diff --git a/signature-crate/signature_derive/Cargo.toml b/signature-crate/signature_derive/Cargo.toml
index 2f04cd7..a4df613 100644
--- a/signature-crate/signature_derive/Cargo.toml
+++ b/signature-crate/signature_derive/Cargo.toml
@@ -15,7 +15,7 @@ categories    = ["cryptography", "no-std"]
 proc-macro = true
 
 [dependencies]
-proc-macro2 = "0.4"
-quote = "0.6"
-syn = "0.15"
-synstructure = "0.10"
+proc-macro2 = "1"
+quote = "1"
+syn = "1"
+synstructure = "0.12"
diff --git a/signature-crate/signature_derive/src/lib.rs b/signature-crate/signature_derive/src/lib.rs
index 00cee90..aa0953f 100644
--- a/signature-crate/signature_derive/src/lib.rs
+++ b/signature-crate/signature_derive/src/lib.rs
@@ -21,7 +21,7 @@ fn derive_signer(mut s: synstructure::Structure) -> TokenStream {
         gen impl<S> signature::Signer<S> for @Self
         where
             S: signature::DigestSignature,
-            Self: signature::DigestSigner<S::Digest, S>,
+            Self: signature::DigestSigner<S::Digest, S>
         {
             fn try_sign(&self, msg: &[u8]) -> Result<S, signature::Error> {
                 self.try_sign_digest(S::Digest::new().chain(msg))
@@ -38,7 +38,7 @@ fn derive_verifier(mut s: synstructure::Structure) -> TokenStream {
         gen impl<S> signature::Verifier<S> for @Self
         where
             S: signature::DigestSignature,
-            Self: signature::DigestVerifier<S::Digest, S>,
+            Self: signature::DigestVerifier<S::Digest, S>
         {
             fn verify(&self, msg: &[u8], signature: &S) -> Result<(), signature::Error> {
                 self.verify_digest(S::Digest::new().chain(msg), signature)
@@ -67,7 +67,7 @@ mod tests {
                     impl<S, C: EllipticCurve> signature::Signer<S> for MySigner<C>
                     where
                         S: signature::DigestSignature,
-                        Self: signature::DigestSigner<S::Digest, S>,
+                        Self: signature::DigestSigner<S::Digest, S>
                     {
                         fn try_sign(&self, msg: &[u8]) -> Result <S, signature::Error> {
                             self.try_sign_digest(S::Digest::new().chain(msg))
@@ -93,7 +93,7 @@ mod tests {
                     impl<S, C: EllipticCurve> signature::Verifier<S> for MyVerifier<C>
                     where
                         S: signature::DigestSignature,
-                        Self: signature::DigestVerifier<S::Digest, S>,
+                        Self: signature::DigestVerifier<S::Digest, S>
                     {
                         fn verify(&self, msg: &[u8], signature: &S) -> Result<(), signature::Error> {
                             self.verify_digest(S::Digest::new().chain(msg), signature)