diff --git a/Cargo.toml b/Cargo.toml
index c250431..4d743c6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,7 +55,7 @@ subtle = { version = "2.3", default-features = false }
 blake2b_simd = { version = "1", optional = true, default-features = false }
 
 # sqrt-table dependencies
-lazy_static = { version = "1.4.0", optional = true }
+lazy_static = { version = "1.4.0", optional = true, features = ["spin_no_std"] }
 
 # gpu dependencies
 ec-gpu = { version = "0.2.0", optional = true }