diff --git a/Cargo.lock b/Cargo.lock
index a386b64..9eb9fb4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.15"
@@ -230,11 +232,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.24"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -357,6 +359,12 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
 [[package]]
 name = "unicode-width"
 version = "0.1.8"
diff --git a/Cargo.toml b/Cargo.toml
index 8a09dcf..588038c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ serde = { version = "1.0.123", features = ["derive"] }
 [build-dependencies]
 bindgen = "0.57.0"
 num_cpus = "1.13.0"
-proc-macro2 = "1.0.24"
+proc-macro2 = "1.0.47"
 quote = "1.0.9"
 syn = { version = "1.0.60", features = [ "extra-traits", "full", "fold", "parsing" ] }