diff --git a/5.0/en/0x51-V51-OAuth2.md b/5.0/en/0x51-V51-OAuth2.md
index d66eb0af30..a800d9c5da 100644
--- a/5.0/en/0x51-V51-OAuth2.md
+++ b/5.0/en/0x51-V51-OAuth2.md
@@ -27,6 +27,7 @@ There are various different personas in the OAuth process, described in more det
 | **51.2.10** | [ADDED] Verify that the client is confidential and the authorization server requires the use of strong client authentication methods (based on public-key cryptography and resistant to replay attacks), i. e. 'mTLS' or 'private-key-jwt'. | | | ✓ |
 | **51.2.11** | [ADDED] Verify that the authorization server issues only sender-constrained (Proof-of-Posession) access tokens, either using mTLS certificate binding or Demonstration of Proof of Possession (DPoP). | | | ✓ |
 | **51.2.12** | [ADDED] Verify that for a given client, the authorization server only allows the 'response_mode' value that this client needs to use. | ✓ | ✓ | ✓ |
+| **51.2.13** | [ADDED] Verify that refresh tokens have an absolute expiration, including if sliding refresh token expiration is applied. | ✓ | ✓ | ✓ |
 
 ## V51.3 OAuth Client