diff --git a/src/main/java/org/opendatakit/aggregate/externalservice/JsonServer.java b/src/main/java/org/opendatakit/aggregate/externalservice/JsonServer.java
index eaac6341e8..5088878210 100644
--- a/src/main/java/org/opendatakit/aggregate/externalservice/JsonServer.java
+++ b/src/main/java/org/opendatakit/aggregate/externalservice/JsonServer.java
@@ -134,7 +134,7 @@ private void sendRequest(String url, HttpEntity postBody, CallingContext cc)
       }
       if (statusCode == HttpServletResponse.SC_UNAUTHORIZED) {
         throw new ODKExternalServiceCredentialsException(reason + " (" + statusCode + ")");
-      } else if (statusCode != HttpServletResponse.SC_OK) {
+      } else if (statusCode < HttpServletResponse.SC_OK || statusCode >= 300) {
         throw new ODKExternalServiceException(reason + " (" + statusCode + ")");
       }
     } catch (ODKExternalServiceException e) {