diff --git a/crates/data-model/src/oauth2/authorization_grant.rs b/crates/data-model/src/oauth2/authorization_grant.rs
index 5ae77b4e..c53ce9ea 100644
--- a/crates/data-model/src/oauth2/authorization_grant.rs
+++ b/crates/data-model/src/oauth2/authorization_grant.rs
@@ -59,7 +59,7 @@ impl Pkce {
             return Err(PkceVerificationError::TooShort);
         }
 
-        if verifier.len() > 43 {
+        if verifier.len() > 128 {
             return Err(PkceVerificationError::TooLong);
         }