diff --git a/build.gradle.kts b/build.gradle.kts
index d64e871c1..67a4e0225 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -15,6 +15,19 @@ plugins {
     id("org.jetbrains.kotlinx.kover") version "0.7.4"
 }
 
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+    }
+}
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+}
+
+
 // This is overridden by the maven release process
 group = "com.github.kwebio"
 
diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 7cb90e214..2edfb7249 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -20,7 +20,7 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-serialization:1.9.21")
 }
 
-val gradleJvmTarget = 11
+val gradleJvmTarget = 17
 
 kotlin {
     jvmToolchain {
diff --git a/src/test/kotlin/kweb/state/render/RenderTest.kt b/src/test/kotlin/kweb/state/render/RenderTest.kt
index 770209df9..999da2207 100755
--- a/src/test/kotlin/kweb/state/render/RenderTest.kt
+++ b/src/test/kotlin/kweb/state/render/RenderTest.kt
@@ -38,12 +38,12 @@ class RenderTest {
         //https://bonigarcia.github.io/selenium-jupiter/#generic-driver
         @Options
         var chromeOptions = ChromeOptions().apply {
-            setHeadless(true)
+            addArguments("-headless")
         }
 
         @Options
         var firefoxOptions = FirefoxOptions().apply {
-            setHeadless(true)
+            addArguments("-headless")
         }
     }