diff --git a/keymaps/default/rules.mk b/keymaps/default/rules.mk
index 6be6fff..8512b7d 100644
--- a/keymaps/default/rules.mk
+++ b/keymaps/default/rules.mk
@@ -1,6 +1,5 @@
 # Set any rules.mk overrides for your specific keymap here.
 # See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
-LTO_ENABLE = yes
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = no
 TAP_DANCE_ENABLE = yes
diff --git a/rules.mk b/rules.mk
index 96a02c9..dc83f2f 100644
--- a/rules.mk
+++ b/rules.mk
@@ -21,7 +21,7 @@ BOOTMAGIC_ENABLE = no   # Virtual DIP switch configuration
 MOUSEKEY_ENABLE  = no  # Mouse keys
 EXTRAKEY_ENABLE  = yes  # Audio control and System control
 CONSOLE_ENABLE   = no   # Console for debug
-COMMAND_ENABLE   = yes  # Commands for debug and configuration
+COMMAND_ENABLE   = no   # Commands for debug and configuration
 CUSTOM_MATRIX    = lite # Custom matrix file for the ErgoDox EZ
 NKRO_ENABLE      = yes  # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 UNICODE_ENABLE   = no  # Unicode
@@ -29,6 +29,10 @@ SWAP_HANDS_ENABLE= no  # Allow swapping hands of keyboard
 SLEEP_LED_ENABLE = no
 API_SYSEX_ENABLE = no
 
+# Disable some unused qmk features
+# to save space
+MAGIC_ENABLE = no
+
 DEBOUNCE_TYPE = eager_pr
 
 # project specific files
@@ -37,6 +41,10 @@ QUANTUM_LIB_SRC += i2c_master.c
 
 LAYOUTS = ergodox
 
+# Link-time optimization.
+# Significantly reduces firmware size.
+LTO_ENABLE = yes
+
 MOUSE_SHARED_EP = no
 
 # FROM glow dir