diff --git a/ports/atmel-samd/boards/circuitplayground_express/mpconfigboard.h b/ports/atmel-samd/boards/circuitplayground_express/mpconfigboard.h
index 6eb49b02c5..1d4fc9893c 100644
--- a/ports/atmel-samd/boards/circuitplayground_express/mpconfigboard.h
+++ b/ports/atmel-samd/boards/circuitplayground_express/mpconfigboard.h
@@ -28,7 +28,7 @@
 #define BOARD_USER_SAFE_MODE_ACTION "pressing both buttons at start up"
 
 // Increase stack size slightly due to CPX library import nesting
-#define CIRCUITPY_DEFAULT_STACK_SIZE  (4504)
+#define CIRCUITPY_DEFAULT_STACK_SIZE  (4760) //divisible by 8
 
 #define DEFAULT_I2C_BUS_SCL (&pin_PB03)
 #define DEFAULT_I2C_BUS_SDA (&pin_PB02)
diff --git a/ports/atmel-samd/boards/circuitplayground_express_crickit/mpconfigboard.h b/ports/atmel-samd/boards/circuitplayground_express_crickit/mpconfigboard.h
index e64997c0e4..1e657bb034 100644
--- a/ports/atmel-samd/boards/circuitplayground_express_crickit/mpconfigboard.h
+++ b/ports/atmel-samd/boards/circuitplayground_express_crickit/mpconfigboard.h
@@ -28,7 +28,7 @@
 #define BOARD_USER_SAFE_MODE_ACTION "pressing both buttons at start up"
 
 // Increase stack size slightly due to CPX library import nesting
-#define CIRCUITPY_DEFAULT_STACK_SIZE  (4504)
+#define CIRCUITPY_DEFAULT_STACK_SIZE  (4760) // divisible by 8
 
 #define DEFAULT_I2C_BUS_SCL (&pin_PB03)
 #define DEFAULT_I2C_BUS_SDA (&pin_PB02)
diff --git a/ports/atmel-samd/boards/circuitplayground_express_displayio/mpconfigboard.h b/ports/atmel-samd/boards/circuitplayground_express_displayio/mpconfigboard.h
index c9a7ce0405..5dbcf61aa3 100644
--- a/ports/atmel-samd/boards/circuitplayground_express_displayio/mpconfigboard.h
+++ b/ports/atmel-samd/boards/circuitplayground_express_displayio/mpconfigboard.h
@@ -28,7 +28,7 @@
 #define BOARD_USER_SAFE_MODE_ACTION "pressing both buttons at start up"
 
 // Increase stack size slightly due to CPX library import nesting.
-#define CIRCUITPY_DEFAULT_STACK_SIZE  (4504)  // divisible by 8
+#define CIRCUITPY_DEFAULT_STACK_SIZE  (4760)  // divisible by 8
 
 #define DEFAULT_I2C_BUS_SCL (&pin_PB03)
 #define DEFAULT_I2C_BUS_SDA (&pin_PB02)