diff --git a/README.md b/README.md
index 503152e..bf76d89 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ Since `--repeat` is still missing in PHPUnit [here](https://github.com/johnykvsk
 
 # TODO (ideas, not promises)
 
-* ... nothing at the moment
+* clear only given provider on `addDefinition`?
 
 [ico-license]: https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square
 [ico-scrutinizer]: https://img.shields.io/scrutinizer/coverage/g/johnykvsky/dummygenerator.svg?style=flat-square
diff --git a/docs/howto.md b/docs/howto.md
index 5e3a2dc..1c955ea 100644
--- a/docs/howto.md
+++ b/docs/howto.md
@@ -13,7 +13,7 @@ In this example two things happened:
 
 ### How can I use language-based definitions
 
-Other way to work with localized extensions is to load them all and use by hand-picking:
+Other way to work with localised extensions is to load them all and use by hand-picking:
 
 ```php
         $container = DefinitionContainerBuilder::default();
@@ -29,6 +29,18 @@ but this way we skip `__call` in `DummyGenerator` so it won't work with any othe
 
 **Beware**, you need to pay attention to one thing: naming. Magic method `__call` checks if requested method (like `firstName`) exists in any extension. It checks them one by one, in order of adding. So if you have by some reason 2 extensions that has same method (like `getName()` in both of them) and you run `$generator->getName()` it will execute `getName()` in extension that was added earlier to container.
 
+### How can I change definition on the fly
+
+It can be done like this:
+
+```php
+    $generator->firstName(); // will generate i.e. "Harry"
+    $generator->addDefinition(PersonExtensionInterface::class, ElvesPerson::class);
+    $generator->firstName(); // will generate i.e. "Fingolfin"
+```
+
+**Beware**, this will clear internal cache for all extensions, so they will be resolved again. Not a big deal, but worth keeping in mind.
+
 ### How can I use different strategy
 
 If we want to use different strategy, like uniqueness:
diff --git a/docs/quick_start.md b/docs/quick_start.md
index 9863635..ace73e1 100644
--- a/docs/quick_start.md
+++ b/docs/quick_start.md
@@ -30,6 +30,8 @@ If you like, you can skip all definitions included with `DummyGenerator` and jus
     $generator = new DummyGenerator(new DefinitionContainer(['my_own_item' => new MyOwnItem()]));
 ```
 
+## Strategy
+
 Now that we know what definitions are, let's move to second parameter - Strategy. Strategy is used on generated data to validate it according to our needs. `DummyGenerator` has build in 4 strategies:
 
 * Simple - default one, just generates data
@@ -60,7 +62,7 @@ Container builder allows to load predefined sets of extensions. You can choose b
 
 Just pass any of them to `DummyGenerator`. 
 
-Available packs are:
+Extensions available in each pack:
 
 * Base: Coordinates, Country, DateTime, Hash, Language, Lorem, Number
 * Default, all from Base plus: Internet, Person
@@ -97,17 +99,7 @@ No problem, just try this:
         echo $generator->boo('School'); // gives 'School is a crap!' 
 ```
 
-But what if I want to add/replace some definition "on the fly"? It can be done like this:
-
-```php
-    $generator->firstName(); // will generate i.e. "Harry"
-    $generator->addDefinition(PersonExtensionInterface::class, ElvesPerson::class);
-    $generator->firstName(); // will generate i.e. "Fingolfin"
-```
-
-**beware** - this will clear internal cache for all extensions, so each call will resolve extensions classes. Not a big deal, but worth keeping in mind.
-
-## Text
+## Text Extension
 
 Text extension is a bit different for one reason - it uses external `.txt` file as source to large text. By default, it's in `resources/en_US.txt` but you can either: