diff --git a/Cargo.lock b/Cargo.lock
index 0da853d90e..c3928c8130 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -412,7 +412,7 @@ dependencies = [
  "env_logger 0.10.2",
  "jsonwebtoken",
  "jwt-simple",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/virtee/kbs-types.git?rev=e28c20c761378b1e8f5b210c839e3c454f2ec3fb)",
  "lazy_static",
  "log",
  "mobc",
@@ -535,7 +535,7 @@ dependencies = [
  "env_logger 0.10.2",
  "futures",
  "hex",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/virtee/kbs-types.git?rev=e28c20c761378b1e8f5b210c839e3c454f2ec3fb)",
  "lazy_static",
  "log",
  "openssl",
@@ -575,7 +575,7 @@ dependencies = [
  "csv-rs",
  "hyper",
  "hyper-tls",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/huoqifeng/kbs-types.git?branch=s390x-se)",
  "log",
  "nix",
  "occlum_dcap",
@@ -1284,7 +1284,7 @@ dependencies = [
  "anyhow",
  "base64 0.21.7",
  "ctr",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/huoqifeng/kbs-types.git?branch=s390x-se)",
  "rand",
  "rsa 0.9.6",
  "serde",
@@ -2429,6 +2429,15 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "kbs-types"
+version = "0.5.3"
+source = "git+https://github.com/virtee/kbs-types.git?rev=e28c20c761378b1e8f5b210c839e3c454f2ec3fb#e28c20c761378b1e8f5b210c839e3c454f2ec3fb"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "kbs_protocol"
 version = "0.1.0"
@@ -2440,7 +2449,7 @@ dependencies = [
  "base64 0.21.7",
  "crypto",
  "jwt-simple",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/huoqifeng/kbs-types.git?branch=s390x-se)",
  "log",
  "reqwest",
  "resource_uri",
@@ -5276,7 +5285,7 @@ dependencies = [
  "eventlog-rs",
  "hex",
  "jsonwebtoken",
- "kbs-types",
+ "kbs-types 0.5.3 (git+https://github.com/virtee/kbs-types.git?rev=e28c20c761378b1e8f5b210c839e3c454f2ec3fb)",
  "log",
  "openssl",
  "rstest",
diff --git a/Cargo.toml b/Cargo.toml
index c8d8797e7e..accab69123 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ clap = { version = "4", features = ["derive"] }
 config = "0.13.3"
 env_logger = "0.10.0"
 hex = "0.4.3"
-kbs-types = { git = "https://github.com/huoqifeng/kbs-types.git", branch = "s390x-se" }
+kbs-types = { git = "https://github.com/virtee/kbs-types.git", rev = "e28c20c761378b1e8f5b210c839e3c454f2ec3fb" }
 jsonwebtoken = "9"
 log = "0.4.17"
 prost = "0.11.0"
diff --git a/kbs/docs/kbs.yaml b/kbs/docs/kbs.yaml
index b04b7b2b12..9a582e4a5b 100644
--- a/kbs/docs/kbs.yaml
+++ b/kbs/docs/kbs.yaml
@@ -212,7 +212,6 @@ components:
       required:
         - tee-pubkey
         - tee-evidence
-        - extra-params
       type: object
       properties:
         tee-pubkey:
@@ -220,11 +219,6 @@ components:
         tee-evidence:
           description: HW-TEE specific attestation evidence.
           type: object
-        extra-params:
-          description:
-            Freely formatted JSON object used for HW-TEE specific attestation
-            processes.
-          type: object
       description: >-
         KBS attestation challenge, sent in response to the KBC Request.
 
diff --git a/kbs/docs/kbs_attestation_protocol.md b/kbs/docs/kbs_attestation_protocol.md
index 4662aacb91..797696ee00 100644
--- a/kbs/docs/kbs_attestation_protocol.md
+++ b/kbs/docs/kbs_attestation_protocol.md
@@ -147,8 +147,6 @@ evidence from the HW-TEE platform and organizes it into the following payload:
 
     /* The attestation evidence. Its format is specified by Attestation-Service. */
     "tee-evidence": {}
-    /* Extra parameters to support some special HW-TEE attestation. */
-    "extra-params": {}
 }
 ```
 > **Note:** the `/*...*/` comments are not valid in JSON, and must not be used.
@@ -180,11 +178,6 @@ Attestation-Service.
 The KBS does not parse or analyze the attestation evidence, it forwards it to
 the Attestation-Service for verification.
 
-- `extra-params`
-
-The reserved extra parameter field which is used to pass the additional
-information provided by the KBS when some specific HW-TEE needs to be attested.
-
 ## `Response`
 
 Upon successful attestation, the KBC can request resources from the KBS, by
diff --git a/kbs/src/api/src/attestation/coco/builtin.rs b/kbs/src/api/src/attestation/coco/builtin.rs
index 75b4cb7d43..b9d017f60e 100644
--- a/kbs/src/api/src/attestation/coco/builtin.rs
+++ b/kbs/src/api/src/attestation/coco/builtin.rs
@@ -29,7 +29,7 @@ impl Attest for BuiltInCoCoAs {
         let attestation: Attestation = serde_json::from_str(attestation)?;
 
         // TODO: align with the guest-components/kbs-protocol side.
-        let runtime_data_plaintext = json!({"tee-pubkey": attestation.tee_pubkey, "nonce": nonce, "extra-params": attestation.extra_params});
+        let runtime_data_plaintext = json!({"tee-pubkey": attestation.tee_pubkey, "nonce": nonce});
 
         self.inner
             .read()
diff --git a/kbs/src/api/src/attestation/coco/grpc.rs b/kbs/src/api/src/attestation/coco/grpc.rs
index 78784cf206..e478df8d31 100644
--- a/kbs/src/api/src/attestation/coco/grpc.rs
+++ b/kbs/src/api/src/attestation/coco/grpc.rs
@@ -102,7 +102,7 @@ impl Attest for GrpcClientPool {
         let attestation: Attestation = serde_json::from_str(attestation)?;
 
         // TODO: align with the guest-components/kbs-protocol side.
-        let runtime_data_plaintext = json!({"tee-pubkey": attestation.tee_pubkey, "nonce": nonce, "extra-params": attestation.extra_params});
+        let runtime_data_plaintext = json!({"tee-pubkey": attestation.tee_pubkey, "nonce": nonce});
         let runtime_data_plaintext = serde_json::to_string(&runtime_data_plaintext)
             .context("CoCo AS client: serialize runtime data failed")?;
 
diff --git a/kbs/tools/attest.json b/kbs/tools/attest.json
index 6cad336878..dd768b3eba 100644
--- a/kbs/tools/attest.json
+++ b/kbs/tools/attest.json
@@ -4,6 +4,5 @@
     "k-mod": "my_modulus",
     "k-exp": "my_exponent"
   },
-  "tee-evidence": "my_evidence",
-  "extra-params": "my_extra_params"
+  "tee-evidence": "my_evidence"
 }