diff --git a/game/network/session.cpp b/game/network/session.cpp
index 91886d1..6bd360d 100644
--- a/game/network/session.cpp
+++ b/game/network/session.cpp
@@ -56,6 +56,8 @@ bool Session::parse(std::string s)
     } else if (s.size()>=3&&s[0]=='v'&&s[1]==' ') {
         //set speed
         double speed = atof(s.substr(2).c_str());
+        if(speed<0)speed=0;
+        if(speed>3)speed=3;
         m_state->setSpeed(m_pid, speed);
 
     } else if (token == "dev") {