diff --git a/docker-compose.yml b/docker-compose.yml
index ffb832d..a91bd3c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,7 +4,7 @@ services:
   link:
     image: cognio/link
     ports:
-    - 8080:8080
+    - "8080:8080"
     environment:
       - JWT_METHOD=HS256
       - JWT_KEY=QvSqOTKhsCjeV1iU9ABYTQMJwhvXWPnz
diff --git a/pkg/cgnolink/alias/entity.go b/pkg/cgnolink/alias/entity.go
new file mode 100644
index 0000000..c189933
--- /dev/null
+++ b/pkg/cgnolink/alias/entity.go
@@ -0,0 +1,11 @@
+package alias
+
+import "time"
+
+type Alias struct {
+	Id           string
+	LinkId       int64
+	CreationTime time.Time
+}
+
+type Aliases = []*Alias
diff --git a/pkg/cgnolink/link/entity.go b/pkg/cgnolink/link/entity.go
index 343743e..58ab314 100644
--- a/pkg/cgnolink/link/entity.go
+++ b/pkg/cgnolink/link/entity.go
@@ -6,7 +6,7 @@ import (
 )
 
 type Link struct {
-	Id           string
+	Id           int64
 	Name         string
 	RedirectURL  url.URL
 	Password     string