diff --git a/go.mod b/go.mod
index cd1b7ec..ce78a8a 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/librespeed/speedtest
 go 1.16
 
 require (
+	github.com/breml/rootcerts v0.1.0 // indirect
 	github.com/fsnotify/fsnotify v1.5.1 // indirect
 	github.com/go-chi/chi/v5 v5.0.4
 	github.com/go-chi/cors v1.2.0
diff --git a/go.sum b/go.sum
index b7e1930..bf56dc8 100644
--- a/go.sum
+++ b/go.sum
@@ -45,6 +45,8 @@ github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmV
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bketelsen/crypt v0.0.4/go.mod h1:aI6NrJ0pMGgvZKL1iVgXLnfIFJtfV+bKCoqOes/6LfM=
+github.com/breml/rootcerts v0.1.0 h1:jf/F4MHeXBi7FVAHrPq+/MBmPlGXTbUAyR977bZ0j4E=
+github.com/breml/rootcerts v0.1.0/go.mod h1:24FDtzYMpqIeYC7QzaE8VPRQaFZU5TIUDlyk8qwjD88=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
diff --git a/main.go b/main.go
index 0bf0ed4..5560ca7 100644
--- a/main.go
+++ b/main.go
@@ -2,13 +2,15 @@ package main
 
 import (
 	"flag"
-
-	log "github.com/sirupsen/logrus"
+	_ "time/tzdata"
 
 	"github.com/librespeed/speedtest/config"
 	"github.com/librespeed/speedtest/database"
 	"github.com/librespeed/speedtest/results"
 	"github.com/librespeed/speedtest/web"
+
+	_ "github.com/breml/rootcerts"
+	log "github.com/sirupsen/logrus"
 )
 
 var (