diff --git a/README.md b/README.md
index 665859e..a0308e4 100644
--- a/README.md
+++ b/README.md
@@ -20,11 +20,11 @@ also be explicitly required with their stability flag.
 
 ## Usage
 
-1. Create `easy-coding-standard.yml` file in root directory of your project and import the LMC code-style rules:
+1. Create `easy-coding-standard.yaml` file in root directory of your project and import the LMC code-style rules:
 
 ```yaml
 imports:
-    - { resource: 'vendor/lmc/coding-standard/easy-coding-standard.yml' }
+    - { resource: 'vendor/lmc/coding-standard/easy-coding-standard.yaml' }
 ```
 
 2. Run the check command (for `src/` and `tests/` directories):
diff --git a/easy-coding-standard.yml b/easy-coding-standard.yaml
similarity index 100%
rename from easy-coding-standard.yml
rename to easy-coding-standard.yaml
diff --git a/yaml-sort-checker.yml b/yaml-sort-checker.yml
index 1101d20..970f949 100644
--- a/yaml-sort-checker.yml
+++ b/yaml-sort-checker.yml
@@ -1,5 +1,5 @@
 files:
-    easy-coding-standard.yml:
+    easy-coding-standard.yaml:
         depth: 3
         excludedKeys:
             0: parameters