diff --git a/Cargo.lock b/Cargo.lock
index 63a6391c..5b23a5e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -143,11 +143,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.32"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
+checksum = "dd96a1e8ed2596c337f8eae5f24924ec83f5ad5ab21ea8e455d3566c69fbcaf7"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -390,6 +390,12 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
diff --git a/propfuzz-macro/Cargo.toml b/propfuzz-macro/Cargo.toml
index 97b9f3a1..6edfffbd 100644
--- a/propfuzz-macro/Cargo.toml
+++ b/propfuzz-macro/Cargo.toml
@@ -24,7 +24,7 @@ proc-macro = true
 path = "src/lib.rs"
 
 [dependencies]
-proc-macro2 = "1.0.29"
+proc-macro2 = "1.0.40"
 quote = "1.0.10"
 syn = { version = "1.0.81", features = ["extra-traits", "full"] }