diff --git a/Software/reflowController/thermo.ino b/Software/reflowController/thermo.ino
index d7b7aaf..e70ac09 100644
--- a/Software/reflowController/thermo.ino
+++ b/Software/reflowController/thermo.ino
@@ -1,6 +1,6 @@
 #define MAXDO   7
-#define MAXCS   8
-#define MAXCLK  9
+#define MAXCS   6
+#define MAXCLK  8
 
 MAX6675 thermocouple(MAXCLK, MAXCS, MAXDO);