diff --git a/Cargo.lock b/Cargo.lock
index 965df4a4..e6fbc616 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -298,9 +298,9 @@ checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
 
 [[package]]
 name = "syn"
-version = "1.0.61"
+version = "1.0.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed22b90a0e734a23a7610f4283ac9e5acfb96cbb30dfefa540d66f866f1c09c5"
+checksum = "3fd9d1e9976102a03c542daa2eff1b43f9d72306342f3f8b3ed5fb8908195d6f"
 dependencies = [
  "proc-macro2",
  "quote",