diff --git a/net/server/internal/api_getCardImage.go b/net/server/internal/api_getCardImage.go
index cfcd56d9..9a7895eb 100644
--- a/net/server/internal/api_getCardImage.go
+++ b/net/server/internal/api_getCardImage.go
@@ -1,6 +1,8 @@
 package databag
 
 import (
+  "time"
+  "bytes"
   "errors"
   "net/http"
   "gorm.io/gorm"
@@ -42,7 +44,7 @@ func GetCardProfileImage(w http.ResponseWriter, r *http.Request) {
     return
   }
 
-  w.Header().Set("Content-Type", http.DetectContentType(data))
-  w.Write(data);
+  // response with content
+  http.ServeContent(w, r, "image", time.Unix(slot.Card.Updated, 0), bytes.NewReader(data))
 }
 
diff --git a/net/server/internal/api_getChannelTopicAsset.go b/net/server/internal/api_getChannelTopicAsset.go
index 0c482c20..137201eb 100644
--- a/net/server/internal/api_getChannelTopicAsset.go
+++ b/net/server/internal/api_getChannelTopicAsset.go
@@ -10,8 +10,6 @@ import (
 
 func GetChannelTopicAsset(w http.ResponseWriter, r *http.Request) {
 
-PrintMsg(r)
-
   // scan parameters
   params := mux.Vars(r)
   topicId := params["topicId"]
diff --git a/net/server/internal/api_getProfileImage.go b/net/server/internal/api_getProfileImage.go
index da52f69b..41c80fad 100644
--- a/net/server/internal/api_getProfileImage.go
+++ b/net/server/internal/api_getProfileImage.go
@@ -1,6 +1,8 @@
 package databag
 
 import (
+  "time"
+  "bytes"
   "errors"
 	"net/http"
   "encoding/base64"
@@ -26,8 +28,8 @@ func GetProfileImage(w http.ResponseWriter, r *http.Request) {
     return
   }
 
-  w.Header().Set("Content-Type", http.DetectContentType(data))
-  w.Write(data);
+  // response with content
+  http.ServeContent(w, r, "image", time.Unix(account.Updated, 0), bytes.NewReader(data))
 }
 
 
diff --git a/net/server/internal/store/schema.go b/net/server/internal/store/schema.go
index e001448c..417f1d37 100644
--- a/net/server/internal/store/schema.go
+++ b/net/server/internal/store/schema.go
@@ -66,6 +66,7 @@ type Account struct {
   ChannelRevision   int64           `gorm:"not null;default:1"`
   CardRevision      int64           `gorm:"not null;default:1"`
   Created           int64           `gorm:"autoCreateTime"`
+  Updated           int64           `gorm:"autoUpdateTime"`
   Disabled          bool            `gorm:"not null;default:false"`
   AccountDetail     AccountDetail
   Apps              []App
diff --git a/net/server/internal/ucAttributeShare_test.go b/net/server/internal/ucAttributeShare_test.go
index 97f9e1cd..3443adc2 100644
--- a/net/server/internal/ucAttributeShare_test.go
+++ b/net/server/internal/ucAttributeShare_test.go
@@ -140,7 +140,7 @@ func TestAttributeShare(t *testing.T) {
   param["articleId"] = article.Id
   param["field"] = "nested.image"
   aData, aType, aErr := ApiTestData(GetArticleSubjectField, "GET", "/attributes/articles/{articleId}/subject/{field}",
-    &param, nil, APP_TOKENAPP, set.A.Token)
+    &param, nil, APP_TOKENAPP, set.A.Token, 0, 0)
   assert.NoError(t, aErr)
   assert.Equal(t, "image/png", aType["Content-Type"][0])
   img, _ = base64.StdEncoding.DecodeString(image)
@@ -150,7 +150,7 @@ func TestAttributeShare(t *testing.T) {
   param["articleId"] = article.Id
   param["field"] = "nested.image"
   cData, cType, cErr := ApiTestData(GetArticleSubjectField, "GET", "/attributes/articles/{articleId}/subject/{field}",
-    &param, nil, APP_TOKENCONTACT, set.C.A.Token)
+    &param, nil, APP_TOKENCONTACT, set.C.A.Token, 0, 0)
   assert.NoError(t, cErr)
   assert.Equal(t, "image/png", cType["Content-Type"][0])
   img, _ = base64.StdEncoding.DecodeString(image)
diff --git a/net/server/internal/ucContactSync_test.go b/net/server/internal/ucContactSync_test.go
index 7333938c..8e390b9e 100644
--- a/net/server/internal/ucContactSync_test.go
+++ b/net/server/internal/ucContactSync_test.go
@@ -41,7 +41,7 @@ func TestContactSync(t *testing.T) {
     &param, &msg, APP_TOKENAPP, set.B.Token, &card, nil))
   assert.True(t, card.Data.CardProfile.ImageSet)
   data, hdr, res = ApiTestData(GetCardProfileImage, "GET", "/contact/cards/{cardId}/profile/image",
-    &param, &data, APP_TOKENAPP, set.B.Token)
+    &param, &data, APP_TOKENAPP, set.B.Token, 0, 0)
   assert.NoError(t, res)
 
   // compare retrieved image
diff --git a/net/server/internal/ucProfileUpdate_test.go b/net/server/internal/ucProfileUpdate_test.go
index c7c4ab04..94c293eb 100644
--- a/net/server/internal/ucProfileUpdate_test.go
+++ b/net/server/internal/ucProfileUpdate_test.go
@@ -103,7 +103,7 @@ func TestProfileUpdate(t *testing.T) {
 
   // retrieve profile image
   data, hdr, err = ApiTestData(GetProfileImage, "GET", "/profile/image", nil, nil,
-    APP_TOKENAPP, set.A.Token)
+    APP_TOKENAPP, set.A.Token, 0, 0)
   assert.NoError(t, err)
 
   // compare retrieved image