diff --git a/requirements.ci.txt b/requirements.ci.txt
index b8e826a..e0b686d 100644
--- a/requirements.ci.txt
+++ b/requirements.ci.txt
@@ -12,6 +12,7 @@ MarkupSafe==1.1.1
 multidict==4.7.5
 mypy==0.770
 mypy-extensions==0.4.3
+pytz==2019.3
 requests==2.23.0
 typed-ast==1.4.1
 typing-extensions==3.7.4.2
diff --git a/requirements.txt b/requirements.txt
index 232be3b..14acc9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,8 +32,10 @@ pyee==7.0.1
 pylibsrtp==0.6.6
 pyls==0.1.6
 pyls-mypy==0.1.8
+python-dateutil==2.8.1
 python-jsonrpc-server==0.3.4
 python-language-server==0.31.9
+pytz==2019.3
 raygun4py==4.3.0
 requests==2.23.0
 six==1.14.0