diff --git a/serial_test/Cargo.toml b/serial_test/Cargo.toml
index 5072041..8f306db 100644
--- a/serial_test/Cargo.toml
+++ b/serial_test/Cargo.toml
@@ -11,7 +11,7 @@ categories = ["development-tools::testing"]
 keywords = ["sequential", "testing", "parallel"]
 
 [dependencies]
-once_cell = {version="^1.19", default-features = false}
+once_cell = {version="^1.19", features = ["std"], default-features = false}
 parking_lot = {version="^0.12", default-features = false}
 serial_test_derive = { version = "~3.1.1", path = "../serial_test_derive" }
 fslock = { version = "0.2", optional = true, default-features = false, features = ["std"]}
diff --git a/serial_test_derive/Cargo.toml b/serial_test_derive/Cargo.toml
index c0d8e62..6781328 100644
--- a/serial_test_derive/Cargo.toml
+++ b/serial_test_derive/Cargo.toml
@@ -14,8 +14,8 @@ proc-macro = true
 
 [dependencies]
 quote = { version="1", default-features = false}
-syn = { version="2", features=[], default-features = false}
-proc-macro2 = { version="1.0.60", default-features = false} # Because of https://github.com/dtolnay/proc-macro2/issues/356
+syn = { version="2", features=["full", "printing", "parsing", "clone-impls"], default-features = false}
+proc-macro2 = { version="1.0.60", features = ["proc-macro"], default-features = false} # Because of https://github.com/dtolnay/proc-macro2/issues/356
 
 [dev-dependencies]
 env_logger = {version=">=0.6.1", default-features = false}