diff --git a/sausage/esoperations.py b/sausage/esoperations.py
index 0c3f270..82eb6b3 100644
--- a/sausage/esoperations.py
+++ b/sausage/esoperations.py
@@ -1,18 +1,23 @@
 # © All rights reserved. ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE,
 # Switzerland
 # SCITAS - Scientific IT and Application Support, 2021
 # See the LICENSE.txt file for more details.
 
-from elasticsearch import Elasticsearch
+import importlib
+for mname in "elasticsearch elasticsearch6":
+    es_spec = importlib.util.find_spec(mname)
+    if es_spec is not None:
+        from mname import Elasticsearch
+        break
 
 
 class ESOp:
     def __init__(self, server):
         self.server = Elasticsearch([server])
 
     def esget(self, index, doc):
         try:
             response = self.server.search(index=index, body=doc)
             return response
         except BaseException:
             return ""