diff --git a/precompiled/bin/Cargo.toml b/precompiled/bin/Cargo.toml
index 4bd097ef..3579f355 100644
--- a/precompiled/bin/Cargo.toml
+++ b/precompiled/bin/Cargo.toml
@@ -14,4 +14,4 @@ path = "main.rs"
 [dependencies]
 proc-macro2 = "1"
 quote = { version = "1", default-features = false }
-syn = { version = "2.0.25", default-features = false, features = ["clone-impls", "derive", "full", "parsing", "printing"] }
+syn = { version = "2.0.28", default-features = false, features = ["clone-impls", "derive", "full", "parsing", "printing"] }
diff --git a/precompiled/serde_derive/Cargo.toml b/precompiled/serde_derive/Cargo.toml
index b019e43e..563e40e8 100644
--- a/precompiled/serde_derive/Cargo.toml
+++ b/precompiled/serde_derive/Cargo.toml
@@ -24,7 +24,7 @@ proc-macro = true
 [target.'cfg(not(all(target_arch = "x86_64", target_os = "linux", target_env = "gnu")))'.dependencies]
 proc-macro2 = "1"
 quote = "1"
-syn = "2.0.25"
+syn = "2.0.28"
 
 [dev-dependencies]
 serde = { version = "1", path = "../../serde" }
diff --git a/serde_derive/Cargo.toml b/serde_derive/Cargo.toml
index e77c6873..2b28c25c 100644
--- a/serde_derive/Cargo.toml
+++ b/serde_derive/Cargo.toml
@@ -23,7 +23,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = "2.0.25"
+syn = "2.0.28"
 
 [dev-dependencies]
 serde = { version = "1", path = "../serde" }
diff --git a/serde_derive_internals/Cargo.toml b/serde_derive_internals/Cargo.toml
index 7e5ec1f3..dc40230f 100644
--- a/serde_derive_internals/Cargo.toml
+++ b/serde_derive_internals/Cargo.toml
@@ -17,7 +17,7 @@ path = "lib.rs"
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "2.0.25", default-features = false, features = ["clone-impls", "derive", "parsing", "printing"] }
+syn = { version = "2.0.28", default-features = false, features = ["clone-impls", "derive", "parsing", "printing"] }
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]