diff --git a/crates/oyster_builtin_proc/Cargo.toml b/crates/oyster_builtin_proc/Cargo.toml
index e51c192..a2ebdbc 100644
--- a/crates/oyster_builtin_proc/Cargo.toml
+++ b/crates/oyster_builtin_proc/Cargo.toml
@@ -13,7 +13,15 @@ darling = "~0.14.1"
 proc-macro-crate = "^1.2.1"
 proc-macro2 = { version = "1.0.47", default-features = false }
 quote = { version = "^1.0.21", default-features = false }
-syn = { version = "^1.0.102", default-features = false, features = [ "full" ] }
+
+[dependencies.syn]
+version = "^1.0.102"
+default-features = false
+features = [
+    "full",
+    "parsing",
+    "proc-macro",
+]
 
 [dev-dependencies]
 oyster_runtime = { version = "0.0.0", path = "../oyster_runtime" }