diff --git a/templates/bluepill/platformio.ini b/templates/bluepill/platformio.ini
index f919710..ec46b20 100644
--- a/templates/bluepill/platformio.ini
+++ b/templates/bluepill/platformio.ini
@@ -3,7 +3,8 @@ platform = ststm32
 framework = arduino
 board = bluepill_f103c8_128k
 upload_protocol = jlink
-build_flags = -O2
+build_flags = -O2 -UDEBUG -DNDEBUG
     -D NUM_ANALOG_INPUTS=10
     -D NUM_ANALOG_FIRST=20
 build_unflags = -Os
+build_type = release
diff --git a/templates/esp32/platformio.ini b/templates/esp32/platformio.ini
index 230f337..d584bb6 100644
--- a/templates/esp32/platformio.ini
+++ b/templates/esp32/platformio.ini
@@ -2,5 +2,6 @@
 platform = espressif32
 framework = arduino
 board = esp32dev
-build_flags = -O2
+build_flags = -O2 -UDEBUG -DNDEBUG
 build_unflags = -Os
+build_type = release
diff --git a/templates/f7/Makefile b/templates/f7/Makefile
index de68547..a6d8fc9 100644
--- a/templates/f7/Makefile
+++ b/templates/f7/Makefile
@@ -107,7 +107,9 @@ C_DEFS =  \
 -DVDD_VALUE=3300 \
 -DPREFETCH_ENABLE=0 \
 -DART_ACCLERATOR_ENABLE=0 \
--DSTM32F746xx
+-DSTM32F746xx \
+-DNDEBUG \
+-UDEBUG
 
 
 # AS includes
diff --git a/templates/maixduino/platformio.ini b/templates/maixduino/platformio.ini
index d429a69..5722a7a 100644
--- a/templates/maixduino/platformio.ini
+++ b/templates/maixduino/platformio.ini
@@ -13,5 +13,6 @@ board_build.f_cpu = 600000000L
 upload_speed = 750000
 
 ; compiler optimizations to favour speed over size
-build_flags = -O3
+build_flags = -O3 -UDEBUG -DNDEBUG
 build_unflags = -Os
+build_type = release
diff --git a/templates/uno/platformio.ini b/templates/uno/platformio.ini
index f3633ce..be2f7cf 100644
--- a/templates/uno/platformio.ini
+++ b/templates/uno/platformio.ini
@@ -2,3 +2,5 @@
 platform = atmelavr
 framework = arduino
 board = uno
+build_flags = -Os -UDEBUG -DNDEBUG
+build_type = release