diff --git a/include/db_lib/db_client.hpp b/include/db_lib/db_client.hpp
index 88f1933..132441c 100644
--- a/include/db_lib/db_client.hpp
+++ b/include/db_lib/db_client.hpp
@@ -44,12 +44,12 @@ class Connection {
     public:
 
     Connection(
-        db_credentials_t credentials,
+        db_credentials_t& credentials,
         std::function<void(pqxx::connection *c)> setup_function
     );
 
     Connection(
-        db_credentials_t credentials
+        db_credentials_t& credentials
     );
 
     ~Connection();
diff --git a/src/db_lib/db_client.cpp b/src/db_lib/db_client.cpp
index ca1c321..d014049 100644
--- a/src/db_lib/db_client.cpp
+++ b/src/db_lib/db_client.cpp
@@ -36,13 +36,13 @@ bool connected = false;
 
 
 Connection::Connection(
-    db_credentials_t credentials, 
+    db_credentials_t& credentials, 
     std::function<void(pqxx::connection *c)> setup
 ) : setup_function(move(setup)) {
     this->db_credentials = credentials;
 }
 
-Connection::Connection(db_credentials_t credentials) {
+Connection::Connection(db_credentials_t& credentials) {
     this->db_credentials = credentials;
 }