diff --git a/Cargo.lock b/Cargo.lock
index f67d2b4b1..67e2c1c0d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -204,7 +204,7 @@ checksum = "0e97ce7de6cf12de5d7226c73f5ba9811622f4db3a5b91b55c53e987e5f91cba"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -226,7 +226,7 @@ checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -237,7 +237,7 @@ checksum = "bc00ceb34980c03614e35a3a4e218276a0a824e911d07651cd0d858a51e8c0f0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -360,7 +360,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -464,7 +464,7 @@ dependencies = [
  "regex",
  "rustc-hash",
  "shlex",
- "syn 2.0.29",
+ "syn 2.0.31",
  "which",
 ]
 
@@ -707,7 +707,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1126,7 +1126,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1148,7 +1148,7 @@ checksum = "836a9bbc7ad63342d6d6e7b815ccab164bc77a2d95d84bc3117a8c0d5c98e2d5"
 dependencies = [
  "darling_core 0.20.3",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1281,7 +1281,7 @@ checksum = "487585f4d0c6655fe74905e2504d8ad6908e4db67f744eb140876906c2f3175d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1334,7 +1334,7 @@ checksum = "eecf8589574ce9b895052fa12d69af7a233f99e6107f5cb8dd1044f2a17bfdcb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1354,7 +1354,7 @@ checksum = "ccb14d927583dd5c2eac0f2cf264fc4762aefe1ae14c47a8a20fc1939d3a5fc0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1374,7 +1374,7 @@ checksum = "5e9a1f9f7d83e59740248a6e14ecf93929ade55027844dfcea78beafccc15745"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1395,7 +1395,7 @@ dependencies = [
  "darling 0.20.3",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -1641,7 +1641,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -2591,7 +2591,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -3284,7 +3284,7 @@ checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -3545,7 +3545,7 @@ checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -3628,7 +3628,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c64d9ba0963cdcea2e1b2230fbae2bab30eb25a174be395c41e764bfb65dd62"
 dependencies = [
  "proc-macro2",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4210,7 +4210,7 @@ checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4272,7 +4272,7 @@ dependencies = [
  "darling 0.20.3",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4492,9 +4492,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.29"
+version = "2.0.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
+checksum = "718fa2415bcb8d8bd775917a1bf12a7931b6dfa890753378538118181e0cb398"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4545,7 +4545,7 @@ dependencies = [
  "kanidmd_core",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4565,7 +4565,7 @@ checksum = "6bb623b56e39ab7dcd4b1b98bb6c8f8d907ed255b18de254088016b27a8ee19b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4690,7 +4690,7 @@ checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -4853,7 +4853,7 @@ checksum = "5f4f31f56159e98206da9efd823404b79b6ef3143b4a7ab76e67b1751b25a4ab"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
@@ -5137,7 +5137,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
  "wasm-bindgen-shared",
 ]
 
@@ -5171,7 +5171,7 @@ checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -5712,7 +5712,7 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index fdbec4ac6..56a6c1700 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -173,7 +173,7 @@ sketching = { path = "./libs/sketching" }
 smartstring = "^1.0.1"
 smolset = "^1.3.1"
 sshkeys = "^0.3.1"
-syn = { version = "2.0.29", features = ["full"] }
+syn = { version = "2.0.31", features = ["full"] }
 testkit-macros = { path = "./server/testkit-macros" }
 time = { version = "^0.3.21", features = ["formatting", "local-offset"] }