diff --git a/cryptography/bls12_381/Cargo.toml b/cryptography/bls12_381/Cargo.toml
index 8bfa8509..3756b180 100644
--- a/cryptography/bls12_381/Cargo.toml
+++ b/cryptography/bls12_381/Cargo.toml
@@ -32,6 +32,9 @@ subtle = { version = ">=2.5.0, <3.0" }
 criterion = "0.5.1"
 rand = "0.8.4"
 
+[features]
+blst-no-threads = ["blst/no-threads"]
+
 [[bench]]
 name = "benchmark"
 harness = false
diff --git a/maybe_rayon/Cargo.toml b/maybe_rayon/Cargo.toml
index 59183b0f..072443fa 100644
--- a/maybe_rayon/Cargo.toml
+++ b/maybe_rayon/Cargo.toml
@@ -12,5 +12,4 @@ repository = { workspace = true }
 rayon = { workspace = true, optional = true }
 
 [features]
-default = []
 multithreading = ["rayon"]