diff --git a/Cargo.toml b/Cargo.toml
index 2a8c53c..c99535d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,16 +10,16 @@ license = "Apache-2.0"
 [features]
 default = [ "std" ]
 alloc = ["base64/alloc",  "serde/alloc", "serde_json/alloc" ]
-std = ["base64/std", "serde/std", "serde_json/std", "thiserror/std", "dep:ear"]
+std = ["base64/std", "serde/std", "serde_json/std", "sha2/std", "sm3/std", "strum/std", "thiserror/std", "dep:ear"]
 
 [dependencies]
 base64 = { version = "0.22.1", default-features = false }
 ear = { version = "0.4.0", optional = true }
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 serde_json = { version = "1.0", default-features = false }
-sha2 = "0.10"
-sm3 = "0.4.2"
-strum = { version = "0.27", features = ["derive"] }
+sha2 = { version = "0.10", default-features = false }
+sm3 = { version = "0.4.2", default-features = false }
+strum = { version = "0.27", default-features = false, features = ["derive"] }
 thiserror = { version = "2.0.3", default-features = false }
 
 [dev-dependencies]