diff --git a/spake2/Cargo.toml b/spake2/Cargo.toml
index 789ed41..dbab323 100644
--- a/spake2/Cargo.toml
+++ b/spake2/Cargo.toml
@@ -15,7 +15,7 @@ edition = "2021"
 rust-version = "1.60"
 
 [dependencies]
-curve25519-dalek = { version = "4", default-features = false, features = ["rand_core"] }
+curve25519-dalek = { version = "4.1.3", default-features = false, features = ["rand_core"] }
 rand_core = { version = "0.6", default-features = false }
 sha2 = { version = "0.10", default-features = false }
 hkdf = { version = "0.12", default-features = false }