diff --git a/README.md b/README.md
index 56c2ed9..c33297c 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,57 @@ Library for building RSQL query strings for MongoDB in TypeScript and JavaScript
 $ npm install rsql-query-builder-mongodb
 ```
 
+## RSQL Builder for MongoDB Methods
+
+The `RSQLBuilderMongoDB` class provides many methods to build the desired RSQL string.
+
+### Initialization
+
+`constructor(options)` – Initializes a new `RSQLBuilderMongoDB` instance.
+
+### Comparisons Operators (Defining Conditions)
+
+`equal(selector, value)` - Appends a condition `selector == value`.
+`notEqual(selector, value)` - Appends a condition `selector != value`.
+`lessThan(selector, value)` - Appends a condition `selector =lt= value`.
+`lessThanOrEqual(selector, value)` - Appends a condition `selector =le= value`.
+`greaterThan(selector, value)` - Appends a condition `selector =gr= value`.
+`greaterThanOrEqual(selector, value)` - Appends a condition `selector =ge= value`.
+`in(selector, values)` - Appends a condition `selector =in= (values)`.
+`notIn(selector, value)` - Appends a condition `selector =out= (values)`.
+`like(selector, regex, options)` - Appends a condition `selector =regex= value = options`.
+`notLike(selector, regex, options)` - Appends a condition `selector =notregex= value = options`.
+`regex(selector, regex, options)` - Appends a condition `selector =regex= value = options`.
+`notRegex(selector, regex, options)` - Appends a condition `selector =notregex= value = options`.
+
+### Expression Grouping (Organizing Conditions)
+
+`group(builder)` - Wraps the conditions from another RSQLBuilderMongoDB instance in parentheses for grouping.
+
+### Logical Operators (Combining Conditions)
+
+`and()` – Appends the logical **AND** operator `;`.
+`or()` - Appends a logical **OR** operator `,`.
+
+### RSQL Builder Composition (Combining Multiple RSQL Queries)
+
+`concat(builder)` – Appends all expressions from another RSQLBuilderMongoDB instance to the current instance.
+`merge(builders)` – Merges multiple RSQLBuilderMongoDB instances into grouped conditions.
+
+### RSQL String Management (Finalizing the Query)
+
+`toString()` - Returns the generated RSQL query string.
+`isEmpty()` – Returns true if the RSQLBuilderMongoDB instance has no expressions; otherwise, returns false.
+`reset()` – Clears all expressions, resetting the RSQLBuilder instance.
+
+### Static Utilities
+
+`merge(builders)` – Creates a new RSQLBuilderMongoDB instance and merges multiple RSQLBuilderMongoDB instances into grouped conditions.
+
+## Compatibility
+
+This RSQLBuilder for MongoDB is built to be compatible to the following RSQL query resolver: [RSQL MongoDB](https://www.npmjs.com/package/rsql-mongodb)
+
 ## License
 
 [MIT](LICENSE)
diff --git a/package.json b/package.json
index 4a3d8d8..b01bc09 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "rsql-query-builder-mongodb",
-    "version": "1.3.0",
+    "version": "1.3.1",
     "description": "Library for building RSQL query strings for MongoDB.",
     "main": "dist/index.js",
     "module": "dist/index.mjs",