diff --git a/halo2_proofs/Cargo.toml b/halo2_proofs/Cargo.toml
index 96f84d7bb..e5607f6b9 100644
--- a/halo2_proofs/Cargo.toml
+++ b/halo2_proofs/Cargo.toml
@@ -42,8 +42,8 @@ harness = false
 
 [dependencies]
 halo2_middleware = { path = "../halo2_middleware" }
-halo2_backend = { path = "../halo2_backend" }
-halo2_frontend = { path = "../halo2_frontend" }
+halo2_backend = { path = "../halo2_backend", default-features = false }
+halo2_frontend = { path = "../halo2_frontend", default-features = false }
 halo2curves = { version = "0.6.1", default-features = false }
 rand_core = { version = "0.6", default-features = false, features = ["getrandom"] }
 plotters = { version = "0.3.0", default-features = false, optional = true }