diff --git a/Cargo.lock b/Cargo.lock
index 29c9b29d6bb..6eda842aaea 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3862,9 +3862,9 @@ checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.42"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c278e965f1d8cf32d6e0e96de3d3e79712178ae67986d9cf9151f51e95aac89b"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/oximeter/oximeter-macro-impl/Cargo.toml b/oximeter/oximeter-macro-impl/Cargo.toml
index ad040c29142..360d7004e22 100644
--- a/oximeter/oximeter-macro-impl/Cargo.toml
+++ b/oximeter/oximeter-macro-impl/Cargo.toml
@@ -13,7 +13,7 @@ version = "1.2.1"
 features = ["serde"]
 
 [dependencies.proc-macro2]
-version = "1.0.42"
+version = "1.0.43"
 
 [dependencies.quote]
 version = "1.0.20"