diff --git a/build.gradle b/build.gradle
index 5f0e686..f9183d3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,7 +15,7 @@ repositories {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.21"
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.3.3"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-core-jvm:1.4.0"
     implementation "com.amazon.ion:ion-java:1.9.5"
     testImplementation "io.kotest:kotest-runner-junit5:5.3.0"
     testImplementation "io.kotest:kotest-assertions-core:5.4.2"