diff --git a/bson.java.gemspec b/bson.java.gemspec
index 27701bd..09bf578 100644
--- a/bson.java.gemspec
+++ b/bson.java.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.files  = ['LICENSE.txt']
   s.files += ['lib/bson.rb'] + Dir['lib/bson/**/*.rb']
   s.files += ['bin/b2json', 'bin/j2bson']
-  s.files += ["ext/java/jar/bson-2.2.jar", "ext/java/jar/jbson.jar", "ext/java/jar/mongo-2.2.jar"]
+  s.files += ["ext/java/jar/bson-2.2.jar", "ext/java/jar/jbson.jar", "ext/java/jar/mongo-2.4.jar"]
   s.test_files = Dir['test/bson/*.rb']
 
   s.executables = ['b2json', 'j2bson']
diff --git a/ext/java/jar/mongo-2.2.jar b/ext/java/jar/mongo-2.2.jar
deleted file mode 100644
index 80e2e25..0000000
Binary files a/ext/java/jar/mongo-2.2.jar and /dev/null differ
diff --git a/ext/java/jar/mongo-2.4.jar b/ext/java/jar/mongo-2.4.jar
new file mode 100644
index 0000000..d1e4322
Binary files /dev/null and b/ext/java/jar/mongo-2.4.jar differ
diff --git a/lib/bson.rb b/lib/bson.rb
index 661d172..2e30619 100644
--- a/lib/bson.rb
+++ b/lib/bson.rb
@@ -40,7 +40,7 @@ end
 
 if RUBY_PLATFORM =~ /java/
   jar_dir = File.join(File.dirname(__FILE__), '..', 'ext', 'java', 'jar')
-  require File.join(jar_dir, 'mongo-2.2.jar')
+  require File.join(jar_dir, 'mongo-2.4.jar')
   require File.join(jar_dir, 'bson-2.2.jar')
   require File.join(jar_dir, 'jbson.jar')
   require 'bson/bson_java'