diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
index 2b059b49..cb18f1c8 100755
--- a/main/Kconfig.projbuild
+++ b/main/Kconfig.projbuild
@@ -15,7 +15,7 @@ menu "Bitaxe Configuration"
 
     config ASIC_FREQUENCY
         int "ASIC Hash Frequency (MHz)"
-        range 200 800
+        range 50 800
         default 250
         help
             The BM1397 hash frequency
@@ -55,4 +55,4 @@ menu "Stratum Configuration"
         help
             A starting difficulty to use with the pool.
 
-endmenu
\ No newline at end of file
+endmenu