diff --git a/testingplayground/build.gradle b/testingplayground/build.gradle
index 050aa94..e2f29ee 100644
--- a/testingplayground/build.gradle
+++ b/testingplayground/build.gradle
@@ -41,5 +41,5 @@ dependencies {
     implementation rxjava
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.4.0"
 }
\ No newline at end of file