diff --git a/adapters/adform/adform_test.go b/adapters/adform/adform_test.go
index e59bd951858..18c85a80424 100644
--- a/adapters/adform/adform_test.go
+++ b/adapters/adform/adform_test.go
@@ -24,7 +24,7 @@ import (
 )
 
 func TestJsonSamples(t *testing.T) {
-	adapterstest.RunJSONBidderTest(t, "adformtest", NewAdformBidder(nil, "http://adx.adform.net/adx"))
+	adapterstest.RunJSONBidderTest(t, "adformtest", NewAdformBidder(nil, "https://adx.adform.net/adx"))
 }
 
 type aTagInfo struct {
@@ -259,7 +259,7 @@ func preparePrebidRequestBody(requestData aBidInfo, t *testing.T) *bytes.Buffer
 // OpenRTB auction tests
 
 func TestOpenRTBRequest(t *testing.T) {
-	bidder := NewAdformBidder(nil, "http://adx.adform.net")
+	bidder := NewAdformBidder(nil, "https://adx.adform.net")
 
 	testData := createTestData(true)
 	request := createOpenRtbRequest(&testData)
diff --git a/adapters/adform/adformtest/supplemental/user-nil.json b/adapters/adform/adformtest/supplemental/user-nil.json
index 96007d58bf1..ec89a518768 100644
--- a/adapters/adform/adformtest/supplemental/user-nil.json
+++ b/adapters/adform/adformtest/supplemental/user-nil.json
@@ -44,7 +44,7 @@
   "httpCalls": [
     {
       "expectedRequest": {
-        "uri": "http://adx.adform.net/adx?CC=1&fd=1&gdpr=1&gdpr_consent=abc2&ip=&pt=gross&rp=4&stid=&bWlkPTEmcmN1cj1VU0Q"
+        "uri": "https://adx.adform.net/adx?CC=1&fd=1&gdpr=1&gdpr_consent=abc2&ip=&pt=gross&rp=4&stid=&bWlkPTEmcmN1cj1VU0Q"
       },
       "mockResponse": {
         "status": 204
diff --git a/config/config.go b/config/config.go
index c5e736d520e..c0c0e62e06a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -652,7 +652,7 @@ func SetupViper(v *viper.Viper, filename string) {
 	v.SetDefault("adapters.rubicon.disabled", true)
 
 	v.SetDefault("adapters.adtelligent.endpoint", "http://hb.adtelligent.com/auction")
-	v.SetDefault("adapters.adform.endpoint", "http://adx.adform.net/adx")
+	v.SetDefault("adapters.adform.endpoint", "https://adx.adform.net/adx")
 	v.SetDefault("adapters.appnexus.endpoint", "http://ib.adnxs.com/openrtb2") // Docs: https://wiki.appnexus.com/display/supply/Incoming+Bid+Request+from+SSPs
 	v.SetDefault("adapters.appnexus.platform_id", "5")
 	v.SetDefault("adapters.advangelists.endpoint", "http://nep.advangelists.com/xp/get?pubid={{.PublisherID}}")