diff --git a/templates/blackpill/Makefile b/templates/blackpill/Makefile
index 3e2a8ee..b3d25e0 100644
--- a/templates/blackpill/Makefile
+++ b/templates/blackpill/Makefile
@@ -20,9 +20,9 @@ TARGET = blackpill
 # building variables
 ######################################
 # debug build?
-DEBUG = 1
+DEBUG = 0
 # optimization
-OPT = -Og
+OPT = -O2
 
 
 #######################################
diff --git a/templates/bluepill/src/main.ino b/templates/bluepill/src/main.ino
index b0ee00e..c3abda4 100644
--- a/templates/bluepill/src/main.ino
+++ b/templates/bluepill/src/main.ino
@@ -5,7 +5,7 @@
 #define MAX_BYTES 100
 
 //#define DEBUG
-#define CRYPTO_BUSY B11
+#define CRYPTO_BUSY A7
 
 uint8_t npub[CRYPTO_NPUBBYTES];
 uint8_t nsec[CRYPTO_NSECBYTES];