diff --git a/include/expresso/messages/request.h b/include/expresso/messages/request.h
index 211c619..4f394b2 100644
--- a/include/expresso/messages/request.h
+++ b/include/expresso/messages/request.h
@@ -28,7 +28,7 @@ class Request : public mochios::messages::Request {
 
   expresso::messages::Response *res;
 
-  void print() override;
+  const void print() const override;
 };
 
 } // namespace messages
diff --git a/include/expresso/messages/response.h b/include/expresso/messages/response.h
index d307712..fe2d9d0 100644
--- a/include/expresso/messages/response.h
+++ b/include/expresso/messages/response.h
@@ -50,7 +50,7 @@ class Response : public mochios::messages::Response {
   void sendInvalidRange();
 
   void end();
-  void print() override;
+  const void print() const override;
 };
 
 } // namespace messages
diff --git a/lib/brewtils b/lib/brewtils
index 076fd90..2793e24 160000
--- a/lib/brewtils
+++ b/lib/brewtils
@@ -1 +1 @@
-Subproject commit 076fd9068889dba633ccb26498d1baf74b4ccf4e
+Subproject commit 2793e2426bed03bd687a66eb1fbf896bed6676d5
diff --git a/lib/mochios b/lib/mochios
index 4fa51ea..62df53c 160000
--- a/lib/mochios
+++ b/lib/mochios
@@ -1 +1 @@
-Subproject commit 4fa51eab6a98d54ce0cc6006bb0030e89e66387c
+Subproject commit 62df53c7fb2b99de09e5dba5688261ce039bbf45
diff --git a/lib/zippuccino b/lib/zippuccino
index 5a2d20a..18d23a5 160000
--- a/lib/zippuccino
+++ b/lib/zippuccino
@@ -1 +1 @@
-Subproject commit 5a2d20af87800524ead200c048603c0ebd6c8542
+Subproject commit 18d23a59bb5d009079d7196d7ad25606e77a8e53
diff --git a/src/messages/request.cpp b/src/messages/request.cpp
index e4b9369..3d4822d 100644
--- a/src/messages/request.cpp
+++ b/src/messages/request.cpp
@@ -8,7 +8,7 @@ expresso::messages::Request::Request(const std::string &path)
 
 expresso::messages::Request::~Request() { return; }
 
-void expresso::messages::Request::print() {
+const void expresso::messages::Request::print() const {
   logger::info("Request: ");
 
   logger::info("  host: " + this->host);
diff --git a/src/messages/response.cpp b/src/messages/response.cpp
index aed379e..7b1fa76 100644
--- a/src/messages/response.cpp
+++ b/src/messages/response.cpp
@@ -210,7 +210,7 @@ void expresso::messages::Response::end() {
   return;
 }
 
-void expresso::messages::Response::print() {
+const void expresso::messages::Response::print() const {
   logger::info("Response: ");
   logger::info("  statusCode: " + std::to_string(this->statusCode));
   logger::info("  headers: ");