diff --git a/tildes/development.ini b/tildes/development.ini
index bd98b21..f463e17 100644
--- a/tildes/development.ini
+++ b/tildes/development.ini
@@ -19,7 +19,9 @@ redis.unix_socket_path = /run/redis/socket
 # Requests from the host machine through Vagrant will have their IP as
 # 10.0.2.2 (which is an alias for the loopback interface) so we need
 # to enable the debugtoolbar for that IP as well.
-debugtoolbar.hosts = 127.0.0.1 ::1 10.0.2.2
+# 172.17.0.0/16 is the range of IPs that Docker uses internally so we'll need
+# those as well for the Vagrant Docker provider.
+debugtoolbar.hosts = 127.0.0.1 ::1 10.0.2.2 172.17.0.0/16
 
 # Exclude the metrics page from the debug toolbar, since Prometheus scrapes
 # it constantly and we don't need to see that in the list of requests