diff --git a/Cargo.lock b/Cargo.lock
index 8ef46a062cca..f5a6c0c94cbd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1126,9 +1126,9 @@ checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
 
 [[package]]
 name = "syn"
-version = "2.0.99"
+version = "2.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e02e925281e18ffd9d640e234264753c43edc62d64b2d4cf898f1bc5e75f3fc2"
+checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/glib-macros/Cargo.toml b/glib-macros/Cargo.toml
index d2c12898ef49..6e0a1ec64508 100644
--- a/glib-macros/Cargo.toml
+++ b/glib-macros/Cargo.toml
@@ -16,7 +16,7 @@ version.workspace = true
 heck = "0.5"
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "2.0.98", features = ["full"] }
+syn = { version = "2.0.100", features = ["full"] }
 proc-macro-crate = "3.1"
 
 [lib]