diff --git a/Cargo.lock b/Cargo.lock
index 42a9aca..4f45575 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -252,7 +252,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 3.0.3",
+ "syn 3.0.4",
 ]
 
 [[package]]
@@ -480,7 +480,7 @@ dependencies = [
  "fredshell-core",
  "proc-macro2",
  "quote",
- "syn 3.0.3",
+ "syn 3.0.4",
  "trybuild",
 ]
 
@@ -983,7 +983,7 @@ checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.3",
+ "syn 3.0.4",
 ]
 
 [[package]]
@@ -1108,9 +1108,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "3.0.3"
+version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53e9bae58849f64dfa4f5d5ae372c8341f7305f82a3868709269343628b659a3"
+checksum = "e6275cddf4610d1775e6d1fe9469b2e77d0f39fd98fb7450901b821e0c53649f"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index adfddf1..5d7a370 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,7 @@ fredshell-spec-runner = { version = "=0.1.0", path = "crates/fredshell-spec-runn
 # Proc-macro toolchain
 proc-macro2 = "=1.0.107"
 quote = "=1.0.47"
-syn = { version = "=3.0.3", features = ["full"] }
+syn = { version = "=3.0.4", features = ["full"] }
 
 # Terminal / OS
 libc = "=0.2.189"