diff --git a/README.md b/README.md
index a299335..492c6e3 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,18 @@ go-curl
 
 [![Build Status](https://secure.travis-ci.org/andelf/go-curl.png?branch=master)](http://travis-ci.org/andelf/go-curl)
 
-my golang libcurl(curl) binding.
+go-curl is a GoLang interface to [libcurl](https://curl.haxx.se/libcurl/),
+the multiprotocol file transfer library. Similar to the HTTP
+support in [net/http] (https://pkg.go.dev/net/http), go-curl can be used to
+fetch objects from a Go program. While go-curl can provide simple fetches,
+it also exposes most of the functionality of libcurl, including:
 
-See more examples in ./examples/ directory~!
+ * Speed - libcurl is very fast.
+ * Multiple protocol (not just HTTP).
+ * SSL, authentication and proxy support.
+ * Support for libcurl's callbacks.
+
+This said, libcurl API can be less easy to learn than net/http.
 
 LICENSE
 -------
@@ -22,11 +31,15 @@ Current Development Status
  * partly implement share & multi interface
  * new callback function prototype
 
-How to Install
---------------
+Requirements
+------------
+ * Any version of Go
+ * libcurl 7.x or higher (including development headers and static/dynamic libs)
+ * Python 3 (used only by configure scripts)
 
-Make Sure You Have libcurl (and its develop headers, static/dynamic libs) installed!
 
+How to Install
+--------------
 
     $ go get -u github.com/andelf/go-curl
 
@@ -55,9 +68,9 @@ func main() {
     easy := curl.EasyInit()
     defer easy.Cleanup()
 
-    easy.Setopt(curl.OPT_URL, "http://www.baidu.com/")
+    easy.Setopt(curl.OPT_URL, "https://www.baidu.com/")
 
-    // make a callback function
+    // OPTIONAL - make a callback function
     fooTest := func (buf []byte, userdata interface{}) bool {
         println("DEBUG: size=>", len(buf))
         println("DEBUG: content=>", string(buf))
@@ -71,3 +84,5 @@ func main() {
     }
 }
 ```
+
+See also the [examples](./examples/) directory!
diff --git a/examples/https.go b/examples/https.go
index 0a4e031..a305c30 100644
--- a/examples/https.go
+++ b/examples/https.go
@@ -8,10 +8,7 @@ func main() {
 	easy := curl.EasyInit()
 	defer easy.Cleanup()
 	if easy != nil {
-		easy.Setopt(curl.OPT_URL, "https://mail.google.com/")
-		// skip_peer_verification
-		easy.Setopt(curl.OPT_SSL_VERIFYPEER, false) // 0 is ok
-
+		easy.Setopt(curl.OPT_URL, "https://baidu.com/")
 		easy.Perform()
 	}
 }
diff --git a/examples/https_callback.go b/examples/https_callback.go
new file mode 100644
index 0000000..5de5255
--- /dev/null
+++ b/examples/https_callback.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+    "fmt"
+    curl "github.com/andelf/go-curl"
+)
+
+func main() {
+    easy := curl.EasyInit()
+    defer easy.Cleanup()
+
+    easy.Setopt(curl.OPT_URL, "https://www.baidu.com/")
+
+    // OPTIONAL - make a callback function
+    fooTest := func (buf []byte, userdata interface{}) bool {
+        println("DEBUG: size=>", len(buf))
+        println("DEBUG: content=>", string(buf))
+        return true
+    }
+
+    easy.Setopt(curl.OPT_WRITEFUNCTION, fooTest)
+
+    if err := easy.Perform(); err != nil {
+        fmt.Printf("ERROR: %v\n", err)
+    }
+}
diff --git a/examples/https_skip_peer_verify.go b/examples/https_skip_peer_verify.go
new file mode 100644
index 0000000..d0aafdc
--- /dev/null
+++ b/examples/https_skip_peer_verify.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	curl "github.com/andelf/go-curl"
+)
+
+func main() {
+	easy := curl.EasyInit()
+	defer easy.Cleanup()
+	if easy != nil {
+		easy.Setopt(curl.OPT_URL, "https://mail.google.com/")
+
+		// OPT_SSL_VERIFYPEER determines whether curl verifies the authenticity of the peer's certificate.
+		// Do not disable OPT_SSL_VERIFYPEER unless you absolutely sure of the security implications.
+		// https://curl.se/libcurl/c/CURLOPT_SSL_VERIFYPEER.html
+		easy.Setopt(curl.OPT_SSL_VERIFYPEER, false) // 0 also means false
+
+		easy.Perform()
+	}
+}
diff --git a/examples/misc.go b/examples/misc.go
index d66d2b7..dd054c3 100644
--- a/examples/misc.go
+++ b/examples/misc.go
@@ -2,9 +2,10 @@ package main
 
 import (
 	"fmt"
-	curl "github.com/andelf/go-curl"
 	"os"
 	"reflect"
+
+	curl "github.com/andelf/go-curl"
 )
 
 const endl = "\n"
@@ -37,7 +38,7 @@ func main() {
 	}
 	//print("set url =>", ret.Setopt(curl.OPT_URL, "http://commondatastorage.googleapis.com/chromium-browser-continuous/Linux_x64/104547/chrome-linux.zip"), endl)
 
-	print("set user_agent =>", ret.Setopt(curl.OPT_USERAGENT, "go-curl v0.0.1") == nil, endl)
+	print("set user_agent =>", ret.Setopt(curl.OPT_USERAGENT, "github.com/andelf/go-curl v0.0.1") == nil, endl)
 	// add to DNS cache
 	print("set resolve =>", ret.Setopt(curl.OPT_RESOLVE, []string{"www.baidu.com:8000:127.0.0.1"}) == nil, endl)
 	// ret.EasyReset()  clean seted
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..004a461
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/andelf/go-curl
+
+go 1.21.5
diff --git a/misc/codegen.py b/misc/codegen.py
index 050f826..7ee8310 100644
--- a/misc/codegen.py
+++ b/misc/codegen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import os
diff --git a/misc/compatgen.py b/misc/compatgen.py
index 2646d4d..cb41359 100644
--- a/misc/compatgen.py
+++ b/misc/compatgen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import os
@@ -118,5 +118,5 @@ def version_symbol(ver):
 
 result.extend(result_tail)
 
-with open("./compat.h", 'w') as fp:
+with open("./compat.h", 'w', encoding='utf-8') as fp:
     fp.write('\n'.join(result))