diff --git a/requirements.txt b/requirements.txt
index ad3abf3d..53445856 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ bottle==0.12.8
 colorama==0.3.3
 pyserial==2.7
 requests==2.7.0
+SCons==2.3.0