diff --git a/firmware/rust/avr-specs/avr-atmega328p.json b/firmware/rust/avr-specs/avr-atmega328p.json
index e236b08..20752d1 100644
--- a/firmware/rust/avr-specs/avr-atmega328p.json
+++ b/firmware/rust/avr-specs/avr-atmega328p.json
@@ -8,7 +8,7 @@
   "executables": true,
   "late-link-args": {
     "gcc": [
-      "-lgcc"
+        "-lgcc"
     ]
   },
   "linker": "avr-gcc",
@@ -18,8 +18,10 @@
   "no-default-libraries": false,
   "pre-link-args": {
     "gcc": [
-      "-mmcu=atmega328p",
-      "-Wl,--as-needed"
+        "-mmcu=atmega328p",
+        "-Os",
+        "-mrelax",
+        "-flto"
     ]
   },
   "target-c-int-width": "16",