diff --git a/runtime/config.go b/runtime/config.go
index e2a716a68..9fae37a50 100644
--- a/runtime/config.go
+++ b/runtime/config.go
@@ -49,14 +49,15 @@ type Config struct {
 	MaxValueLength       int    `help:"the maximum size in characters for contact field values and run result values"`
 	SessionStorage       string `validate:"omitempty,session_storage"         help:"where to store session output (s3|db)"`
 
-	S3Endpoint       string `help:"the S3 endpoint we will write attachments to"`
-	S3Region         string `help:"the S3 region we will write attachments to"`
-	S3MediaBucket    string `help:"the S3 bucket we will write attachments to"`
-	S3MediaPrefix    string `help:"the prefix that will be added to attachment filenames"`
-	S3SessionBucket  string `help:"the S3 bucket we will write attachments to"`
-	S3SessionPrefix  string `help:"the prefix that will be added to attachment filenames"`
-	S3DisableSSL     bool   `help:"whether we disable SSL when accessing S3. Should always be set to False unless you're hosting an S3 compatible service within a secure internal network"`
-	S3ForcePathStyle bool   `help:"whether we force S3 path style. Should generally need to default to False unless you're hosting an S3 compatible service"`
+	S3Endpoint           string `help:"the S3 endpoint we will write attachments to"`
+	S3Region             string `help:"the S3 region we will write attachments to"`
+	S3MediaBucket        string `help:"the S3 bucket we will write attachments to"`
+	S3MediaPrefix        string `help:"the prefix that will be added to attachment filenames"`
+	S3MediaPrefixZendesk string `help:"the prefix that will be added to file attachment names for Zendesk tickets"`
+	S3SessionBucket      string `help:"the S3 bucket we will write attachments to"`
+	S3SessionPrefix      string `help:"the prefix that will be added to attachment filenames"`
+	S3DisableSSL         bool   `help:"whether we disable SSL when accessing S3. Should always be set to False unless you're hosting an S3 compatible service within a secure internal network"`
+	S3ForcePathStyle     bool   `help:"whether we force S3 path style. Should generally need to default to False unless you're hosting an S3 compatible service"`
 
 	AWSAccessKeyID     string `help:"the access key id to use when authenticating S3"`
 	AWSSecretAccessKey string `help:"the secret access key id to use when authenticating S3"`
diff --git a/services/tickets/zendesk/service.go b/services/tickets/zendesk/service.go
index d52c63bdc..0ec8420f8 100644
--- a/services/tickets/zendesk/service.go
+++ b/services/tickets/zendesk/service.go
@@ -318,7 +318,9 @@ func (s *service) convertAttachments(attachments []utils.Attachment) ([]string,
 		path := strings.TrimPrefix(u.Path, prefix)
 		path = strings.TrimPrefix(path, "/")
 
-		fileURLs[i] = "api/v2/file/" + path
+		domain := s.rtConfig.S3MediaPrefixZendesk
+
+		fileURLs[i] = "https://" + domain + "/api/v2/file/" + path
 	}
 	return fileURLs, nil
 }
diff --git a/services/tickets/zendesk/testdata/TestOpenAndForward_forward_message.snap b/services/tickets/zendesk/testdata/TestOpenAndForward_forward_message.snap
index a7bff213c..b527ce41a 100644
--- a/services/tickets/zendesk/testdata/TestOpenAndForward_forward_message.snap
+++ b/services/tickets/zendesk/testdata/TestOpenAndForward_forward_message.snap
@@ -6,4 +6,4 @@ Authorization: Bearer ****************
 Content-Type: application/json
 Accept-Encoding: gzip
 
-{"instance_push_id":"1234-abcd","request_id":"sesame:1570461700000000000","external_resources":[{"external_id":"ca5607f0-cba8-4c94-9cd5-c4fbc24aa767","message":"It's urgent","thread_id":"59d74b86-3e2f-4a93-aece-b05d2fdcde0c","created_at":"2019-10-07T15:21:39Z","author":{"external_id":"6393abc0-283d-4c9b-a1b3-641a035c34bf","name":"Cathy"},"allow_channelback":true,"file_urls":["api/v2/file/0123/attachment1.jpg"]}]}
\ No newline at end of file
+{"instance_push_id":"1234-abcd","request_id":"sesame:1570461700000000000","external_resources":[{"external_id":"ca5607f0-cba8-4c94-9cd5-c4fbc24aa767","message":"It's urgent","thread_id":"59d74b86-3e2f-4a93-aece-b05d2fdcde0c","created_at":"2019-10-07T15:21:39Z","author":{"external_id":"6393abc0-283d-4c9b-a1b3-641a035c34bf","name":"Cathy"},"allow_channelback":true,"file_urls":["https://flows.weni.ai/api/v2/file/0123/attachment1.jpg"]}]}
\ No newline at end of file