diff --git a/hal/src/fsfw_hal/common/gpio/gpioDefinitions.h b/hal/src/fsfw_hal/common/gpio/gpioDefinitions.h
index 0ef5b2ea..ae092fe9 100644
--- a/hal/src/fsfw_hal/common/gpio/gpioDefinitions.h
+++ b/hal/src/fsfw_hal/common/gpio/gpioDefinitions.h
@@ -9,11 +9,11 @@ using gpioId_t = uint16_t;
 
 namespace gpio {
 
-enum Levels : uint8_t { LOW = 0, HIGH = 1, NONE = 99 };
+enum class Levels : uint8_t { LOW = 0, HIGH = 1, NONE = 99 };
 
-enum Direction : uint8_t { DIR_IN = 0, DIR_OUT = 1 };
+enum class Direction : uint8_t { DIR_IN = 0, DIR_OUT = 1 };
 
-enum GpioOperation { READ, WRITE };
+enum class GpioOperation { READ, WRITE };
 
 enum class GpioTypes {
   NONE,