diff --git a/src/dude.cpp b/src/dude.cpp
index d3aad47..94de427 100644
--- a/src/dude.cpp
+++ b/src/dude.cpp
@@ -2,7 +2,7 @@
 #include "map.h"
 #include <cstring>
 
-Dude::Dude(const Coord &_pos, Map *_map, int &_team) :
+Dude::Dude(const Coord &_pos, Map *_map, const int &_team) :
     m_pos(_pos),
     p_map(_map),
     m_team(_team),
diff --git a/src/dude.h b/src/dude.h
index d3cf802..8eaa6e7 100644
--- a/src/dude.h
+++ b/src/dude.h
@@ -20,7 +20,7 @@ private:
     int m_underResCount;
     
 public:
-    Dude(const Coord &_pos, Map *_map, int &_team);
+    Dude(const Coord &_pos, Map *_map, const int &_team);
     //general use functions
     void update(BehaviorFunction func);
     const Action& getAction() { return m_action; }
diff --git a/src/simulation.cpp b/src/simulation.cpp
index bc7b409..147194d 100644
--- a/src/simulation.cpp
+++ b/src/simulation.cpp
@@ -32,7 +32,7 @@ Simulation::~Simulation()
 void Simulation::update()
 {
     std::random_shuffle(m_dudes.begin(), m_dudes.end());
-    for (int i=0; i<m_dudes.size(); ++i){
+    for (unsigned int i=0; i<m_dudes.size(); ++i){
         Dude *dude = m_dudes[i];
         if (dude->isAlive()){
             m_teams[dude->getTeam()].update(dude); //get action for this dude from behavior function in team
@@ -43,7 +43,7 @@ void Simulation::update()
     resolveBattles();
 
     // for each team, spawn dude if condition met
-    for(int i=0; i<m_teams.size(); ++i){
+    for(unsigned int i=0; i<m_teams.size(); ++i){
         Team &t = m_teams[i];
         if(t.updateSpawn())
         {