diff --git a/build.gradle.kts b/build.gradle.kts
index 59ae807..5313a86 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -106,7 +106,7 @@ dependencies {
         exclude(group = "org.codehaus.groovy")
     }
     functionalTestImplementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0")
-    functionalTestImplementation("org.jetbrains.kotlinx:kotlinx-cli:0.3.6")
+    functionalTestImplementation("com.github.ajalt.clikt:clikt:4.2.1")
 }
 
 publishing {
diff --git a/src/functionalTest/kotlin/io/github/platan/tests_execution_chart/JsonToHtmlReportApp.kt b/src/functionalTest/kotlin/io/github/platan/tests_execution_chart/JsonToHtmlReportApp.kt
index 2014414..e4c108e 100644
--- a/src/functionalTest/kotlin/io/github/platan/tests_execution_chart/JsonToHtmlReportApp.kt
+++ b/src/functionalTest/kotlin/io/github/platan/tests_execution_chart/JsonToHtmlReportApp.kt
@@ -2,15 +2,17 @@
 
 package io.github.platan.tests_execution_chart
 
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.options.default
+import com.github.ajalt.clikt.parameters.options.option
+import com.github.ajalt.clikt.parameters.options.required
+import com.github.ajalt.clikt.parameters.types.boolean
+import com.github.ajalt.clikt.parameters.types.int
 import io.github.platan.tests_execution_chart.report.ReportConfig
 import io.github.platan.tests_execution_chart.report.ReportCreator
 import io.github.platan.tests_execution_chart.report.data.TestExecutionScheduleReport
 import io.github.platan.tests_execution_chart.reporters.Logger
 import io.github.platan.tests_execution_chart.reporters.html.HtmlConfig
-import kotlinx.cli.ArgParser
-import kotlinx.cli.ArgType
-import kotlinx.cli.default
-import kotlinx.cli.required
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.decodeFromStream
@@ -25,35 +27,38 @@ private val logger = object : Logger {
     }
 }
 
+private class CommandLineParser : CliktCommand() {
+    val input by option(envvar = "input", help = "Input file in JSON format").required()
+    val outputDir by option(envvar = "output-dir").required()
+    val mermaidScriptSrc by option(envvar = "mermaid-script-src").default(HtmlConfig.Script.getSrcDefault())
+    val embed by option(envvar = "embed-mermaid-script").boolean().default(false)
+    val maxTextSize by option(envvar = "mermaid-max-text-size").int().default(50_000)
+    val taskName by option(envvar = "task-name").default("test")
+
+    override fun run() = Unit
+}
+
 @OptIn(ExperimentalSerializationApi::class)
 fun main(args: Array<String>) {
-    val parser = ArgParser("jsonToHtml")
-    val input by parser.option(ArgType.String, fullName = "input", description = "Input file in JSON format").required()
-    val outputDir by parser.option(ArgType.String, fullName = "output-dir").required()
-    val mermaidScriptSrc by parser.option(ArgType.String, fullName = "mermaid-script-src")
-        .default(HtmlConfig.Script.getSrcDefault())
-    val embed by parser.option(ArgType.Boolean, fullName = "embed-mermaid-script").default(false)
-    val maxTextSize by parser.option(ArgType.Int, fullName = "mermaid-max-text-size").default(50_000)
-    val taskName by parser.option(ArgType.String, fullName = "task-name").default("test")
-
-    parser.parse(args)
+    val commandLineParser = CommandLineParser()
+    commandLineParser.main(args)
 
     val outputLocation = "html-report"
-    val report = json.decodeFromStream<TestExecutionScheduleReport>(FileInputStream(input))
+    val report = json.decodeFromStream<TestExecutionScheduleReport>(FileInputStream(commandLineParser.input))
     val reportConfig = ReportConfig(
         listOf(
             HtmlConfig(
                 true,
                 outputLocation,
                 HtmlConfig.Script(
-                    mermaidScriptSrc,
-                    embed,
-                    HtmlConfig.Script.Options(maxTextSize)
+                    commandLineParser.mermaidScriptSrc,
+                    commandLineParser.embed,
+                    HtmlConfig.Script.Options(commandLineParser.maxTextSize)
                 )
             ),
         ),
         ReportConfig.Marks(),
         false,
     )
-    ReportCreator(logger).createReports(report, reportConfig, File(outputDir), taskName)
+    ReportCreator(logger).createReports(report, reportConfig, File(commandLineParser.outputDir), commandLineParser.taskName)
 }