diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1450ff8..0797c13 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,7 +28,7 @@ For example this handler will only work on `/` path. By default the HTTP method
 
 
 ```crystal
-OnlyHandler < Kemal::Handler
+class OnlyHandler < Kemal::Handler
   only ["/"]
   
   def call(env)
@@ -41,7 +41,7 @@ end
 The handlers using `exclude` will work on the paths that isn't specified. For example this handler will work on any routes other than `/`.
 
 ```crystal
-ExcludeHandler < Kemal::Handler
+class ExcludeHandler < Kemal::Handler
   exclude ["/"]
   
   def call(env)
@@ -92,7 +92,7 @@ post "/upload" do |env|
     "Upload complete"
   end
 end
-  ```
+```
 
 - Make session configurable. Now you can specify session name and expire time wit
 
diff --git a/src/kemal/handler.cr b/src/kemal/handler.cr
index c4d525a..830295a 100644
--- a/src/kemal/handler.cr
+++ b/src/kemal/handler.cr
@@ -27,7 +27,7 @@ class Kemal::Handler < HTTP::Handler
   #
   # However this is not done automatically. All handlers must inherit from `Kemal::Handler`.
   #
-  #     OnlyHandler < Kemal::Handler
+  #     class OnlyHandler < Kemal::Handler
   #       only ["/"]
   #
   #       def call(env)
@@ -46,7 +46,7 @@ class Kemal::Handler < HTTP::Handler
   #
   # However this is not done automatically. All handlers must inherit from `Kemal::Handler`.
   #
-  #     ExcludeHandler < Kemal::Handler
+  #     class ExcludeHandler < Kemal::Handler
   #       exclude ["/"]
   #
   #       def call(env)