diff --git a/crates/oxc_ast_lower/Cargo.toml b/crates/oxc_ast_lower/Cargo.toml
index 2adc93248..12b90a4fb 100644
--- a/crates/oxc_ast_lower/Cargo.toml
+++ b/crates/oxc_ast_lower/Cargo.toml
@@ -12,7 +12,7 @@ repository.workspace  = true
 
 [features]
 default = []
-serde   = ["dep:serde", "oxc_hir/serde"]
+serde   = ["dep:serde", "oxc_hir/serde", "oxc_syntax/serde"]
 
 [dependencies]
 oxc_allocator = { workspace = true }
diff --git a/crates/oxc_hir/Cargo.toml b/crates/oxc_hir/Cargo.toml
index 2cb4992e4..7ed3cde96 100644
--- a/crates/oxc_hir/Cargo.toml
+++ b/crates/oxc_hir/Cargo.toml
@@ -12,7 +12,7 @@ repository.workspace  = true
 
 [features]
 default = []
-serde   = ["dep:serde", "dep:serde_json", "dep:ryu-js", "ordered-float/serde", "oxc_span/serde"]
+serde   = ["dep:serde", "dep:serde_json", "dep:ryu-js", "ordered-float/serde", "oxc_span/serde", "oxc_syntax/serde"]
 
 [dependencies]
 oxc_allocator = { workspace = true }