diff --git a/app/Makefile b/app/Makefile
index 39b4d0c4..1ffb0280 100755
--- a/app/Makefile
+++ b/app/Makefile
@@ -83,7 +83,7 @@ endif
 ifeq ($(TARGET_NAME),TARGET_NANOS)
 	APP_STACK_MIN_SIZE := 1600
 else
-	APP_STACK_MIN_SIZE := 1752
+	APP_STACK_MIN_SIZE := 1850
 endif
 
 include $(CURDIR)/../deps/ledger-zxlib/makefiles/Makefile.platform
diff --git a/app/src/common/tx.c b/app/src/common/tx.c
index 81d3fb8e..764c2f9b 100644
--- a/app/src/common/tx.c
+++ b/app/src/common/tx.c
@@ -25,7 +25,7 @@
 #define RAM_BUFFER_SIZE 8192
 #define FLASH_BUFFER_SIZE 16384
 #elif defined(TARGET_NANOX)
-#define RAM_BUFFER_SIZE 8158
+#define RAM_BUFFER_SIZE 7168
 #define FLASH_BUFFER_SIZE 16384
 #elif defined(TARGET_NANOS)
 #define RAM_BUFFER_SIZE 0
diff --git a/app/src/json/json_parser.h b/app/src/json/json_parser.h
index f4044543..d329f651 100644
--- a/app/src/json/json_parser.h
+++ b/app/src/json/json_parser.h
@@ -31,7 +31,7 @@ extern "C" {
 #endif
 
 /// Max number of accepted tokens in the JSON input
-#define MAX_NUMBER_OF_TOKENS   760
+#define MAX_NUMBER_OF_TOKENS   768
 
 // we must limit the number
 #if defined(TARGET_NANOS)