diff --git a/.gitignore b/.gitignore
index 6a30819..1246dc9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 /.gradle
 /.idea
+/.vscode
 /build
 /venv
+.env
 __pycache__
 /bin
\ No newline at end of file
diff --git a/README.md b/README.md
index b893383..b814e62 100644
--- a/README.md
+++ b/README.md
@@ -25,15 +25,19 @@ detailed requirements.
 You might be interested in [reading about the security model](docs/security_model.md).
 
 ## Environment Setup and Building the application
-1. **Download JavacardKit**: Obtain a copy of [JavacardKit version 3.0.4](https://www.oracle.com/java/technologies/javacard-sdk-downloads.html) (or jckit_303 if you prefer).
-2. **Set Environment Variable**: Configure the `JC_HOME` environment variable to point to your JavacardKit directory.
-   ```bash
-   export JC_HOME=<path_to_your_jckit_directory>
-   ```
 
-3. **Run Gradle Build**: Execute the following command to build the JavaCard application, which will produce a `.cap` file for installation.
+1. **Download Java Card Deveploment Kit**: Obtain a copy of Oracle's [Java Card Development Kit](https://www.oracle.com/java/technologies/javacard-downloads.html). As of February 2025, the latest version was 24.1. Unzip it and define a `JC_HOME` environment variable pointing it.
+
+2. **Verify you have a compatible Java Development Kit**: Gradle needs to use a JDK compatible with the Java Card Development Kit. As of February 2025, version 24.1 is compatible with JDK 8 to 17. Make sure your `JAVA_HOME` environment variable points to that JDK. If you are using Visual Studio Code, you can set the `java.import.gradle.java.home` setting in your workspace `settings.json` file to point to the JDK you want to use. For example:
+    ```json
+    {
+        "java.import.gradle.java.home": "/Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home"
+    }
+    ```
+
+3. **Run Gradle Build**: When you run a regular build task in Gradle, it will produce a `.cap` file for installation in the `/build/classes/javacard` directory. You can use the following command to build the application:
     ```bash
-   ./gradlew buildJavaCard
+   ./gradlew build
     ```
 
 
diff --git a/build.gradle b/build.gradle
index 5983cbb..bb8c56f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,20 +1,5 @@
-buildscript {
-    repositories {
-        mavenCentral()
-        maven { url "https://javacard.pro/maven" }
-    }
-}
-
-
 plugins {
     id("java")
-    id("com.klinec.gradle.javacard") version "1.8.0" apply false
-}
-
-var jcHomeSet = System.getenv("JC_HOME") != null
-if (!jcHomeSet) {
-    project.logger.warn("JC_HOME environment variable not set - doing a testing/fake build with jCardSim!")
-    project.logger.warn("YOU WILL NOT BE ABLE TO BUILD A JAVACARD APPLET THIS WAY")
 }
 
 group = "us.q3q"
@@ -24,19 +9,18 @@ repositories {
     mavenCentral()
 }
 
-dependencies {
-    if (jcHomeSet) {
-        testImplementation(group: 'com.klinec', name: 'jcardsim', version: '3.0.5.11') {
-            // Javacard will be provided by the user at runtime through the JC_HOME env var
-            exclude(group: 'oracle.javacard', module: 'api_classic')
-        }
-    } else {
-        // Perform a full-test build, since there's no javacard SDK
-        implementation(group: 'com.klinec', name: 'jcardsim', version: '3.0.5.11')
-    }
-    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.8.1'
+configurations {
+    jcdk
+}
 
-    testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.8.1'
+dependencies {
+    // JCDK dependencies for CAP generation
+    jcdk files("${System.getenv('JC_HOME')}/lib/api_classic-${JavaCardVersion}.jar")
+    
+    // Test dependencies use JCardSim
+    implementation 'com.klinec:jcardsim:3.0.6.0'
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.11.4'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }
 
 test {
@@ -56,20 +40,26 @@ tasks.register('testJar', Jar) {
     }
 }
 
-if (jcHomeSet) {
-    apply plugin: "com.klinec.gradle.javacard"
-    javacard {
-        config {
-            cap {
-                packageName 'us.q3q.fido2'
-                version '0.4'
-                aid PackageID
-                output 'FIDO2.cap'
-                applet {
-                    className 'us.q3q.fido2.FIDO2Applet'
-                    aid ApplicationID
-                }
-            }
-        }
-    }
+// Special task for compiling with JCDK API
+task classesCap(type: JavaCompile) {
+    source = sourceSets.main.java
+    classpath = configurations.jcdk
+    destinationDirectory = file("${buildDir}/classes/jcdk")
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
+}
+
+task(buildCap, type: JavaExec) {
+    mainClass = "com.sun.javacard.converter.Main"
+    classpath = files("${System.getenv('JC_HOME')}/lib/tools.jar")
+    args "-classdir", "${buildDir}/classes/jcdk",
+         "-applet", "${AppletAID}",
+         "${PackageName}.FIDO2Applet",
+         "-target", "${JavaCardVersion}",
+         "${PackageName}",
+         "${PackageAID}",
+         "${PackageVersion}"
 }
+
+buildCap.dependsOn classesCap
+build.dependsOn buildCap
diff --git a/gradle.properties b/gradle.properties
index de29a70..603b4d7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,5 @@
-PackageID=A000000647
-ApplicationID=A0000006472F0001
\ No newline at end of file
+PackageAID=0xA0:0x00:0x00:0x06:0x47:0x2F:0x00:0xFE
+PackageName=us.q3q.fido2
+PackageVersion=1.0
+AppletAID=0xA0:0x00:0x00:0x06:0x47:0x2F:0x00:0x01
+JavaCardVersion=3.0.4
diff --git a/requirements.txt b/requirements.txt
index 1fc253e..6b7ca3f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-fido2[pcsc]==1.1.2
-JPype1==1.5.0
+fido2[pcsc]==1.1.3
+JPype1==1.5.2
 parameterized==0.9.0
 uhid==0.0.1
diff --git a/settings.gradle b/settings.gradle
index ec89f1d..dde8319 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,2 +1 @@
 rootProject.name = "fido2applet"
-