diff --git a/Cargo.lock b/Cargo.lock
index fffd1dc..3ee84f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -238,9 +238,9 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.79"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
+checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 dependencies = [
  "unicode-ident",
 ]
@@ -389,9 +389,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.52"
+version = "2.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b699d15b36d1f02c3e7c69f8ffef53de37aefae075d8488d4ba1a7788d574a07"
+checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index a1d7e61..5ff07ca 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,8 +37,8 @@ walkdir = "2.5.0"
 cargo_metadata = "0.18.1"
 cargo_toml = "0.20.2"
 bpaf = { version = "0.9.12", features = ["derive", "batteries"] }
-proc-macro2 = { version = "1", features = ["span-locations"] }
-syn = { version = "2", features = [
+proc-macro2 = { version = "1.0.81", features = ["span-locations"] }
+syn = { version = "2.0.60", features = [
   "full",
   "visit",
   "extra-traits", # add "extra-traits" to debug syn ast