diff --git a/README.md b/README.md
index d835973..8a5b51b 100644
--- a/README.md
+++ b/README.md
@@ -19,4 +19,5 @@ services:
       - IDRAC_USER=root # set to your IPMI username
       - IDRAC_PW=calvin # set to your IPMI password
       - FANSPEED=0x05 # set to the hex value you want to set the fans to (from 0 to 100)
+      - MAXTEMP=32 # set the maximum temperature (in celcius) before dynamic fan control kicks back in, optional, defaults to 32
 ```