diff --git a/requirements.txt b/requirements.txt
index 6a01359..2fd5571 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,6 +17,6 @@ geoip2>=2.9.0
 imapclient>=2.1.0
 mail-parser>=3.9.2
 dateparser>=0.7.1
-elasticsearch>=6.3.1<7.0.0
-elasticsearch-dsl>=6.3.1<7.0.0
+elasticsearch>=6.3.1,<7.0.0
+elasticsearch-dsl>=6.3.1,<7.0.0
 kafka-python>=1.4.4
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 44d5699..370b869 100644
--- a/setup.py
+++ b/setup.py
@@ -97,7 +97,7 @@ setup(
                       'urllib3>=1.21.1', 'requests>=2.2.16.0',
                       'imapclient>=2.1.0', 'mail-parser>=3.9.2',
                       'dateparser>=0.7.1',
-                      'elasticsearch>=6.3.1<7.0.0',
+                      'elasticsearch>=6.3.1,<7.0.0',
                       'elasticsearch-dsl>=6.3.1,<7.0.0',
                       'kafka-python>=1.4.4',
                       'tqdm>=4.31.1'