diff --git a/requirements.txt b/requirements.txt
index 32bfd0d..a4d6669 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-django==2.1.3
-google-api-python-client==1.7.6
-oauth2client==4.1.3
-gunicorn==19.9.0
-django_heroku==0.3.1
-whitenoise==4.1.1
+django>=2.1.3
+google-api-python-client>=1.7.6
+oauth2client>=4.1.3
+gunicorn>=19.9.0
+django_heroku>=0.3.1
+whitenoise>=4.1.1