diff --git a/cmd/aicra/compile.go b/cmd/aicra/compile.go
index ba82330..0310a68 100644
--- a/cmd/aicra/compile.go
+++ b/cmd/aicra/compile.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"fmt"
-	"git.xdrm.io/go/aicra/clifmt"
+	"git.xdrm.io/go/aicra/internal/clifmt"
 	"os"
 	"os/exec"
 	"path/filepath"
diff --git a/cmd/aicra/main.go b/cmd/aicra/main.go
index 3abcba2..730f218 100644
--- a/cmd/aicra/main.go
+++ b/cmd/aicra/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	"flag"
 	"fmt"
-	"git.xdrm.io/go/aicra/clifmt"
+	"git.xdrm.io/go/aicra/internal/clifmt"
 	"os"
 	"path/filepath"
 	"time"
@@ -76,7 +76,7 @@ func main() {
 	}
 
 	// default types folder
-	dtPath := filepath.Join(os.Getenv("GOPATH"), "src/git.xdrm.io/go/aicra/checker/default")
+	dtPath := filepath.Join(os.Getenv("GOPATH"), "src/git.xdrm.io/go/aicra/internal/checker/default")
 
 	/* (3) Check path are existing dirs
 	---------------------------------------------------------*/
diff --git a/checker/default/any/main.go b/internal/checker/default/any/main.go
similarity index 100%
rename from checker/default/any/main.go
rename to internal/checker/default/any/main.go
diff --git a/checker/default/int/main.go b/internal/checker/default/int/main.go
similarity index 100%
rename from checker/default/int/main.go
rename to internal/checker/default/int/main.go
diff --git a/checker/default/string/main.go b/internal/checker/default/string/main.go
similarity index 100%
rename from checker/default/string/main.go
rename to internal/checker/default/string/main.go
diff --git a/checker/default/varchar/main.go b/internal/checker/default/varchar/main.go
similarity index 100%
rename from checker/default/varchar/main.go
rename to internal/checker/default/varchar/main.go
diff --git a/checker/public.go b/internal/checker/public.go
similarity index 100%
rename from checker/public.go
rename to internal/checker/public.go
diff --git a/checker/types.go b/internal/checker/types.go
similarity index 100%
rename from checker/types.go
rename to internal/checker/types.go
diff --git a/clifmt/colors.go b/internal/clifmt/colors.go
similarity index 100%
rename from clifmt/colors.go
rename to internal/clifmt/colors.go
diff --git a/clifmt/symbols.go b/internal/clifmt/symbols.go
similarity index 100%
rename from clifmt/symbols.go
rename to internal/clifmt/symbols.go
diff --git a/config/controller.go b/internal/config/controller.go
similarity index 100%
rename from config/controller.go
rename to internal/config/controller.go
diff --git a/config/method.go b/internal/config/method.go
similarity index 100%
rename from config/method.go
rename to internal/config/method.go
diff --git a/config/types.go b/internal/config/types.go
similarity index 100%
rename from config/types.go
rename to internal/config/types.go
diff --git a/multipart/private.go b/internal/multipart/private.go
similarity index 100%
rename from multipart/private.go
rename to internal/multipart/private.go
diff --git a/multipart/public.go b/internal/multipart/public.go
similarity index 100%
rename from multipart/public.go
rename to internal/multipart/public.go
diff --git a/multipart/types.go b/internal/multipart/types.go
similarity index 100%
rename from multipart/types.go
rename to internal/multipart/types.go
diff --git a/request/dataset.go b/internal/request/dataset.go
similarity index 98%
rename from request/dataset.go
rename to internal/request/dataset.go
index f67e28e..5a6a4af 100644
--- a/request/dataset.go
+++ b/internal/request/dataset.go
@@ -3,7 +3,7 @@ package request
 import (
 	"encoding/json"
 	"fmt"
-	"git.xdrm.io/go/aicra/multipart"
+	"git.xdrm.io/go/aicra/internal/multipart"
 	"log"
 	"net/http"
 	"strings"
diff --git a/request/parameter.go b/internal/request/parameter.go
similarity index 100%
rename from request/parameter.go
rename to internal/request/parameter.go
diff --git a/request/request.go b/internal/request/request.go
similarity index 100%
rename from request/request.go
rename to internal/request/request.go
diff --git a/request/types.go b/internal/request/types.go
similarity index 100%
rename from request/types.go
rename to internal/request/types.go
diff --git a/request/utils.go b/internal/request/utils.go
similarity index 100%
rename from request/utils.go
rename to internal/request/utils.go
diff --git a/server.go b/server.go
index 9c0d5cc..2d98e2f 100644
--- a/server.go
+++ b/server.go
@@ -2,12 +2,12 @@ package aicra
 
 import (
 	"fmt"
-	"git.xdrm.io/go/aicra/checker"
-	"git.xdrm.io/go/aicra/config"
 	e "git.xdrm.io/go/aicra/err"
 	"git.xdrm.io/go/aicra/implement"
+	"git.xdrm.io/go/aicra/internal/checker"
+	"git.xdrm.io/go/aicra/internal/config"
+	"git.xdrm.io/go/aicra/internal/request"
 	"git.xdrm.io/go/aicra/middleware"
-	"git.xdrm.io/go/aicra/request"
 	"log"
 	"net/http"
 )
diff --git a/types.go b/types.go
index 429736e..5d05943 100644
--- a/types.go
+++ b/types.go
@@ -1,8 +1,8 @@
 package aicra
 
 import (
-	"git.xdrm.io/go/aicra/checker"
-	"git.xdrm.io/go/aicra/config"
+	"git.xdrm.io/go/aicra/internal/checker"
+	"git.xdrm.io/go/aicra/internal/config"
 	"git.xdrm.io/go/aicra/middleware"
 )
 
diff --git a/util.go b/util.go
index 39b7809..d6c1271 100644
--- a/util.go
+++ b/util.go
@@ -2,10 +2,10 @@ package aicra
 
 import (
 	"encoding/json"
-	"git.xdrm.io/go/aicra/config"
 	"git.xdrm.io/go/aicra/err"
 	"git.xdrm.io/go/aicra/implement"
-	"git.xdrm.io/go/aicra/request"
+	"git.xdrm.io/go/aicra/internal/config"
+	"git.xdrm.io/go/aicra/internal/request"
 	"log"
 	"net/http"
 )