diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d51635e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sdks"]
+	path = sdks
+	url = https://github.com/martinpaljak/oracle_javacard_sdks
diff --git a/build.xml b/build.xml
index 83d6c0f..6d7d5d9 100644
--- a/build.xml
+++ b/build.xml
@@ -1,13 +1,18 @@
 <?xml version="1.0"?>
 <project name="smartpgp" default="convert" basedir=".">
-  <description>Ant build for SmartPGP applet</description>
-  <get src="https://github.com/martinpaljak/ant-javacard/releases/download/v20.03.25/ant-javacard.jar" dest="." skipexisting="true"/>
-  <taskdef name="javacard" classname="pro.javacard.ant.JavaCard" classpath="ant-javacard.jar"/>
-  <target name="convert">
-    <javacard>
-      <cap output="SmartPGPApplet.cap" sources="src" aid="d27600012401" version="1.0">
-        <applet class="fr.anssi.smartpgp.SmartPGPApplet" aid="d276000124010304AFAF000000000000"/>
-      </cap>
-    </javacard>
-  </target>
+    <description>Ant build for SmartPGP applet</description>
+
+    <!-- Add JC303 SDK for JCOP 3.0.1 -->
+    <property name="JC305" value="sdks/jc305u3_kit"/>
+
+    <get src="https://github.com/martinpaljak/ant-javacard/releases/download/v20.03.25/ant-javacard.jar" dest="." skipexisting="true"/>
+    <taskdef name="javacard" classname="pro.javacard.ant.JavaCard" classpath="ant-javacard.jar"/>
+
+    <target name="convert">
+        <javacard>
+            <cap jckit="${JC303}" output="SmartPGPApplet.cap" sources="src" aid="d27600012401" version="1.0">
+                <applet class="fr.anssi.smartpgp.SmartPGPApplet" aid="d276000124010304c0deedb522560000"/>
+            </cap>
+        </javacard>
+    </target>
 </project>
diff --git a/sdks b/sdks
new file mode 160000
index 0000000..e305a1a
--- /dev/null
+++ b/sdks
@@ -0,0 +1 @@
+Subproject commit e305a1a0b9bf6b9a8b0c91a9aad8d73537e7ff1b