diff --git a/README.md b/README.md
index 6d3f86d..1f76936 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@ required, the key MUST support PIV or OpenPGP.
 
 Tiny encrypt for Rust
 
+Specification: [Tiny Encrypt Spec V1.1](https://github.com/OpenWebStandard/tiny-encrypt-format-spec/blob/main/TinyEncryptSpecv1.1.md)
+
 > Tiny encrypt rs is a Rust implementation of Tiny encrypt java https://git.hatter.ink/hatter/tiny-encrypt-java <br>
 > Tiny encrypt spec see: https://github.com/OpenWebStandard/tiny-encrypt-format-spec
 
diff --git a/src/spec.rs b/src/spec.rs
index bcf04d6..33715bb 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -12,7 +12,7 @@ use crate::util::{encode_base64, get_user_agent};
 pub const TINY_ENCRYPT_VERSION_10: &str = "1.0";
 pub const TINY_ENCRYPT_VERSION_11: &str = "1.1";
 
-/// Specification: [Tiny Encrypt Spec V1.1](https://git.hatter.ink/hatter/tiny-encrypt-java/src/branch/master/TinyEncryptSpecV1.1.md)
+/// Specification: [Tiny Encrypt Spec V1.1](https://github.com/OpenWebStandard/tiny-encrypt-format-spec/blob/main/TinyEncryptSpecv1.1.md)
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct TinyEncryptMeta {