diff --git a/lib/nats/io/jetstream.rb b/lib/nats/io/jetstream.rb
index 10e051f..91c4c69 100644
--- a/lib/nats/io/jetstream.rb
+++ b/lib/nats/io/jetstream.rb
@@ -13,9 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-require_relative "msg"
-require_relative "client"
-require_relative "errors"
 require_relative "kv"
 require_relative "jetstream/api"
 require_relative "jetstream/errors"
diff --git a/lib/nats/io/jetstream/msg.rb b/lib/nats/io/jetstream/msg.rb
index bd5748d..a34e559 100644
--- a/lib/nats/io/jetstream/msg.rb
+++ b/lib/nats/io/jetstream/msg.rb
@@ -25,4 +25,9 @@ class JetStream
     module Msg
     end
   end
+
+  class Msg
+    # Enhance it with ack related methods from JetStream to ack msgs.
+    include JetStream::Msg::AckMethods
+  end
 end
diff --git a/lib/nats/io/msg.rb b/lib/nats/io/msg.rb
index 5324347..a62fd5f 100644
--- a/lib/nats/io/msg.rb
+++ b/lib/nats/io/msg.rb
@@ -12,16 +12,11 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-#
-require_relative "jetstream"
 
 module NATS
   class Msg
     attr_accessor :subject, :reply, :data, :header
 
-    # Enhance it with ack related methods from JetStream to ack msgs.
-    include JetStream::Msg::AckMethods
-
     def initialize(opts = {})
       @subject = opts[:subject]
       @reply = opts[:reply]