diff --git a/cmd/xgo/version.go b/cmd/xgo/version.go
index 7e49a239..daead980 100644
--- a/cmd/xgo/version.go
+++ b/cmd/xgo/version.go
@@ -3,8 +3,8 @@ package main
 import "fmt"
 
 const VERSION = "1.0.15"
-const REVISION = "2861a46387df90bcadae7651dc6e0d2db8ab0148+1"
-const NUMBER = 152
+const REVISION = "6f59a908da45484b2104d51e2fa56d83d3bf65a5+1"
+const NUMBER = 153
 
 func getRevision() string {
 	return fmt.Sprintf("%s %s BUILD_%d", VERSION, REVISION, NUMBER)
diff --git a/patch/ctxt/ctx.go b/patch/ctxt/ctx.go
index f9ed3ea4..b3c1cf0e 100644
--- a/patch/ctxt/ctx.go
+++ b/patch/ctxt/ctx.go
@@ -50,7 +50,12 @@ var stdWhitelist = map[string]map[string]bool{
 	// },
 	"os": map[string]bool{
 		// starts with Get
-		"OpenFile": true,
+		"OpenFile":  true,
+		"ReadFile":  true,
+		"WriteFile": true,
+	},
+	"io/ioutil": map[string]bool{
+		"ReadAll": true,
 	},
 	"time": map[string]bool{
 		"Now": true,
diff --git a/runtime/core/version.go b/runtime/core/version.go
index 0334f3f2..5efd6c04 100644
--- a/runtime/core/version.go
+++ b/runtime/core/version.go
@@ -7,8 +7,8 @@ import (
 )
 
 const VERSION = "1.0.15"
-const REVISION = "2861a46387df90bcadae7651dc6e0d2db8ab0148+1"
-const NUMBER = 152
+const REVISION = "6f59a908da45484b2104d51e2fa56d83d3bf65a5+1"
+const NUMBER = 153
 
 // these fields will be filled by compiler
 const XGO_VERSION = ""
diff --git a/runtime/test/func_list/func_list_stdlib_test.go b/runtime/test/func_list/func_list_stdlib_test.go
index 0fadfde5..4c0f03b5 100644
--- a/runtime/test/func_list/func_list_stdlib_test.go
+++ b/runtime/test/func_list/func_list_stdlib_test.go
@@ -21,9 +21,14 @@ func TestListStdlib(t *testing.T) {
 
 	stdPkgs := map[string]bool{
 		// os
-		"os.Getenv":   true,
-		"os.Getwd":    true,
-		"os.OpenFile": true,
+		"os.Getenv":    true,
+		"os.Getwd":     true,
+		"os.OpenFile":  true,
+		"os.ReadFile":  true,
+		"os.WriteFile": true,
+
+		// io/ioutl
+		"io/ioutil.ReadAll": true,
 
 		// time
 		"time.Now":         true,