diff --git a/build.gradle.kts b/build.gradle.kts
index f643076..b2e40cd 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-    id("org.jetbrains.kotlin.js") version "1.5.20"
+    id("org.jetbrains.kotlin.js") version "1.6.0"
 }
 
 group = "fr.username404"
@@ -22,8 +22,11 @@ kotlin {
         moduleName = "Username404_Website"
         compilations.all {
             with(languageSettings) {
-                apiVersion = coreLibrariesVersion.substring(0..2)
-                languageVersion = (apiVersion!!.toDouble() + 0.1).toString()
+                val secondDot = coreLibrariesVersion.let { it.indexOf('.', startIndex = it.indexOf('.') + 1) }
+                apiVersion = coreLibrariesVersion.run {
+                    substring(0 until secondDot).also { println(it) }
+                }
+                languageVersion = apiVersion!!.substringBefore('.') + '.' + (apiVersion!!.substringAfter('.').toInt() + 1).toString()
                 progressiveMode = true
             }
             with(kotlinOptions) {
diff --git a/gradle.properties b/gradle.properties
index 59dae48..30c7813 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,4 +8,4 @@ org.gradle.unsafe.configuration-cache=on
 org.gradle.vfs.watch=true
 
 kotlinx-html_version=0.7.3
-ktor_version=1.6.0
\ No newline at end of file
+ktor_version=1.6.5
\ No newline at end of file