diff --git a/spec/Cargo.lock b/spec/Cargo.lock
index 7e8d9b8..4c3edd1 100644
--- a/spec/Cargo.lock
+++ b/spec/Cargo.lock
@@ -4,9 +4,9 @@ version = 4
 
 [[package]]
 name = "darling"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25ae13da2f202d56bd7f91c25fba009e7717a1e4a1cc98a76d844b65ae912e9d"
+checksum = "ed17f5901b6630b993ca003def43f2f8ef4014fc13b047b57aad617ff32bc2ec"
 dependencies = [
  "darling_core",
  "darling_macro",
@@ -14,26 +14,26 @@ dependencies = [
 
 [[package]]
 name = "darling_core"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9865a50f7c335f53564bb694ef660825eb8610e0a53d3e11bf1b0d3df31e03b0"
+checksum = "6837e2cf7485aaae18f86181d2f0e9a7ed297a025e220aeabf63fdebd3a2ddff"
 dependencies = [
  "ident_case",
  "proc-macro2",
  "quote",
  "strsim",
- "syn",
+ "syn 3.0.5",
 ]
 
 [[package]]
 name = "darling_macro"
-version = "0.23.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
+checksum = "2ac7135c3ef02b2f7833bbeb1be5ba7f966dcde8a87c6b87f65a778d71a02785"
 dependencies = [
  "darling_core",
  "quote",
- "syn",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -65,7 +65,7 @@ name = "spec"
 version = "0.1.0"
 dependencies = [
  "darling",
- "syn",
+ "syn 2.0.111",
 ]
 
 [[package]]
@@ -85,6 +85,17 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "3.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.11"
diff --git a/spec/Cargo.toml b/spec/Cargo.toml
index 161832c..bade990 100644
--- a/spec/Cargo.toml
+++ b/spec/Cargo.toml
@@ -9,6 +9,6 @@ path = "src/lib.rs"
 proc-macro = true
 
 [dependencies]
-darling = "0.23.0"
+darling = "0.24.0"
 syn = "2.0.103" # needed for `darling`