diff --git a/requirements.txt b/requirements.txt
index 8146d92..49bcfdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,13 @@
 -i https://pypi.org/simple
 -e git+https://github.com/C4ptainCrunch/ics.py.git@bd918ec7453a7cf73a906cdcc78bd88eb4bab71b#egg=ics
 arrow==0.11.0
-certifi==2019.3.9
+certifi==2019.9.11
 chardet==3.0.4
-foursquare==1!2019.2.16
+foursquare==1!2019.9.11
 idna==2.8
 python-dateutil==2.8.0
-requests==2.21.0
+pytz==2019.2
+requests==2.22.0
+simplekml==1.3.1
 six==1.12.0
-urllib3==1.24.2
+urllib3==1.25.5