diff --git a/CHANGELOG.md b/CHANGELOG.md
index 335c0f7b..909d6fb8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v5.0.0]
+
+## Changes
+
+- GPIO HAL: Renamed entries of enumerations to avoid nameclashes with Windows defines.
+  `IN` and `OUT` in `Direction` changed to `DIR_IN` and `DIR_OUT`.
+  `CALLBACK` in `GpioTypes` changed to `TYPE_CALLBACK`
+
 # [v4.0.0]
 
 ## Additions
diff --git a/README.md b/README.md
index 89a10f4b..dff87b2e 100644
--- a/README.md
+++ b/README.md
@@ -71,9 +71,9 @@ add and link against the FSFW library in general.
 
 4. Link against the FSFW library
 
-	```cmake
-	target_link_libraries(<YourProjectName> PRIVATE fsfw)
-	```
+   ```cmake
+   target_link_libraries(${YourProjectName} PRIVATE fsfw)
+   ```
 
 5. It should now be possible use the FSFW as a static library from the user code.
 
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,
diff --git a/tests/src/fsfw_tests/unit/hal/testCommandExecutor.cpp b/tests/src/fsfw_tests/unit/hal/testCommandExecutor.cpp
index 3ad26876..fa4e0908 100644
--- a/tests/src/fsfw_tests/unit/hal/testCommandExecutor.cpp
+++ b/tests/src/fsfw_tests/unit/hal/testCommandExecutor.cpp
@@ -73,7 +73,7 @@ TEST_CASE("Command Executor", "[cmd-exec]") {
     REQUIRE(result != CommandExecutor::COMMAND_ERROR);
     // This ensures that the tests do not block indefinitely
     usleep(500);
-    REQUIRE(limitIdx < 500);
+    REQUIRE(limitIdx < 50000);
   }
   limitIdx = 0;
   CHECK(bytesHaveBeenRead == true);