diff --git a/cerrors/http/transport.go b/cerrors/http/transport.go
index 8fc632b..52a8668 100644
--- a/cerrors/http/transport.go
+++ b/cerrors/http/transport.go
@@ -16,7 +16,7 @@ func ToCommonErrorCode(statusCode int) cerrors.ErrorCode {
 		return cerrors.NotFoundErr
 	case http.StatusNotImplemented:
 		return cerrors.UnimplementedErr
-	case http.StatusBadRequest:
+	case http.StatusBadRequest, http.StatusUnprocessableEntity:
 		return cerrors.ParameterErr
 	case http.StatusServiceUnavailable:
 		return cerrors.UnavailableErr
diff --git a/cerrors/http/transport_test.go b/cerrors/http/transport_test.go
index 392da5f..c419c57 100644
--- a/cerrors/http/transport_test.go
+++ b/cerrors/http/transport_test.go
@@ -51,6 +51,13 @@ func TestToCommonErrorCode(t *testing.T) {
 			},
 			want: cerrors.ParameterErr,
 		},
+		{
+			name: "StatusUnprocessableEntity",
+			args: args{
+				http.StatusUnprocessableEntity,
+			},
+			want: cerrors.ParameterErr,
+		},
 		{
 			name: "StatusServiceUnavailable",
 			args: args{