diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index cc4a83f683..1e2c729431 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -293,8 +293,8 @@ Example:
 
 The CMake targets are developed according to the
 [ROS quality levels](https://github.com/ros-infrastructure/rep/blob/master/rep-2004.rst).
-Despite developing some of our targets according to automotive standards like ISO26262, the code base standalone
-does NOT legitimize the usage in a safety critical system. All requirements of a lower quality level are included in
+Despite developing some of the targets according to automotive standards like ISO26262, the code base standalone
+does NOT legitimize the usage in a safety-critical system. All requirements of a lower quality level are included in
 higher quality levels e.g. quality level 4 is included in quality level 3.
 
 ### Quality level 5
diff --git a/README.md b/README.md
index 2b5e1e3a9e..d603c4adf0 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ Please see the dedicated [README.md](tools/docker/README.md) for information on
 
 ### Targeted quality levels & platforms
 
-> [Quality level](./CONTRIBUTING.md#quality-levels) are 5 to 1, where 1 is highest level.
+> [Quality level](./CONTRIBUTING.md#quality-levels) are 5 to 0, where 0 is highest level.
 
 |CMake project/target                     | QNX  | Linux, Windows, MacOS | Comment                             |
 |-----------------------------------------|:----:|:---------------------:|:-----------------------------------:|