diff --git a/README.md b/README.md
index fc15357..5d31bf7 100644
--- a/README.md
+++ b/README.md
@@ -54,18 +54,32 @@ docker run --rm -i aykhans/dodo -u https://example.com -m GET -d 10 -r 1000 -t 2
 
 ### 2. JSON config file
 You can find an example config structure in the [config.json](https://github.com/aykhans/dodo/blob/main/config.json) file:
-```json
+```jsonc
 {
     "method": "GET",
     "url": "https://example.com",
     "no_proxy_check": false,
-    "timeout": 2000,
-    "dodos": 10,
-    "requests": 1000,
-    "params": {},
-    "headers": {},
-    "cookies": {},
-    "body": [],
+    "timeout": 10000,
+    "dodos": 1,
+    "requests": 1,
+    "params": {
+        // Random param value will be selected from the param-key1 and param-key2 list for each request
+        "param-key1": ["param-value1", "param-value2", "param-value3"],
+        "param-key2": ["param-value1", "param-value2", "param-value3"]
+    },
+    "headers": {
+        // Random header value will be selected from the header-key1 and header-key2 list for each request
+        "header-key1": ["header-value1", "header-value2", "header-value3"],
+        "header-key2": ["header-value2", "header-value2", "header-value3"]
+    },
+    "cookies": {
+        // Random cookie value will be selected from the cookie-key1 and cookie-key2 list for each request
+        "cookie-key1": ["cookie-value1", "cookie-value2", "cookie-value3"],
+        "cookie-key2": ["cookie-value2", "cookie-value2", "cookie-value3"]
+    },
+    // Random body value will be selected from the body list for each request
+    "body": ["body1", "body2", "body3"],
+    // Random proxy will be selected from the proxy list for each request
     "proxies": [
         {
             "url": "http://example.com:8080",
diff --git a/config.json b/config.json
index 7e18d93..b94018a 100644
--- a/config.json
+++ b/config.json
@@ -5,10 +5,19 @@
     "timeout": 10000,
     "dodos": 1,
     "requests": 1,
-    "params": {},
-    "headers": {},
-    "cookies": {},
-    "body": [],
+    "params": {
+        "param-key1": ["param-value1", "param-value2", "param-value3"],
+        "param-key2": ["param-value1", "param-value2", "param-value3"]
+    },
+    "headers": {
+        "header-key1": ["header-value1", "header-value2", "header-value3"],
+        "header-key2": ["header-value2", "header-value2", "header-value3"]
+    },
+    "cookies": {
+        "cookie-key1": ["cookie-value1", "cookie-value2", "cookie-value3"],
+        "cookie-key2": ["cookie-value2", "cookie-value2", "cookie-value3"]
+    },
+    "body": ["body1", "body2", "body3"],
     "proxies": [
         {
             "url": "http://example.com:8080",