diff --git a/build.gradle b/build.gradle
index 89f97a9..0cfb575 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,6 @@ buildscript {
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
-        classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:$gradle_bintray_plugin_version"
     }
 }
 
@@ -29,7 +28,7 @@ repositories {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$kotlin_serialisation_runtime_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlin_serialisation_runtime_version"
     implementation "joda-time:joda-time:$joda_time_version"
 
     // Use JUnit test framework
diff --git a/gradle.properties b/gradle.properties
index f778c7d..3c4ca20 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 kotlin.code.style=official
-kotlin_version=1.3.31
-kotlin_coroutines_version=1.2.1
-kotlin_serialisation_runtime_version=0.11.0
+kotlin_version=1.5.0
+kotlin_coroutines_version=1.4.3
+kotlin_serialisation_runtime_version=1.2.0
 joda_time_version=2.10.1
 ktor_version=1.1.4
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 19c6ad2..7156cc8 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-bin.zip
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/CeilInfoResolver.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/CeilInfoResolver.kt
index c20e2b0..2edf0c2 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/CeilInfoResolver.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/CeilInfoResolver.kt
@@ -2,6 +2,7 @@ package com.github.insanusmokrassar.PsychomatrixBase.utils.CeilDescriptions
 
 import com.github.insanusmokrassar.PsychomatrixBase.utils.CeilDescriptions.models.CeilsInfosRoot
 import com.github.insanusmokrassar.PsychomatrixBase.utils.FilesLoader.load
+import com.github.insanusmokrassar.PsychomatrixBase.utils.nonstrictJson
 import kotlinx.serialization.json.Json
 import java.io.InputStreamReader
 
@@ -27,6 +28,6 @@ private fun findSubTranslation(language: String): String {
 
 fun resolveCeilsDescriptionsByLanguage(language: String = "en_US"): CeilsInfosRoot {
     return load("$characteristicsFolder/${findSubTranslation(language)}.json").let {
-        Json.nonstrict.parse(CeilsInfosRoot.serializer(), InputStreamReader(it).readText())
+        nonstrictJson.decodeFromString(CeilsInfosRoot.serializer(), InputStreamReader(it).readText())
     }
 }
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/models/CeilInfoConfig.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/models/CeilInfoConfig.kt
index ef62eb3..8fb7775 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/models/CeilInfoConfig.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/CeilDescriptions/models/CeilInfoConfig.kt
@@ -1,7 +1,6 @@
 package com.github.insanusmokrassar.PsychomatrixBase.utils.CeilDescriptions.models
 
 import com.github.insanusmokrassar.PsychomatrixBase.domain.entities.CeilInfo
-import kotlinx.serialization.Optional
 import kotlinx.serialization.Serializable
 
 @Serializable
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/Json.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/Json.kt
new file mode 100644
index 0000000..26cb5a5
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/utils/Json.kt
@@ -0,0 +1,8 @@
+package com.github.insanusmokrassar.PsychomatrixBase.utils
+
+import kotlinx.serialization.json.Json
+
+val nonstrictJson = Json {
+    ignoreUnknownKeys = true
+    allowSpecialFloatingPointValues = true
+}