diff --git a/main.go b/main.go
index 9172626..6ee659d 100644
--- a/main.go
+++ b/main.go
@@ -6,6 +6,7 @@ import (
 	"log"
 	"math/rand"
 	"net/http"
+	"os"
 	"time"
 )
 
@@ -14,7 +15,7 @@ const MAX = 12
 var addr = flag.String("addr", ":8000", "address I'll listen on.")
 var static_files = flag.String("static", "./static", "location of static files")
 
-var store = sessions.NewCookieStore([]byte("hello world"))
+var store = sessions.NewCookieStore([]byte(os.Getenv("MMG_SECRET_KEY")))
 
 func main() {
 	rand.Seed(time.Now().UTC().UnixNano())