diff --git a/Cargo.lock b/Cargo.lock
index dcf7ee69c..f48283c53 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -377,7 +377,7 @@ checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -1586,7 +1586,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -2471,7 +2471,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -3975,7 +3975,7 @@ checksum = "4c614d17805b093df4b147b51339e7e44bf05ef59fba1e45d83500bcfb4d8585"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -4309,9 +4309,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.12"
+version = "2.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79d9531f94112cfc3e4c8f5f02cb2b58f72c97b7efd85f70203cc6d8efda5927"
+checksum = "4c9da457c5285ac1f936ebd076af6dac17a61cfe7826f2076b4d015cf47bc8ec"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4359,7 +4359,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
@@ -4598,7 +4598,7 @@ checksum = "61a573bdc87985e9d6ddeed1b3d864e8a302c847e40d647746df2f1de209d1ce"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.12",
+ "syn 2.0.13",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 7cfc63d57..54ed9df48 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -127,7 +127,7 @@ sketching = { path = "./libs/sketching" }
 smartstring = "^1.0.1"
 smolset = "^1.3.1"
 sshkeys = "^0.3.1"
-syn = { version = "2.0.12", features = ["full"] }
+syn = { version = "2.0.13", features = ["full"] }
 testkit-macros = { path = "./server/testkit-macros" }
 tide = "^0.16.0"
 # Including brotli *very* slow, so don't do that. Including the "default" feature pulls a mime-type list from the internet on build, which isn't used.