diff --git a/requirements.in b/requirements.in
index 6f9add7a..1f174b6a 100644
--- a/requirements.in
+++ b/requirements.in
@@ -26,4 +26,5 @@ yacron
 flask-debugtoolbar
 requests_oauthlib
 pyopenssl
-aiosmtpd
\ No newline at end of file
+aiosmtpd
+dnspython
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index e210c663..382a3992 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,6 +27,7 @@ click==7.0                # via flask, pip-tools
 crontab==0.22.5           # via yacron
 cryptography==2.7         # via jwcrypto, pyopenssl
 decorator==4.4.0          # via ipython, traitlets
+dnspython==1.16.0
 docutils==0.14            # via botocore
 flask-admin==1.5.3
 flask-cors==3.0.8