diff --git a/aries_cloudagent/protocols/issue_credential/v2_0/formats/vc_di/models/cred_request.py b/aries_cloudagent/protocols/issue_credential/v2_0/formats/vc_di/models/cred_request.py
index 22668ae73c..9c7c156391 100644
--- a/aries_cloudagent/protocols/issue_credential/v2_0/formats/vc_di/models/cred_request.py
+++ b/aries_cloudagent/protocols/issue_credential/v2_0/formats/vc_di/models/cred_request.py
@@ -51,7 +51,7 @@ class Meta:
 
     entropy = fields.Str(
         required=True,
-        validate=INDY_DID_VALIDATE,
+        validate=str,
         metadata={"description": "Prover DID", "example": INDY_DID_EXAMPLE},
     )
     cred_def_id = fields.Str(