diff --git a/Cargo.lock b/Cargo.lock
index 56239f59258e..cbc72757c380 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -199,7 +199,7 @@ checksum = "8d3a45e77e34375a7923b1e8febb049bb011f064714a8e17a1a616fef01da13d"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -1400,7 +1400,7 @@ dependencies = [
  "diem-workspace-hack",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -1741,7 +1741,7 @@ dependencies = [
  "diem-workspace-hack",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -2297,7 +2297,7 @@ dependencies = [
  "serde",
  "sha-1 0.9.2",
  "subtle",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -2581,7 +2581,7 @@ dependencies = [
  "once_cell",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -2977,7 +2977,7 @@ dependencies = [
  "proc-macro-hack",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -3463,7 +3463,7 @@ dependencies = [
  "proc-macro-hack",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -4617,7 +4617,7 @@ checksum = "876a53fff98e03a936a674b29568b0e605f06b29372c2489ff4de23f1949743d"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -4681,7 +4681,7 @@ dependencies = [
  "diem-workspace-hack",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -4870,7 +4870,7 @@ dependencies = [
  "pest_meta",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -4920,7 +4920,7 @@ checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -4931,7 +4931,7 @@ checksum = "f8e8d2bf0b23038a4424865103a4df472855692821aab4e4f5c3312d461d9e5f"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -5030,7 +5030,7 @@ dependencies = [
  "proc-macro-error-attr",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
  "version_check",
 ]
 
@@ -5158,7 +5158,7 @@ dependencies = [
  "itertools 0.8.2",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -5480,7 +5480,7 @@ checksum = "0c523ccaed8ac4b0288948849a350b37d3035827413c458b6a40ddb614bb4f72"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -5537,7 +5537,7 @@ checksum = "475e68978dc5b743f2f40d8e0a8fdc83f1c5e78cbf4b8fa5e74e73beebc340de"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6075,7 +6075,7 @@ checksum = "c84d3526699cd55261af4b941e4e725444df67aa4f9e6a3564f18030d12672df"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6145,7 +6145,7 @@ checksum = "b2acd6defeddb41eb60bb468f8825d0cfd0c2a76bc03bfd235b6a1dc4f6a1ad5"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6512,7 +6512,7 @@ dependencies = [
  "quote 1.0.8",
  "serde",
  "serde_derive",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6528,7 +6528,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "sha1",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6644,7 +6644,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6699,9 +6699,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.55"
+version = "1.0.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a571a711dddd09019ccc628e1b17fe87c59b09d513c06c026877aa708334f37a"
+checksum = "3fd9d1e9976102a03c542daa2eff1b43f9d72306342f3f8b3ed5fb8908195d6f"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
@@ -6716,7 +6716,7 @@ checksum = "b834f2d66f734cb897113e34aaff2f1ab4719ca946f9a7358dba8f8064148701"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
  "unicode-xid 0.2.1",
 ]
 
@@ -6864,7 +6864,7 @@ checksum = "9ba20f23e85b10754cd195504aebf6a27e2e6cbe28c17778a0c930724628dd56"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -6922,7 +6922,7 @@ dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
  "standback",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -7027,7 +7027,7 @@ checksum = "e44da00bfc73a25f814cd8d7e57a68a5c31b74b3152a0a1d1f590c97ed06265a"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
 ]
 
 [[package]]
@@ -7553,7 +7553,7 @@ dependencies = [
  "log",
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
  "wasm-bindgen-shared",
 ]
 
@@ -7587,7 +7587,7 @@ checksum = "b5a48c72f299d80557c7c62e37e7225369ecc0c963964059509fbafe917c7549"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -7801,6 +7801,6 @@ checksum = "c3f369ddb18862aba61aa49bf31e74d29f0f162dec753063200e1dc084345d16"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.8",
- "syn 1.0.55",
+ "syn 1.0.64",
  "synstructure",
 ]
diff --git a/common/logger/derive/Cargo.toml b/common/logger/derive/Cargo.toml
index 8a9772386857..7efe3dbd141c 100644
--- a/common/logger/derive/Cargo.toml
+++ b/common/logger/derive/Cargo.toml
@@ -13,6 +13,6 @@ proc-macro = true
 
 [dependencies]
 diem-workspace-hack = { path = "../../workspace-hack", version = "0.1.0" }
-syn = { version = "1.0.55", features = ["extra-traits"] }
+syn = { version = "1.0.64", features = ["extra-traits"] }
 quote = "1.0.8"
 proc-macro2 = "1.0.24"
diff --git a/common/num-variants/Cargo.toml b/common/num-variants/Cargo.toml
index afc7892aad08..88dc78ea2a61 100644
--- a/common/num-variants/Cargo.toml
+++ b/common/num-variants/Cargo.toml
@@ -10,7 +10,7 @@ license = "Apache-2.0"
 proc-macro = true
 
 [dependencies]
-syn = "1.0.55"
+syn = "1.0.64"
 quote = "1.0.8"
 proc-macro2 = "1.0.24"
 diem-workspace-hack = { path = "../workspace-hack", version = "0.1.0" }
diff --git a/common/workspace-hack/Cargo.toml b/common/workspace-hack/Cargo.toml
index c29744c7aabf..d44d8a54175d 100644
--- a/common/workspace-hack/Cargo.toml
+++ b/common/workspace-hack/Cargo.toml
@@ -27,4 +27,4 @@ sha-1 = { version = "0.9.2", features = ["std"] }
 subtle = { version = "2.4.0", features = ["i128", "std"] }
 
 [build-dependencies]
-syn = { version = "1.0.55", features = ["clone-impls", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "visit", "visit-mut"] }
+syn = { version = "1.0.64", features = ["clone-impls", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "visit", "visit-mut"] }
diff --git a/crypto/crypto-derive/Cargo.toml b/crypto/crypto-derive/Cargo.toml
index f7a8b207b047..0bc756fd1b10 100644
--- a/crypto/crypto-derive/Cargo.toml
+++ b/crypto/crypto-derive/Cargo.toml
@@ -13,7 +13,7 @@ proc-macro = true
 
 [dependencies]
 diem-workspace-hack = { path = "../../common/workspace-hack", version = "0.1.0" }
-syn = { version = "1.0.55", features = ["derive"] }
+syn = { version = "1.0.64", features = ["derive"] }
 quote = "1.0.8"
 proc-macro2 = "1.0.24"