diff --git a/Cargo.lock b/Cargo.lock
index 52d5c96..79cc438 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2559,9 +2559,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.78"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
+checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/geiger/Cargo.toml b/geiger/Cargo.toml
index cec60c0..539732d 100644
--- a/geiger/Cargo.toml
+++ b/geiger/Cargo.toml
@@ -16,7 +16,7 @@ maintenance = { status = "experimental" }
 [dependencies]
 cargo-geiger-serde = { path = "../cargo-geiger-serde", version = "0.2.3" }
 syn = { version = "1.0.109", features = ["parsing", "printing", "clone-impls", "full", "extra-traits", "visit"] }
-proc-macro2 = "1.0.78"
+proc-macro2 = "1.0.81"
 
 [dev-dependencies]
 rstest = "0.18.2"