diff --git a/Cargo.lock b/Cargo.lock
index d1dc5cf..08aeb59 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3093,7 +3093,7 @@ dependencies = [
  "sha2 0.11.0",
  "sqlx",
  "strip-ansi-escapes",
- "syn 2.0.119",
+ "syn 3.0.0",
  "tempdir",
  "termion",
  "thiserror 2.0.19",
diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
index 8fae4f5..896ea52 100644
--- a/crates/core/Cargo.toml
+++ b/crates/core/Cargo.toml
@@ -49,6 +49,6 @@ tempdir = "0.3"
 
 [build-dependencies]
 miette = { workspace = true }
-syn = "2.0.109"
+syn = "3.0.0"
 proc-macro2 = "1.0.103"
 itertools = "0.15.0"