diff --git a/backend/app/rest/api/rest_private_test.go b/backend/app/rest/api/rest_private_test.go
index d0a052f0..029dab01 100644
--- a/backend/app/rest/api/rest_private_test.go
+++ b/backend/app/rest/api/rest_private_test.go
@@ -425,7 +425,8 @@ func TestRest_Vote(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, 1, cr.Score)
 	assert.Equal(t, 1, cr.Vote)
-	assert.Equal(t, map[string]bool(nil), cr.Votes)
+	assert.Equal(t, map[string]bool(nil), cr.Votes, "hidden")
+	assert.Equal(t, map[string]store.VotedIPInfo(nil), cr.VotedIPs, "hidden")
 
 	assert.Equal(t, 200, vote(-1), "opposite vote allowed")
 	body, code = getWithDevAuth(t, fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1))
@@ -461,7 +462,8 @@ func TestRest_Vote(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, -1, cr.Score)
 	assert.Equal(t, 0, cr.Vote, "no vote info for not authed user")
-	assert.Equal(t, map[string]bool(nil), cr.Votes)
+	assert.Equal(t, map[string]bool(nil), cr.Votes, "hidden")
+	assert.Equal(t, map[string]store.VotedIPInfo(nil), cr.VotedIPs, "hidden")
 
 	req, err := http.NewRequest("GET",
 		fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1), nil)
@@ -474,7 +476,8 @@ func TestRest_Vote(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, -1, cr.Score)
 	assert.Equal(t, 0, cr.Vote, "no vote info for different user")
-	assert.Equal(t, map[string]bool(nil), cr.Votes)
+	assert.Equal(t, map[string]bool(nil), cr.Votes, "hidden")
+	assert.Equal(t, map[string]store.VotedIPInfo(nil), cr.VotedIPs, "hidden")
 }
 
 func TestRest_AnonVote(t *testing.T) {
diff --git a/backend/app/store/comment.go b/backend/app/store/comment.go
index b2c902dd..ba4e008f 100644
--- a/backend/app/store/comment.go
+++ b/backend/app/store/comment.go
@@ -83,6 +83,7 @@ func (c *Comment) PrepareUntrusted() {
 	c.ID = ""                 // don't allow user to define ID, force auto-gen
 	c.Timestamp = time.Time{} // reset time, force auto-gen
 	c.Votes = make(map[string]bool)
+	c.VotedIPs = make(map[string]VotedIPInfo)
 	c.Score = 0
 	c.Edit = nil
 	c.Pin = false
@@ -95,6 +96,7 @@ func (c *Comment) SetDeleted(mode DeleteMode) {
 	c.Orig = ""
 	c.Score = 0
 	c.Votes = map[string]bool{}
+	c.VotedIPs = make(map[string]VotedIPInfo)
 	c.Edit = nil
 	c.Deleted = true
 	c.Pin = false
diff --git a/backend/app/store/service/service.go b/backend/app/store/service/service.go
index a16c5201..2c3ed8b5 100644
--- a/backend/app/store/service/service.go
+++ b/backend/app/store/service/service.go
@@ -940,7 +940,8 @@ func (s *DataStore) prepVotes(c store.Comment, user store.User) store.Comment {
 		}
 	}
 
-	c.Votes = nil // hide voters list
+	c.Votes = nil    // hide voters list
+	c.VotedIPs = nil // hide voted ips (hashes)
 	return c
 }
 
diff --git a/backend/app/store/service/service_test.go b/backend/app/store/service/service_test.go
index 894dc546..982ea017 100644
--- a/backend/app/store/service/service_test.go
+++ b/backend/app/store/service/service_test.go
@@ -387,7 +387,7 @@ func TestService_VoteAggressive(t *testing.T) {
 
 	// random +1/-1 result should be [0..2]
 	rand.Seed(time.Now().UnixNano())
-	for i := 0; i < 1000; i++ {
+	for i := 0; i < 100; i++ {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()