diff --git a/README.md b/README.md
index 47e8a6d4..5d374f7b 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ Maven:
     <dependency>
         <groupId>com.github.sokomishalov.skraper</groupId>
         <artifactId>skrapers</artifactId>
-        <version>0.5.0</version>
+        <version>0.5.1</version>
     </dependency>
 </dependencies>
 ```
@@ -136,7 +136,7 @@ repositories {
     maven { url = uri("http://jitpack.io") }
 }
 dependencies {
-    implementation("com.github.sokomishalov.skraper:skrapers:0.5.0")
+    implementation("com.github.sokomishalov.skraper:skrapers:0.5.1")
 }
 ```
 
diff --git a/cli/src/main/kotlin/ru/sokomishalov/skraper/cli/Main.kt b/cli/src/main/kotlin/ru/sokomishalov/skraper/cli/Main.kt
index 4516a1ba..40dab09a 100644
--- a/cli/src/main/kotlin/ru/sokomishalov/skraper/cli/Main.kt
+++ b/cli/src/main/kotlin/ru/sokomishalov/skraper/cli/Main.kt
@@ -42,7 +42,7 @@ import kotlin.text.Charsets.UTF_8
 fun main(args: Array<String>) = mainBody(columns = 100) {
     val parsedArgs = ArgParser(args = args.ifEmpty { arrayOf("--help") }).parseInto(::Args)
 
-    println("${"Skraper".green()} ${"v.0.5.0".magenta()} started")
+    println("${"Skraper".green()} ${"v.0.5.1".magenta()} started")
 
     val posts = runBlocking {
         parsedArgs.skraper.getPosts(
diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index d7ab5bef..900e76e2 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -37,7 +37,7 @@ repositories {
 }
 
 dependencies {
-    def skraper_version = "0.5.0"
+    def skraper_version = "0.5.1"
 
     implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version'
     implementation 'androidx.appcompat:appcompat:1.1.0'
diff --git a/pom.xml b/pom.xml
index b3d0c59e..404691fd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,22 +10,22 @@
     <packaging>pom</packaging>
 
     <properties>
-        <revision>0.5.0</revision>
+        <revision>0.5.1</revision>
 
         <java.version>1.8</java.version>
         <kotlin.version>1.3.72</kotlin.version>
 
-        <kotlinx-coroutines.version>1.3.7</kotlinx-coroutines.version>
-        <jackson.version>2.11.0</jackson.version>
+        <kotlinx-coroutines.version>1.3.8</kotlinx-coroutines.version>
+        <jackson.version>2.11.1</jackson.version>
         <jsoup.version>1.13.1</jsoup.version>
-        <reactor-netty.version>0.9.8.RELEASE</reactor-netty.version>
-        <okhttp.version>4.7.2</okhttp.version>
-        <spring.version>5.2.6.RELEASE</spring.version>
-        <spring.boot.version>2.3.0.RELEASE</spring.boot.version>
+        <reactor-netty.version>0.9.10.RELEASE</reactor-netty.version>
+        <okhttp.version>4.8.0</okhttp.version>
+        <spring.version>5.2.7.RELEASE</spring.version>
+        <spring.boot.version>2.3.1.RELEASE</spring.boot.version>
         <ktor.version>1.3.2</ktor.version>
         <argparser.version>2.0.7</argparser.version>
         <telegram-bots.version>4.9</telegram-bots.version>
-        <sokomishalov-commons.version>1.1.15</sokomishalov-commons.version>
+        <sokomishalov-commons.version>1.1.18</sokomishalov-commons.version>
         <logback.version>1.2.3</logback.version>
     </properties>
 
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/facebook/FacebookSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/facebook/FacebookSkraper.kt
index e63e6a99..d1e575ce 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/facebook/FacebookSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/facebook/FacebookSkraper.kt
@@ -38,7 +38,7 @@ import ru.sokomishalov.skraper.model.*
 /**
  * @author sokomishalov
  */
-class FacebookSkraper @JvmOverloads constructor(
+open class FacebookSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://facebook.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/flickr/FlickrSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/flickr/FlickrSkraper.kt
index dc5ee381..ef33e348 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/flickr/FlickrSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/flickr/FlickrSkraper.kt
@@ -38,7 +38,7 @@ import ru.sokomishalov.skraper.model.MediaSize.*
 /**
  * @author sokomishalov
  */
-class FlickrSkraper @JvmOverloads constructor(
+open class FlickrSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://flickr.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ifunny/IFunnySkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ifunny/IFunnySkraper.kt
index 7ed6103b..a24c1840 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ifunny/IFunnySkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ifunny/IFunnySkraper.kt
@@ -32,7 +32,7 @@ import ru.sokomishalov.skraper.model.MediaSize.*
 /**
  * @author sokomishalov
  */
-class IFunnySkraper @JvmOverloads constructor(
+open class IFunnySkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://ifunny.co"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/instagram/InstagramSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/instagram/InstagramSkraper.kt
index 25bad4ee..b0c67171 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/instagram/InstagramSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/instagram/InstagramSkraper.kt
@@ -30,7 +30,7 @@ import ru.sokomishalov.skraper.model.MediaSize.*
 /**
  * @author sokomishalov
  */
-class InstagramSkraper @JvmOverloads constructor(
+open class InstagramSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         private val gqlUserMediasQueryId: String = "17888483320059182",
         override val baseUrl: URLString = "https://instagram.com"
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ninegag/NinegagSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ninegag/NinegagSkraper.kt
index af36ebbf..949f18db 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ninegag/NinegagSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/ninegag/NinegagSkraper.kt
@@ -33,7 +33,7 @@ import java.time.Duration
 /**
  * @author sokomishalov
  */
-class NinegagSkraper @JvmOverloads constructor(
+open class NinegagSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://9gag.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pikabu/PikabuSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pikabu/PikabuSkraper.kt
index 2264d764..e60adf78 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pikabu/PikabuSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pikabu/PikabuSkraper.kt
@@ -32,7 +32,7 @@ import java.time.ZonedDateTime
 import java.time.format.DateTimeFormatter
 import kotlin.text.Charsets.UTF_8
 
-class PikabuSkraper @JvmOverloads constructor(
+open class PikabuSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://pikabu.ru"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pinterest/PinterestSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pinterest/PinterestSkraper.kt
index ba0ed2f0..90208dd0 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pinterest/PinterestSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/pinterest/PinterestSkraper.kt
@@ -34,7 +34,7 @@ import java.util.Locale.ROOT
 /**
  * @author sokomishalov
  */
-class PinterestSkraper @JvmOverloads constructor(
+open class PinterestSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://pinterest.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/reddit/RedditSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/reddit/RedditSkraper.kt
index 2f7db5e6..d59ddeee 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/reddit/RedditSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/reddit/RedditSkraper.kt
@@ -28,7 +28,7 @@ import ru.sokomishalov.skraper.internal.number.div
 import ru.sokomishalov.skraper.internal.serialization.*
 import ru.sokomishalov.skraper.model.*
 
-class RedditSkraper @JvmOverloads constructor(
+open class RedditSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://reddit.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/tumblr/TumblrSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/tumblr/TumblrSkraper.kt
index 30ef2f48..4a6bbd48 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/tumblr/TumblrSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/tumblr/TumblrSkraper.kt
@@ -36,7 +36,7 @@ import java.time.ZoneOffset.UTC
 import java.time.format.DateTimeFormatter
 import java.util.Locale.ENGLISH
 
-class TumblrSkraper @JvmOverloads constructor(
+open class TumblrSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://tumblr.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitch/TwitchSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitch/TwitchSkraper.kt
index 73085d69..e0a4117c 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitch/TwitchSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitch/TwitchSkraper.kt
@@ -33,7 +33,7 @@ import kotlin.text.Charsets.UTF_8
 /**
  * @author sokomishalov
  */
-class TwitchSkraper @JvmOverloads constructor(
+open class TwitchSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://twitch.tv",
         private val graphBaseUrl: URLString = "https://gql.twitch.tv/gql",
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitter/TwitterSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitter/TwitterSkraper.kt
index 675fac2d..6ff454fe 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitter/TwitterSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/twitter/TwitterSkraper.kt
@@ -35,7 +35,7 @@ import kotlin.text.Charsets.UTF_8
 /**
  * @author sokomishalov
  */
-class TwitterSkraper @JvmOverloads constructor(
+open class TwitterSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://twitter.com",
         private val apiBaseUrl: URLString = "https://api.twitter.com"
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/vk/VkSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/vk/VkSkraper.kt
index 03fc6f2c..ac7755a8 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/vk/VkSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/vk/VkSkraper.kt
@@ -34,7 +34,7 @@ import java.util.Locale.ENGLISH
 /**
  * @author sokomishalov
  */
-class VkSkraper @JvmOverloads constructor(
+open class VkSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://vk.com"
 ) : Skraper {
diff --git a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/youtube/YoutubeSkraper.kt b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/youtube/YoutubeSkraper.kt
index a4fe5e48..3947703e 100644
--- a/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/youtube/YoutubeSkraper.kt
+++ b/skrapers/src/main/kotlin/ru/sokomishalov/skraper/provider/youtube/YoutubeSkraper.kt
@@ -34,7 +34,7 @@ import java.time.chrono.ChronoPeriod
 import java.time.temporal.ChronoUnit.DAYS
 import java.time.temporal.TemporalAmount
 
-class YoutubeSkraper @JvmOverloads constructor(
+open class YoutubeSkraper @JvmOverloads constructor(
         override val client: SkraperClient = DefaultBlockingSkraperClient,
         override val baseUrl: URLString = "https://www.youtube.com"
 ) : Skraper {