diff --git a/widgets/calendar.lua b/widgets/calendar.lua
index c9e265a..d0df17c 100644
--- a/widgets/calendar.lua
+++ b/widgets/calendar.lua
@@ -37,7 +37,7 @@ function calendar:show(t_out, inc_offset)
     local tims = t_out or 0
     local f, c_text
     local today = tonumber(os.date('%d'))
-    local init_t = '/usr/bin/cal | sed -r -e "s/(^| )( '
+    local init_t = '/usr/bin/cal --color=never | sed -r -e "s/(^| )( '
 
     if offs == 0
     then -- current month showing, today highlighted