diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index fca6ed2d..ae07bc3c 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release History
 
+## v4.1.1 (2022-05-31)
+- fix: failed to build debugtalk.go without go.mod
+- fix: avoid to escape from html special characters like '&'
+
 ## v4.1.0 (2022-05-29)
 
 - feat: add `wiki` sub-command to open httprunner website
diff --git a/examples/demo-empty-project/proj.json b/examples/demo-empty-project/proj.json
index 4ce79550..5d124adb 100644
--- a/examples/demo-empty-project/proj.json
+++ b/examples/demo-empty-project/proj.json
@@ -1,5 +1,5 @@
 {
     "project_name": "demo-empty-project",
     "create_time": "2022-05-31T15:05:51.196187+08:00",
-    "hrp_version": "v4.1.0"
+    "hrp_version": "v4.1.1"
 }
\ No newline at end of file
diff --git a/examples/demo-with-go-plugin/proj.json b/examples/demo-with-go-plugin/proj.json
index 1dc616b6..be9dfdaf 100644
--- a/examples/demo-with-go-plugin/proj.json
+++ b/examples/demo-with-go-plugin/proj.json
@@ -1,5 +1,5 @@
 {
     "project_name": "demo-with-go-plugin",
     "create_time": "2022-05-31T15:05:49.894029+08:00",
-    "hrp_version": "v4.1.0"
+    "hrp_version": "v4.1.1"
 }
\ No newline at end of file
diff --git a/examples/demo-with-py-plugin/.debugtalk_gen.py b/examples/demo-with-py-plugin/.debugtalk_gen.py
index 1bc989f2..d3b72a66 100644
--- a/examples/demo-with-py-plugin/.debugtalk_gen.py
+++ b/examples/demo-with-py-plugin/.debugtalk_gen.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By hrp v4.1.0, DO NOT EDIT!
+# NOTE: Generated By hrp v4.1.1, DO NOT EDIT!
 
 import logging
 import time
diff --git a/examples/demo-with-py-plugin/proj.json b/examples/demo-with-py-plugin/proj.json
index c854eeb0..ccf2b5d5 100644
--- a/examples/demo-with-py-plugin/proj.json
+++ b/examples/demo-with-py-plugin/proj.json
@@ -1,5 +1,5 @@
 {
     "project_name": "demo-with-py-plugin",
     "create_time": "2022-05-31T15:05:50.036068+08:00",
-    "hrp_version": "v4.1.0"
+    "hrp_version": "v4.1.1"
 }
\ No newline at end of file
diff --git a/examples/demo-without-plugin/proj.json b/examples/demo-without-plugin/proj.json
index afe69717..7c95fdb6 100644
--- a/examples/demo-without-plugin/proj.json
+++ b/examples/demo-without-plugin/proj.json
@@ -1,5 +1,5 @@
 {
     "project_name": "demo-without-plugin",
     "create_time": "2022-05-31T15:05:51.066376+08:00",
-    "hrp_version": "v4.1.0"
+    "hrp_version": "v4.1.1"
 }
\ No newline at end of file
diff --git a/hrp/internal/builtin/utils.go b/hrp/internal/builtin/utils.go
index 09176168..8f3ca391 100644
--- a/hrp/internal/builtin/utils.go
+++ b/hrp/internal/builtin/utils.go
@@ -28,8 +28,19 @@ func Dump2JSON(data interface{}, path string) error {
 		return err
 	}
 	log.Info().Str("path", path).Msg("dump data to json")
-	file, _ := json.MarshalIndent(data, "", "    ")
-	err = os.WriteFile(path, file, 0o644)
+
+	// init json encoder
+	buffer := new(bytes.Buffer)
+	encoder := json.NewEncoder(buffer)
+	encoder.SetEscapeHTML(false)
+	encoder.SetIndent("", "    ")
+
+	err = encoder.Encode(data)
+	if err != nil {
+		return err
+	}
+
+	err = os.WriteFile(path, buffer.Bytes(), 0o644)
 	if err != nil {
 		log.Error().Err(err).Msg("dump json path failed")
 		return err
diff --git a/hrp/internal/convert/converter_har.go b/hrp/internal/convert/converter_har.go
index d35a9031..6ee9c156 100644
--- a/hrp/internal/convert/converter_har.go
+++ b/hrp/internal/convert/converter_har.go
@@ -587,11 +587,11 @@ func (s *stepFromHAR) makeRequestBody(entry *Entry) error {
 		s.Request.Body = body
 	} else if strings.HasPrefix(mimeType, "application/x-www-form-urlencoded") {
 		// post form
-		var paramsList []string
+		paramsMap := make(map[string]string)
 		for _, param := range entry.Request.PostData.Params {
-			paramsList = append(paramsList, fmt.Sprintf("%s=%s", param.Name, param.Value))
+			paramsMap[param.Name] = param.Value
 		}
-		s.Request.Body = strings.Join(paramsList, "&")
+		s.Request.Body = paramsMap
 	} else if strings.HasPrefix(mimeType, "text/plain") {
 		// post raw data
 		s.Request.Body = entry.Request.PostData.Text
diff --git a/hrp/internal/convert/converter_har_test.go b/hrp/internal/convert/converter_har_test.go
index 0d4daa11..af94c98c 100644
--- a/hrp/internal/convert/converter_har_test.go
+++ b/hrp/internal/convert/converter_har_test.go
@@ -118,7 +118,7 @@ func TestMakeTestCaseFromHAR(t *testing.T) {
 	if !assert.Equal(t, map[string]interface{}{"foo1": "HDnY8", "foo2": 12.3}, tCase.TestSteps[1].Request.Body) {
 		t.Fatal()
 	}
-	if !assert.Equal(t, "foo1=HDnY8&foo2=12.3", tCase.TestSteps[2].Request.Body) {
+	if !assert.Equal(t, map[string]string{"foo1": "HDnY8", "foo2": "12.3"}, tCase.TestSteps[2].Request.Body) {
 		t.Fatal()
 	}
 
@@ -264,7 +264,7 @@ func TestMakeRequestDataParams(t *testing.T) {
 		t.Fatal()
 	}
 
-	if !assert.Equal(t, "a=1&b=2", step.Request.Body) {
+	if !assert.Equal(t, map[string]string{"a": "1", "b": "2"}, step.Request.Body) {
 		t.Fatal()
 	}
 }
diff --git a/hrp/internal/json/json.go b/hrp/internal/json/json.go
index 859d1e28..640946e5 100644
--- a/hrp/internal/json/json.go
+++ b/hrp/internal/json/json.go
@@ -12,5 +12,6 @@ var (
 	MarshalIndent = json.MarshalIndent
 	Unmarshal     = json.Unmarshal
 	NewDecoder    = json.NewDecoder
+	NewEncoder    = json.NewEncoder
 	Get           = json.Get
 )
diff --git a/hrp/internal/scaffold/templates/plugin/.debugtalk_gen.py b/hrp/internal/scaffold/templates/plugin/.debugtalk_gen.py
index 1bc989f2..d3b72a66 100644
--- a/hrp/internal/scaffold/templates/plugin/.debugtalk_gen.py
+++ b/hrp/internal/scaffold/templates/plugin/.debugtalk_gen.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By hrp v4.1.0, DO NOT EDIT!
+# NOTE: Generated By hrp v4.1.1, DO NOT EDIT!
 
 import logging
 import time
diff --git a/hrp/internal/scaffold/templates/plugin/debugtalk_gen.go b/hrp/internal/scaffold/templates/plugin/debugtalk_gen.go
index ad875187..1def5aa4 100644
--- a/hrp/internal/scaffold/templates/plugin/debugtalk_gen.go
+++ b/hrp/internal/scaffold/templates/plugin/debugtalk_gen.go
@@ -1,4 +1,4 @@
-// NOTE: Generated By hrp v4.1.0, DO NOT EDIT!
+// NOTE: Generated By hrp v4.1.1, DO NOT EDIT!
 package main
 
 import (
@@ -12,5 +12,5 @@ func main() {
     fungo.Register("SetupHookExample", SetupHookExample)
     fungo.Register("TeardownHookExample", TeardownHookExample)
     fungo.Register("GetUserAgent", GetUserAgent)
-	fungo.Serve()
+    fungo.Serve()
 }
diff --git a/hrp/internal/version/VERSION b/hrp/internal/version/VERSION
index 5469c48c..4b23c7e2 100644
--- a/hrp/internal/version/VERSION
+++ b/hrp/internal/version/VERSION
@@ -1 +1 @@
-v4.1.0
\ No newline at end of file
+v4.1.1
\ No newline at end of file
diff --git a/hrp/internal/version/init.go b/hrp/internal/version/init.go
index 65b56ebc..836ffca7 100644
--- a/hrp/internal/version/init.go
+++ b/hrp/internal/version/init.go
@@ -7,4 +7,4 @@ import (
 //go:embed VERSION
 var VERSION string
 
-const HttpRunnerMinVersion = "v4.0.0-beta"
+const HttpRunnerMinVersion = "v4.1.0"
diff --git a/hrp/step_request.go b/hrp/step_request.go
index 39e15d74..28b174ce 100644
--- a/hrp/step_request.go
+++ b/hrp/step_request.go
@@ -145,7 +145,10 @@ func (r *requestBuilder) prepareUrlParams(stepVariables map[string]interface{})
 		log.Error().Err(err).Msg("parse request url failed")
 		return err
 	}
-	baseURL := stepVariables["base_url"].(string)
+	var baseURL string
+	if stepVariables["base_url"] != nil {
+		baseURL = stepVariables["base_url"].(string)
+	}
 	rawUrl := buildURL(baseURL, convertString(requestUrl))
 
 	// prepare request params
diff --git a/httprunner/__init__.py b/httprunner/__init__.py
index 562a9028..245ddbf5 100644
--- a/httprunner/__init__.py
+++ b/httprunner/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "v4.1.0"
+__version__ = "v4.1.1"
 __description__ = "One-stop solution for HTTP(S) testing."
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 9f56803d..b3f49e14 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "httprunner"
-version = "v4.1.0"
+version = "v4.1.1"
 description = "One-stop solution for HTTP(S) testing."
 license = "Apache-2.0"
 readme = "README.md"