diff --git a/lib/tools/tools.go b/lib/tools/tools.go
index 7e5158b..96ad886 100644
--- a/lib/tools/tools.go
+++ b/lib/tools/tools.go
@@ -30,7 +30,12 @@ func BuildKey(username string) string {
 }
 
 func BuildElyUrl(route string) string {
-	return "http://ely.by" + route
+	prefix := "http://ely.by"
+	if !strings.HasPrefix(route, prefix) {
+		route = prefix + route
+	}
+
+	return route
 }
 
 func getCurrentHour() int64 {
diff --git a/lib/tools/tools_test.go b/lib/tools/tools_test.go
index bf7b7f1..cb6fd37 100644
--- a/lib/tools/tools_test.go
+++ b/lib/tools/tools_test.go
@@ -20,3 +20,13 @@ func TestBuildKey(t *testing.T) {
 		t.Error("Function shound convert string to lower case and concatenate it with usernmae:")
 	}
 }
+
+func TestBuildElyUrl(t *testing.T) {
+	if BuildElyUrl("/route") != "http://ely.by/route" {
+		t.Error("Function should add prefix to the provided relative url.")
+	}
+
+	if BuildElyUrl("http://ely.by/test/route") != "http://ely.by/test/route" {
+		t.Error("Function should do not add prefix to the provided prefixed url.")
+	}
+}