diff --git a/src/gConsent/manage/revokeAccessGrant.ts b/src/gConsent/manage/revokeAccessGrant.ts
index 81d33bde..adf36c1a 100644
--- a/src/gConsent/manage/revokeAccessGrant.ts
+++ b/src/gConsent/manage/revokeAccessGrant.ts
@@ -71,7 +71,7 @@ async function revokeAccessCredential(
         !credential.has(quad(namedNode(getId(credential)), TYPE, vcType)),
     )
   ) {
-    throw new Error(
+    throw new AccessGrantError(
       `An error occurred when type checking the VC: Not of type [${types.map((type) => type.value).join("] or [")}]`,
     );
   }
diff --git a/src/gConsent/request/issueAccessRequest.ts b/src/gConsent/request/issueAccessRequest.ts
index 354ce611..9be6ca2f 100644
--- a/src/gConsent/request/issueAccessRequest.ts
+++ b/src/gConsent/request/issueAccessRequest.ts
@@ -165,7 +165,7 @@ async function issueAccessRequest(
     normalize: normalizeAccessRequest,
   });
   if (!isAccessRequest(accessRequest)) {
-    throw new Error(
+    throw new AccessGrantError(
       `${JSON.stringify(accessRequest)} is not an Access Request`,
     );
   }