diff --git a/Cargo.lock b/Cargo.lock
index 6848f50603c..87d12e74e03 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4439,9 +4439,9 @@ checksum = "6bdef32e8150c2a081110b42772ffe7d7c9032b606bc226c8260fd97e0976601"
 
 [[package]]
 name = "syn"
-version = "1.0.89"
+version = "1.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea297be220d52398dcc07ce15a209fce436d361735ac1db700cab3b6cdfb9f54"
+checksum = "704df27628939572cd88d33f171cd6f896f4eaca85252c6e0a72d8d8287ee86f"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/oximeter/oximeter-macro-impl/Cargo.toml b/oximeter/oximeter-macro-impl/Cargo.toml
index 2ac296cb605..845d0a5c0b0 100644
--- a/oximeter/oximeter-macro-impl/Cargo.toml
+++ b/oximeter/oximeter-macro-impl/Cargo.toml
@@ -19,5 +19,5 @@ version = "1.0.36"
 version = "1.0.17"
 
 [dependencies.syn]
-version = "1.0.86"
+version = "1.0.90"
 features = [ "full", "derive", "extra-traits" ]