diff --git a/crates/sui-crypto/Cargo.toml b/crates/sui-crypto/Cargo.toml
index b6da3c94e..18be4a4cf 100644
--- a/crates/sui-crypto/Cargo.toml
+++ b/crates/sui-crypto/Cargo.toml
@@ -94,7 +94,7 @@ hex = "0.4.3"
 serde_json = { version = "1.0.128" }
 
 # proptest support in tests
-proptest = { version = "1.6.0", default-features = false, features = ["std"], optional = true }
+proptest = { version = "1.6.0", default-features = false, features = ["std"] }
 test-strategy = "0.4.0"
 
 [target.wasm32-unknown-unknown.dev-dependencies]