diff --git a/pippo-core/src/main/java/ro/pippo/core/Messages.java b/pippo-core/src/main/java/ro/pippo/core/Messages.java
index 8405dbfcf..b1b6d3b0c 100644
--- a/pippo-core/src/main/java/ro/pippo/core/Messages.java
+++ b/pippo-core/src/main/java/ro/pippo/core/Messages.java
@@ -339,14 +339,16 @@ private Map<String, Properties> loadRegisteredMessageResources(String name) {
      * Attempts to load a message resource.
      */
     private Properties loadMessages(String fileOrUrl) {
-        URL url = ClasspathUtils.locateOnClasspath(fileOrUrl);
-        if (url != null) {
-            try (InputStreamReader reader = new InputStreamReader(url.openStream(), StandardCharsets.UTF_8)) {
-                Properties messages = new Properties();
-                messages.load(reader);
-                return messages;
-            } catch (IOException e) {
-                log.error("Failed to load {}", fileOrUrl, e);
+        List<URL> urls = ClasspathUtils.getResources(fileOrUrl);
+        for (URL url: urls) {
+            if (url != null) {
+                try (InputStreamReader reader = new InputStreamReader(url.openStream(), StandardCharsets.UTF_8)) {
+                    Properties messages = new Properties();
+                    messages.load(reader);
+                    return messages;
+                } catch (IOException e) {
+                    log.error("Failed to load {}", fileOrUrl, e);
+                }
             }
         }
 
diff --git a/pippo-core/src/main/java/ro/pippo/core/util/WhitelistObjectInputStream.java b/pippo-core/src/main/java/ro/pippo/core/util/WhitelistObjectInputStream.java
index 6b05ef6dc..375fd16d0 100644
--- a/pippo-core/src/main/java/ro/pippo/core/util/WhitelistObjectInputStream.java
+++ b/pippo-core/src/main/java/ro/pippo/core/util/WhitelistObjectInputStream.java
@@ -33,6 +33,7 @@
 public class WhitelistObjectInputStream extends ObjectInputStream {
 
     private static List<String> whiteClassNames;
+    private static List<String> whitePackageNames;
 
     static {
         loadWhitelist(WhitelistObjectInputStream.class.getResourceAsStream(PippoConstants.LOCATION_OF_PIPPO_WHITELIST_SERIALIZATION));
@@ -44,7 +45,7 @@ public WhitelistObjectInputStream(InputStream in) throws IOException {
 
     protected Class<?> resolveClass(ObjectStreamClass descriptor) throws ClassNotFoundException, IOException {
         String className = descriptor.getName();
-        if (!isWhiteListed(className)) {
+        if ((!isWhiteListed(className)) && (!isWhiteListedPackageName(className))) {
             throw new InvalidClassException("Unauthorized deserialization attempt", className);
         }
 
@@ -61,6 +62,16 @@ private boolean isWhiteListed(String className) {
         return false;
     }
 
+    private boolean isWhiteListedPackageName(String className) {
+        for (String packageName : whitePackageNames) {
+            if (className.startsWith(packageName)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Load the whitelist from an {@link InputStream}.
      * The content of the {@code InputStream} is in format:
@@ -68,6 +79,9 @@ private boolean isWhiteListed(String className) {
      * # Java
      * java.util.ArrayList
      * java.util.HashMap
+     * # all class names in java.lang (please be aware of the trailing dot (.) aignalling that the whole package and
+     * # its sub-packages shall be whitelisted)
+     * java.lang.
      *
      * # Pippo
      * ro.pippo.session.DefaultSessionData
@@ -75,6 +89,7 @@ private boolean isWhiteListed(String className) {
      * }
      *
      * A line that starts with {@code #} is a comment and will be ignored.
+     * A line that ends with a dot (.) whitelists a complete package and its sub-packages.
      */
     private static void loadWhitelist(InputStream input) {
         String content;
@@ -91,6 +106,8 @@ private static void loadWhitelist(InputStream input) {
             if (line.startsWith("#")) {
                 // it's a comment; ignore line
                 continue;
+            } else if (line.endsWith(".")) {
+                addWhitePackageName(line);
             }
 
             addWhiteClassName(line);
@@ -101,4 +118,8 @@ private static void addWhiteClassName(String className) {
         whiteClassNames.add(className);
     }
 
+    private static void addWhitePackageName(String packageName) {
+        whitePackageNames.add(packageName);
+    }
+
 }