diff --git a/Cargo.lock b/Cargo.lock
index 4740cb1..c7e6b04 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -146,9 +146,9 @@ checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
+checksum = "307e3004becf10f5a6e0d59d20f3cd28231b0e0827a96cd3e0ce6d14bc1e4bb3"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index ef1c116..29fdd1d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ version = "1.0.37"
 features = ["proc-macro"]
 
 [dependencies.proc-macro2]
-version = "1.0.89"
+version = "1.0.91"
 
 [features]
 default = ["original-compatibility", "strict-syntax", "and-time", "time-backend"]