diff --git a/Cargo.lock b/Cargo.lock
index 593b32ab..4ddde8ae 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -107,9 +107,9 @@ version = "0.3.0"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.43"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
 dependencies = [
  "unicode-ident",
 ]