diff --git a/changelog b/changelog
new file mode 100644
index 0000000..3ca98a1
--- /dev/null
+++ b/changelog
@@ -0,0 +1,8 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.1.0] - 29-09-2024
\ No newline at end of file
diff --git a/index.ts b/index.ts
index 9d699de..496ee9b 100644
--- a/index.ts
+++ b/index.ts
@@ -1,10 +1,15 @@
 import chalk from "chalk";
 import {DateTime} from "luxon";
 import _ from "lodash";
+import {config} from "dotenv";
+config();
+
+type ILevel = "debug" | "info" | "warn" | "error" | "fatal";
 
 class Logger {
     nameService: string | null = null;
     instanceLogger: Function = console.log;
+    level: ILevel = "info";
 
     constructor(nameService: string, instanceLogger?: Function){
         this.nameService = nameService.toUpperCase();
@@ -12,29 +17,55 @@ class Logger {
         if (!_.isNil(instanceLogger)){
             this.instanceLogger = instanceLogger;
         }
+
+        const level = (process.env.LOG_LEVEL).toLowerCase() as ILevel;
+        switch(level){
+            case "debug":
+            case "error":
+            case "info":
+            case "warn":
+            case "fatal":
+                this.level = level;
+                break;
+            default:
+                if(!_.isNil(level) && level !== "null" && level !== "undefined" && level !== ""){
+                    this.#baseLog("fatal", "Not exist current level:", `"${level}"`, "select one of this: [debug|error|info|warn|fatal]")
+                    process.exit(1);
+                }
+        }
     }
 
     debug(...args: Array<any>){
-        this.#baseLog("debug", ...args);
+        if(this.level === "debug"){
+            this.#baseLog("debug", ...args);
+        }
     }
 
     info(...args: Array<any>){
-        this.#baseLog("info", ...args);
+        if((["info", "debug"] as Array<ILevel>).includes(this.level)){
+            this.#baseLog("info", ...args);
+        }
     }
 
     warn(...args: Array<any>){
-        this.#baseLog("warning", ...args);
+        if((["info", "debug", "warn"] as Array<ILevel>).includes(this.level)){
+            this.#baseLog("warn", ...args);
+        }
     }
 
     error(...args: Array<any>){
-        this.#baseLog("error", ...args);
+        if((["info", "debug", "warn", "error"] as Array<ILevel>).includes(this.level)){
+            this.#baseLog("error", ...args);
+        }
     }
 
     fatal(...args: Array<any>){
-        this.#baseLog("fatal", ...args);
+        if((["info", "debug", "warn", "error", "fatal"] as Array<ILevel>).includes(this.level)){
+            this.#baseLog("fatal", ...args);
+        }
     }
 
-    #baseLog(type: "debug" | "info" | "warning" | "error" | "fatal", ...args: Array<any>){
+    #baseLog(type: ILevel, ...args: Array<any>){
         let message = `[${DateTime.now().toFormat("dd-MM-yyyy hh:mm:ssZZ")}] [${type.toUpperCase()}] [${this.nameService}]`;
         
         args = args.map((message) => {
@@ -52,7 +83,7 @@ class Logger {
             case "info":
                 message = chalk.blue(message, ...args);
                 break;
-            case "warning":
+            case "warn":
                 message = chalk.yellow(message, ...args);
                 break;
             case "error":
@@ -67,4 +98,8 @@ class Logger {
     }
 }
 
-export default Logger;
\ No newline at end of file
+export default Logger;
+
+export {
+    ILevel
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 6895bcd..e0642b6 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "typecheck": "tsc --noEmit",
     "eslint": "eslint",
     "eslint-fix": "eslint --fix",
-    "test_dev": "cd ./test && vitest",
+    "test-dev": "cd ./test && vitest",
     "test": "cd ./test && FORCE_COLOR=1 vitest run",
     "build": "tsc"
   },
@@ -22,6 +22,7 @@
     "@types/luxon": "^3.4.2",
     "@types/node": "^22.7.4",
     "chalk": "^5.3.0",
+    "dotenv": "^16.4.5",
     "eslint": "^9.11.1",
     "lodash": "^4.17.21",
     "luxon": "^3.5.0",
diff --git a/test/index.test.ts b/test/index.test.ts
index 9c4a379..65f88fe 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -1,58 +1,178 @@
-import Logger from "../index";
-import { describe, it, expect, assert } from "vitest";
-let output = "";
+import { describe, it, expect, assert, vi } from "vitest";
 
-function captureLog(message: any){
+import Logger, { ILevel } from "../index";
+import {alternateCase, listLevel} from "./utils/utils"
+
+let output: any = null;
+
+function captureLog(message: string){
+    //@ts-ignore
     output = JSON.stringify(message).replaceAll("\"", "");
 }
 
+process.env.LOG_LEVEL = "debug";
+
 describe("Test format", () => {
-    const logRegex = /\\u001b\[\d{1,3}m\[\d{2}-\d{2}-\d{4} \d{2}:\d{2}:\d{2}\+\d{2}:\d{2}\] \[(DEBUG|INFO|WARNING|ERROR|FATAL)\] \[TEST] .+?\\u001b\[\d{1,3}m/;
-    const logger = new Logger("test", captureLog);
-
-    it("check format debug", () => {
-        logger.debug("Hi!");
-        assert.match(output, logRegex, "Format isn't correct");
-    });
-    it("check format error", () => {
-
-        logger.error("Hi!");
-        assert.match(output, logRegex, "Format isn't correct");
-    });
-    it("check format fatal", () => {
-        logger.fatal("Hi!");
-        assert.match(output, logRegex, "Format isn't correct");
-    });
-    it("check format info", () => {
-        logger.info("Hi!");
-        assert.match(output, logRegex, "Format isn't correct");
-    });
-    it("check format warning", () => {
-        logger.warn("Hi!");
-        assert.match(output, logRegex, "Format isn't correct");
-    });
+    for (const objectLevel of listLevel) {
+        it(`check format ${objectLevel.level}`, () => {
+            output = null;
+            let logRegex = `\\\\u001b\\[\\d{1,3}m\\[\\d{2}-\\d{2}-\\d{4} \\d{2}:\\d{2}:\\d{2}\\+\\d{2}:\\d{2}\\] \\[${objectLevel.level.toUpperCase()}\\] \\[TEST] .+?\\\\u001b\\[\\d{1,3}m`;
+            
+            const logger = new Logger("test", captureLog);
+
+            logger[objectLevel.level]("Hi!");
+            
+            assert.match(output, new RegExp(logRegex), `Format isn't correct for level --> ${objectLevel.level}`);
+        });
+    }
 });
 
 describe("Test colors", () => {
-    const logger = new Logger("test", captureLog);
-    it("check color debug", () => {
-        logger.debug("Hi!");
-        expect(output.startsWith("\\u001b[90m") && output.endsWith("\\u001b[39m")).eq(true);
-    });
-    it("check color error", () => {
-        logger.error("Hi!");
-        expect(output.startsWith("\\u001b[31m") && output.endsWith("\\u001b[39m")).eq(true);
-    });
-    it("check color fatal", () => {
-        logger.fatal("Hi!");
-        expect(output.startsWith("\\u001b[91m") && output.endsWith("\\u001b[39m")).eq(true);
-    });
-    it("check color info", () => {
-        logger.info("Hi!");
-        expect(output.startsWith("\\u001b[34m") && output.endsWith("\\u001b[39m")).eq(true);
-    });
-    it("check color warning", () => {
-        logger.warn("Hi!");
-        expect(output.startsWith("\\u001b[33m") && output.endsWith("\\u001b[39m")).eq(true);
-    });
+    for (const objectLevel of listLevel) {
+        it(`check color ${objectLevel.level}`, () => {
+            output = null;
+
+            const logger = new Logger("test", captureLog);
+            logger[objectLevel.level]("Hi!");
+            expect(output.startsWith(objectLevel.color) && output.endsWith("\\u001b[39m")).eq(true);
+        });
+    }
+});
+
+describe("Test log level from ENV", () => {
+    it("Log level: (empty)", () => {
+        output = null;
+        process.env.LOG_LEVEL = "";
+        
+        const logger = new Logger("test", captureLog);
+        output = "";
+        logger.debug("Hi! custom");
+        
+        expect(output).empty
+    })
+    
+    it("Log level: null", () => {
+        output = null;
+        //@ts-ignore
+        process.env.LOG_LEVEL = null;
+        
+        const logger = new Logger("test", captureLog);
+        output = "";
+        logger.debug("Hi! custom");
+        
+        expect(output).empty
+    })
+    
+    it("Log level: undefined", () => {
+        output = null;
+        process.env.LOG_LEVEL = undefined;
+        
+        const logger = new Logger("test", captureLog);
+        output = "";
+        logger.debug("Hi! custom");
+        
+        expect(output).empty
+    })
+    
+    for (const objectLevel of listLevel) {
+        it(`Log level: ${objectLevel.level}`, () => {
+            output = null;
+            process.env.LOG_LEVEL = objectLevel.level;
+
+            const logger = new Logger("test", captureLog);
+            logger[objectLevel.level]("Hi!");
+            expect(output).not.null
+        });
+    }
+    
+    for (const objectLevel of listLevel) {
+        it(`Log level: ${objectLevel.level.toUpperCase()}`, () => {
+            output = null;
+            process.env.LOG_LEVEL = objectLevel.level.toUpperCase();
+
+            const logger = new Logger("test", captureLog);
+            logger[objectLevel.level]("Hi!");
+            expect(output).not.null
+        });
+    }
+    
+    for (const objectLevel of listLevel) {
+        it(`Log level: ${alternateCase(objectLevel.level)}`, () => {
+            output = null;
+            process.env.LOG_LEVEL = alternateCase(objectLevel.level);
+
+            const logger = new Logger("test", captureLog);
+            logger[objectLevel.level]("Hi!");
+            expect(output).not.null
+        });
+    }
+
+    it("Log level: debrn (not exist)", () => {
+        process.env.LOG_LEVEL = "debrn";
+        const exitCode = vi.spyOn(process, 'exit');
+
+        try{
+            new Logger("test", captureLog);
+        }catch{
+            //ignore
+        }
+
+        expect(exitCode).toHaveBeenCalledWith(1);
+    })
+
+    it("Log level: 1234 (not exist)", () => {
+        //@ts-ignore
+        process.env.LOG_LEVEL = 1234;
+        const exitCode = vi.spyOn(process, 'exit');
+
+        try{
+            new Logger("test", captureLog);
+        }catch{
+            //ignore
+        }
+
+        expect(exitCode).toHaveBeenCalledWith(1);
+    })
+})
+
+
+describe("Test print log level", () => {
+    for (const objectLevel of listLevel) {
+        it(`Log level: ${objectLevel.level}`, () => {
+            for (const singleLevel of listLevel.map((singleObjectlevel) => singleObjectlevel.level)) {
+                output = null;
+                process.env.LOG_LEVEL = singleLevel;
+
+                const logger = new Logger("test", captureLog);
+                logger[singleLevel]("Hi!");
+
+                if(objectLevel.level === "debug"){
+                    expect(output).not.null
+                    continue;
+                }
+                
+                if((["debug", "info"] as Array<ILevel>)){
+                    expect(output).not.null
+                    continue;
+                }
+                
+                if((["debug", "info", "warn"] as Array<ILevel>)){
+                    expect(output).not.null
+                    continue;
+                }
+                
+                if((["debug", "info", "error"] as Array<ILevel>)){
+                    expect(output).not.null
+                    continue;
+                }
+                
+                if((["debug", "info", "error", "fatal"] as Array<ILevel>)){
+                    expect(output).not.null
+                    continue;
+                }
+
+                expect(output).null;
+            }
+        });
+    }
 });
\ No newline at end of file
diff --git a/test/utils/utils.ts b/test/utils/utils.ts
new file mode 100644
index 0000000..0c2f382
--- /dev/null
+++ b/test/utils/utils.ts
@@ -0,0 +1,32 @@
+import { ILevel } from "../..";
+
+const listLevel: Array<{level: ILevel, color: string}> = [{
+    level: "debug",
+    color: "\\u001b[90m"
+},{
+    level: "error",
+    color: "\\u001b[31m"
+},{
+    level: "fatal",
+    color: "\\u001b[91m"
+},{
+    level: "info", 
+    color: "\\u001b[34m"
+},{
+    level: "warn",
+    color: "\\u001b[33m"
+}];
+
+function alternateCase(text: string){
+    return text
+        .split('')
+        .map((char, index) => 
+        index % 2 === 0 ? char.toLowerCase() : char.toUpperCase()
+        )
+        .join(''); 
+}
+
+export {
+    alternateCase,
+    listLevel
+}
\ No newline at end of file