diff --git a/requirements.txt b/requirements.txt
index 4a15041..d78a0bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ dnspython
 imapclient
 mail-parser
 dateparser
-elasticsearch>=6.3.0,<7.0.0
+elasticsearch==6.3.1
 elasticsearch-dsl==6.2.1
 kafka-python
 flake8
diff --git a/setup.py b/setup.py
index 20b3cd2..090a13d 100644
--- a/setup.py
+++ b/setup.py
@@ -95,7 +95,7 @@ setup(
     install_requires=['dnspython', 'expiringdict', 'publicsuffix2',
                       'xmltodict', 'geoip2', 'urllib3<1.24,>=1.21.1',
                       'requests', 'imapclient', 'mail-parser', 'dateparser',
-                      'elasticsearch>=6.3.0,<7.0.0',
+                      'elasticsearch==6.3.1',
                       'elasticsearch-dsl==6.2.1', 'kafka-python'
                       ],