diff --git a/Cargo.lock b/Cargo.lock
index 69fafd1..89d6ca9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -121,9 +121,9 @@ checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
 
 [[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "da58917d35242480a05c2897064da0a80589a2a0476c9a3f2fdc83b53502e917"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/featureflag-test-macros/Cargo.toml b/featureflag-test-macros/Cargo.toml
index 5463d09..6c5b566 100644
--- a/featureflag-test-macros/Cargo.toml
+++ b/featureflag-test-macros/Cargo.toml
@@ -16,7 +16,7 @@ proc-macro = true
 proc-macro-crate = "3.3.0"
 proc-macro2 = "1.0.94"
 quote = "1.0.40"
-syn = { version = "2.0.100", features = ["full", "visit-mut"] }
+syn = { version = "2.0.108", features = ["full", "visit-mut"] }
 
 [lints]
 workspace = true