidErrorKind::VapidError(
+                return Err(error::VapidErrorKind::Protocol(
                     r#""exp" set too far ahead"#.to_owned(),
                 )
                 .into());
@@ -219,7 +219,7 @@ pub fn sign<S: BuildHasher>(
         }
         None => {
             // We already do an insertion on empty, so this should never trigger.
-            return Err(error::VapidErrorKind::VapidError(
+            return Err(error::VapidErrorKind::Protocol(
                 r#""exp" failed to initialize"#.to_owned(),
             )
             .into());
@@ -238,7 +238,7 @@ pub fn sign<S: BuildHasher>(
     let mut signer = match Signer::new(MessageDigest::sha256(), &pub_key) {
         Ok(t) => t,
         Err(err) => {
-            return Err(error::VapidErrorKind::VapidError(format!(
+            return Err(error::VapidErrorKind::Protocol(format!(
                 "Could not sign the claims: {:?}",
                 err
             ))
@@ -290,8 +290,7 @@ pub fn sign<S: BuildHasher>(
 
 pub fn verify(auth_token: String) -> Result<HashMap<String, serde_json::Value>, String> {
     //Verify that the auth token string matches for the verification token string
-    let auth_token =
-        parse_auth_token(&auth_token).expect("Authorization header is invalid.");
+    let auth_token = parse_auth_token(&auth_token).expect("Authorization header is invalid.");
     let pub_ec_key =
         Key::from_public_raw(auth_token.k).expect("'k' token is not a valid public key");
     let pub_key = &match PKey::from_ec_key(pub_ec_key) {
@@ -401,18 +400,18 @@ mod tests {
         assert!(result.contains(" vapid "));
 
         // tear apart the auth token for the happy bits
-        let token = result.split(" ").nth(2).unwrap();
-        let sub_parts: Vec<&str> = token.split(",").collect();
+        let token = result.split(' ').nth(2).unwrap();
+        let sub_parts: Vec<&str> = token.split(',').collect();
         let mut auth_parts: HashMap<String, String> = HashMap::new();
         for kvi in &sub_parts {
-            let kv: Vec<String> = kvi.splitn(2, "=").map(|x| String::from(x)).collect();
+            let kv: Vec<String> = kvi.splitn(2, '=').map(String::from).collect();
             auth_parts.insert(kv[0].clone(), kv[1].clone());
         }
         assert!(auth_parts.contains_key("t"));
         assert!(auth_parts.contains_key("k"));
 
         // now tear apart the token
-        let token: Vec<&str> = auth_parts.get("t").unwrap().split(".").collect();
+        let token: Vec<&str> = auth_parts.get("t").unwrap().split('.').collect();
         assert_eq!(token.len(), 3);
 
         let content =