diff --git a/src/main/java/javax0/license3j/RevocableLicense.java b/src/main/java/javax0/license3j/RevocableLicense.java
index a64e5d1..d452659 100644
--- a/src/main/java/javax0/license3j/RevocableLicense.java
+++ b/src/main/java/javax0/license3j/RevocableLicense.java
@@ -15,8 +15,8 @@
 public class RevocableLicense {
 
     final private static String REVOCATION_URL = "revocationUrl";
-    HttpHandler httpHandler = new HttpHandler();
     private final License license;
+    HttpHandler httpHandler = new HttpHandler();
 
     public RevocableLicense(License license) {
         this.license = license;
@@ -36,8 +36,10 @@ public RevocableLicense(License license) {
      * @throws MalformedURLException when the revocation url is not well formatted
      */
     public URL getRevocationURL() throws MalformedURLException {
-        final var revocationURLTemplate = license.get(REVOCATION_URL).getString();
-        final String revocationURL;
+        final Feature revocationURLFeature = license.get(REVOCATION_URL);
+        final var revocationURLTemplate = revocationURLFeature == null ?
+                null :
+                revocationURLFeature.getString();
         if (revocationURLTemplate != null) {
             final var id = Optional.ofNullable(license.getLicenseId()).orElse(license.fingerprint());
             if (id != null) {
@@ -50,6 +52,17 @@ public URL getRevocationURL() throws MalformedURLException {
         }
     }
 
+    /**
+     * Set the revocation URL. Using this method is discouraged in case the URL
+     * contains the <code>${licenseId}</code> place holder. In that case it is
+     * recommended to use the {@link #setRevocationURL(String)} method instead.
+     *
+     * @param url the revocation url
+     */
+    public void setRevocationURL(final URL url) {
+        setRevocationURL(url.toString());
+    }
+
     /**
      * Set the revocation URL. This method accepts the url as a string that
      * makes it possible to use a string that contains the
@@ -62,17 +75,6 @@ public void setRevocationURL(final String url) {
         license.add(Feature.Create.stringFeature(REVOCATION_URL, url));
     }
 
-    /**
-     * Set the revocation URL. Using this method is discouraged in case the URL
-     * contains the <code>${licenseId}</code> place holder. In that case it is
-     * recommended to use the {@link #setRevocationURL(String)} method instead.
-     *
-     * @param url the revocation url
-     */
-    public void setRevocationURL(final URL url) {
-        setRevocationURL(url.toString());
-    }
-
     /**
      * Check if the license was revoked or not. For more information see the
      * documentation of the method {@link #isRevoked(boolean)}. Calling this
diff --git a/src/test/java/javax0/license3j/LicenseTest.java b/src/test/java/javax0/license3j/LicenseTest.java
index cb93c85..d7eace5 100644
--- a/src/test/java/javax0/license3j/LicenseTest.java
+++ b/src/test/java/javax0/license3j/LicenseTest.java
@@ -44,14 +44,14 @@ public void licenseSerializeAndDeserialize() {
         Assertions.assertEquals("Peter Verhas", restored.get("owner").getString());
         Assertions.assertEquals(now, restored.get("expiry").getDate());
         Assertions.assertEquals("expiry:DATE=2018-12-17 12:55:19.295\n" +
-            "owner:STRING=Peter Verhas\n" +
-            "template:STRING=<<null\n" +
-            "<<special template>>\n" +
-            "null\n" +
-            "title:STRING=<<B\n" +
-            "A license test, \n" +
-            "test license\n" +
-            "B\n", sut.toString());
+                "owner=Peter Verhas\n" +
+                "template=<<null\n" +
+                "<<special template>>\n" +
+                "null\n" +
+                "title=<<B\n" +
+                "A license test, \n" +
+                "test license\n" +
+                "B\n", sut.toString());
     }
 
     @Test
@@ -65,14 +65,14 @@ public void licenseStringifyAndDestringify() {
         Assertions.assertEquals("Peter Verhas", restored.get("owner").getString());
         Assertions.assertEquals(now, restored.get("expiry").getDate());
         Assertions.assertEquals("expiry:DATE=2018-12-17 12:55:19.295\n" +
-            "owner:STRING=Peter Verhas\n" +
-            "template:STRING=<<null\n" +
-            "<<special template>>\n" +
-            "null\n" +
-            "title:STRING=<<B\n" +
-            "A license test, \n" +
-            "test license\n" +
-            "B\n", sut.toString());
+                "owner=Peter Verhas\n" +
+                "template=<<null\n" +
+                "<<special template>>\n" +
+                "null\n" +
+                "title=<<B\n" +
+                "A license test, \n" +
+                "test license\n" +
+                "B\n", sut.toString());
     }
 
     @Test