diff --git a/adapters/pubmatic/pubmatic_test.go b/adapters/pubmatic/pubmatic_test.go
index 4eb66d25430..be086f5adf1 100644
--- a/adapters/pubmatic/pubmatic_test.go
+++ b/adapters/pubmatic/pubmatic_test.go
@@ -23,7 +23,7 @@ import (
 )
 
 func TestJsonSamples(t *testing.T) {
-	adapterstest.RunJSONBidderTest(t, "pubmatictest", NewPubmaticBidder(nil, "http://hbopenbid.pubmatic.com/translator?source=prebid-server"))
+	adapterstest.RunJSONBidderTest(t, "pubmatictest", NewPubmaticBidder(nil, "https://hbopenbid.pubmatic.com/translator?source=prebid-server"))
 }
 
 // ----------------------------------------------------------------------------
diff --git a/adapters/pubmatic/pubmatictest/exemplary/simple-banner.json b/adapters/pubmatic/pubmatictest/exemplary/simple-banner.json
index e669bce8826..1eb8a212bff 100644
--- a/adapters/pubmatic/pubmatictest/exemplary/simple-banner.json
+++ b/adapters/pubmatic/pubmatictest/exemplary/simple-banner.json
@@ -43,7 +43,7 @@
     "httpCalls": [
       {
         "expectedRequest": {
-          "uri": "http://hbopenbid.pubmatic.com/translator?source=prebid-server",
+          "uri": "https://hbopenbid.pubmatic.com/translator?source=prebid-server",
           "body": {
             "id": "test-request-id",
             "imp": [
diff --git a/adapters/pubmatic/pubmatictest/exemplary/video.json b/adapters/pubmatic/pubmatictest/exemplary/video.json
index f9cfc2976ea..25ed366ee05 100644
--- a/adapters/pubmatic/pubmatictest/exemplary/video.json
+++ b/adapters/pubmatic/pubmatictest/exemplary/video.json
@@ -49,7 +49,7 @@
     "httpCalls": [
       {
         "expectedRequest": {
-          "uri": "http://hbopenbid.pubmatic.com/translator?source=prebid-server",
+          "uri": "https://hbopenbid.pubmatic.com/translator?source=prebid-server",
           "body": {
             "id": "test-video-request",
             "imp": [
diff --git a/adapters/pubmatic/pubmatictest/supplemental/app.json b/adapters/pubmatic/pubmatictest/supplemental/app.json
index a2b737f0aa2..636433ca1f5 100644
--- a/adapters/pubmatic/pubmatictest/supplemental/app.json
+++ b/adapters/pubmatic/pubmatictest/supplemental/app.json
@@ -43,7 +43,7 @@
     "httpCalls": [
       {
         "expectedRequest": {
-          "uri": "http://hbopenbid.pubmatic.com/translator?source=prebid-server",
+          "uri": "https://hbopenbid.pubmatic.com/translator?source=prebid-server",
           "body": {
             "id": "app-request",
             "imp": [
diff --git a/adapters/pubmatic/pubmatictest/supplemental/multiplemedia.json b/adapters/pubmatic/pubmatictest/supplemental/multiplemedia.json
index faf71fec1b6..a576abe6198 100644
--- a/adapters/pubmatic/pubmatictest/supplemental/multiplemedia.json
+++ b/adapters/pubmatic/pubmatictest/supplemental/multiplemedia.json
@@ -29,7 +29,7 @@
     "httpCalls": [
         {
           "expectedRequest": {
-            "uri": "http://hbopenbid.pubmatic.com/translator?source=prebid-server",
+            "uri": "https://hbopenbid.pubmatic.com/translator?source=prebid-server",
             "body": {
               "id": "multiple-media-request",
               "imp": [
diff --git a/config/config.go b/config/config.go
index 59f41e9131f..d586021fd14 100644
--- a/config/config.go
+++ b/config/config.go
@@ -693,7 +693,7 @@ func SetupViper(v *viper.Viper, filename string) {
 	v.SetDefault("adapters.marsmedia.endpoint", "https://bid306.rtbsrv.com/bidder/?bid=f3xtet")
 	v.SetDefault("adapters.mgid.endpoint", "https://prebid.mgid.com/prebid/")
 	v.SetDefault("adapters.openx.endpoint", "http://rtb.openx.net/prebid")
-	v.SetDefault("adapters.pubmatic.endpoint", "http://hbopenbid.pubmatic.com/translator?source=prebid-server")
+	v.SetDefault("adapters.pubmatic.endpoint", "https://hbopenbid.pubmatic.com/translator?source=prebid-server")
 	v.SetDefault("adapters.pubnative.endpoint", "http://dsp.pubnative.net/bid/v1/request")
 	v.SetDefault("adapters.pulsepoint.endpoint", "http://bid.contextweb.com/header/s/ortb/prebid-s2s")
 	v.SetDefault("adapters.rhythmone.endpoint", "http://tag.1rx.io/rmp")
diff --git a/config/config_test.go b/config/config_test.go
index cd143c61a5c..24008980a86 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -27,7 +27,7 @@ func TestDefaults(t *testing.T) {
 	cmpInts(t, "host_cookie.ttl_days", int(cfg.HostCookie.TTL), 90)
 	cmpInts(t, "host_cookie.max_cookie_size_bytes", cfg.HostCookie.MaxCookieSizeBytes, 0)
 	cmpStrings(t, "datacache.type", cfg.DataCache.Type, "dummy")
-	cmpStrings(t, "adapters.pubmatic.endpoint", cfg.Adapters[string(openrtb_ext.BidderPubmatic)].Endpoint, "http://hbopenbid.pubmatic.com/translator?source=prebid-server")
+	cmpStrings(t, "adapters.pubmatic.endpoint", cfg.Adapters[string(openrtb_ext.BidderPubmatic)].Endpoint, "https://hbopenbid.pubmatic.com/translator?source=prebid-server")
 	cmpInts(t, "currency_converter.fetch_interval_seconds", cfg.CurrencyConverter.FetchIntervalSeconds, 1800)
 	cmpStrings(t, "currency_converter.fetch_url", cfg.CurrencyConverter.FetchURL, "https://cdn.jsdelivr.net/gh/prebid/currency-file@1/latest.json")
 	cmpBools(t, "account_required", cfg.AccountRequired, false)