diff --git a/curve25519-parser/Cargo.toml b/curve25519-parser/Cargo.toml
index c9137d21..d0f6f300 100644
--- a/curve25519-parser/Cargo.toml
+++ b/curve25519-parser/Cargo.toml
@@ -14,7 +14,7 @@ readme = "../README.md"
 [dependencies]
 der-parser = { version = "8", default-features = false}
 x25519-dalek = { version = "1", default-features = false}
-curve25519-dalek = { version = "3", default-features = false, features = ["u64_backend"]}
+curve25519-dalek = { version = "4", default-features = false, features = ["u64_backend"]}
 sha2 = { version = "0", default-features = false}
 pem = { version = "2", default-features = false}