diff --git a/build.gradle.kts b/build.gradle.kts
index 561fe583..164d525d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -16,6 +16,7 @@
 
 */
 
+import com.charleskorn.kaml.build.Versions
 import com.charleskorn.kaml.build.configureAssemble
 import com.charleskorn.kaml.build.configureJacoco
 import com.charleskorn.kaml.build.configurePublishing
@@ -23,26 +24,19 @@ import com.charleskorn.kaml.build.configureSpotless
 import com.charleskorn.kaml.build.configureTesting
 import com.charleskorn.kaml.build.configureVersioning
 import com.charleskorn.kaml.build.configureWrapper
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 buildscript {
     repositories {
         jcenter()
     }
-
-    dependencies {
-        classpath(kotlin("serialization", version = "1.4.10"))
-    }
 }
 
 plugins {
-    kotlin("jvm") version "1.4.10"
-
-    apply { id("com.github.ben-manes.versions") version "0.36.0" }
+    kotlin("multiplatform") version "1.4.10"
+    kotlin("plugin.serialization") version "1.4.10"
+    id("com.github.ben-manes.versions") version "0.36.0"
 }
 
-apply(plugin = "kotlinx-serialization")
-
 group = "com.charleskorn.kaml"
 
 repositories {
@@ -51,28 +45,48 @@ repositories {
     maven(url = "https://kotlin.bintray.com/kotlinx")
 }
 
-dependencies {
-    implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
-
-    implementation(kotlin("stdlib-jdk8"))
-    implementation(group = "org.snakeyaml", name = "snakeyaml-engine", version = "2.2.1")
-    implementation(group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-core", version = "1.0.1")
-
-    val spekVersion = "2.0.15"
-
-    testImplementation(group = "org.spekframework.spek2", name = "spek-dsl-jvm", version = spekVersion)
-    testImplementation(group = "ch.tutteli.atrium", name = "atrium-fluent-en_GB", version = "0.15.0")
-
-    testRuntimeOnly(group = "org.spekframework.spek2", name = "spek-runner-junit5", version = spekVersion)
-}
-
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "1.8"
-    kotlinOptions.freeCompilerArgs = listOf("-Xuse-experimental=kotlin.RequiresOptIn")
-}
-
 kotlin {
     explicitApi()
+
+    jvm {
+        withJava()
+        compilations.all {
+            kotlinOptions {
+                jvmTarget = "1.8"
+            }
+        }
+    }
+
+    sourceSets {
+        all {
+            languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        }
+        val commonMain by getting {
+            dependencies {
+                implementation("org.jetbrains.kotlinx:kotlinx-serialization-core:${Versions.serialization}")
+            }
+        }
+        val commonTest by getting {
+            dependencies {
+                implementation("org.spekframework.spek2:spek-dsl-metadata:${Versions.spek}")
+                implementation("ch.tutteli.atrium:atrium-fluent-en_GB-common:${Versions.atrium}")
+            }
+        }
+        val jvmMain by getting {
+            dependencies {
+                implementation(project.dependencies.platform("org.jetbrains.kotlin:kotlin-bom"))
+                implementation(kotlin("stdlib-jdk8"))
+                implementation("org.snakeyaml:snakeyaml-engine:${Versions.snakeYaml}")
+            }
+        }
+        val jvmTest by getting {
+            dependencies {
+                implementation("org.spekframework.spek2:spek-dsl-jvm:${Versions.spek}")
+                implementation("ch.tutteli.atrium:atrium-fluent-en_GB:${Versions.atrium}")
+                runtimeOnly("org.spekframework.spek2:spek-runner-junit5:${Versions.spek}")
+            }
+        }
+    }
 }
 
 configureAssemble()
diff --git a/buildSrc/src/main/kotlin/com/charleskorn/kaml/build/Versions.kt b/buildSrc/src/main/kotlin/com/charleskorn/kaml/build/Versions.kt
new file mode 100644
index 00000000..75a79c91
--- /dev/null
+++ b/buildSrc/src/main/kotlin/com/charleskorn/kaml/build/Versions.kt
@@ -0,0 +1,26 @@
+/*
+
+   Copyright 2018-2020 Charles Korn.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+*/
+
+package com.charleskorn.kaml.build
+
+object Versions {
+    const val atrium = "0.15.0"
+    const val serialization = "1.0.1"
+    const val snakeYaml = "2.2.1"
+    const val spek = "2.0.15"
+}
diff --git a/src/main/kotlin/com/charleskorn/kaml/Location.kt b/src/commonMain/kotlin/com/charleskorn/kaml/Location.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/Location.kt
rename to src/commonMain/kotlin/com/charleskorn/kaml/Location.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlException.kt b/src/commonMain/kotlin/com/charleskorn/kaml/YamlException.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlException.kt
rename to src/commonMain/kotlin/com/charleskorn/kaml/YamlException.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlNode.kt b/src/commonMain/kotlin/com/charleskorn/kaml/YamlNode.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlNode.kt
rename to src/commonMain/kotlin/com/charleskorn/kaml/YamlNode.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlPath.kt b/src/commonMain/kotlin/com/charleskorn/kaml/YamlPath.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlPath.kt
rename to src/commonMain/kotlin/com/charleskorn/kaml/YamlPath.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/Assertions.kt b/src/commonTest/kotlin/com/charleskorn/kaml/Assertions.kt
similarity index 99%
rename from src/test/kotlin/com/charleskorn/kaml/Assertions.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/Assertions.kt
index bd4eace6..2eecbced 100644
--- a/src/test/kotlin/com/charleskorn/kaml/Assertions.kt
+++ b/src/commonTest/kotlin/com/charleskorn/kaml/Assertions.kt
@@ -20,6 +20,7 @@ package com.charleskorn.kaml
 
 import ch.tutteli.atrium.api.fluent.en_GB.feature
 import ch.tutteli.atrium.creating.Expect
+import kotlin.jvm.JvmName
 
 fun <T : YamlException> Expect<T>.path(assertionCreator: Expect<YamlPath>.() -> Unit) {
     feature(YamlException::path).addAssertionsCreatedBy(assertionCreator)
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlExceptionTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlExceptionTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlExceptionTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlExceptionTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlListTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlListTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlListTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlListTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlMapTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlMapTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlMapTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlMapTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlNullTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlNullTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlNullTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlNullTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlPathTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlPathTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlPathTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlPathTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlScalarTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlScalarTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlScalarTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlScalarTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlTaggedNodeTest.kt b/src/commonTest/kotlin/com/charleskorn/kaml/YamlTaggedNodeTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlTaggedNodeTest.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/YamlTaggedNodeTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/testobjects/PolymorphicTestObjects.kt b/src/commonTest/kotlin/com/charleskorn/kaml/testobjects/PolymorphicTestObjects.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/testobjects/PolymorphicTestObjects.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/testobjects/PolymorphicTestObjects.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/testobjects/TestObjects.kt b/src/commonTest/kotlin/com/charleskorn/kaml/testobjects/TestObjects.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/testobjects/TestObjects.kt
rename to src/commonTest/kotlin/com/charleskorn/kaml/testobjects/TestObjects.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/Yaml.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/Yaml.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/Yaml.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/Yaml.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlConfiguration.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/YamlConfiguration.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlConfiguration.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/YamlConfiguration.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlInput.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/YamlInput.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlInput.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/YamlInput.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlNodeReader.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/YamlNodeReader.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlNodeReader.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/YamlNodeReader.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlOutput.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/YamlOutput.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlOutput.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/YamlOutput.kt
diff --git a/src/main/kotlin/com/charleskorn/kaml/YamlParser.kt b/src/jvmMain/kotlin/com/charleskorn/kaml/YamlParser.kt
similarity index 100%
rename from src/main/kotlin/com/charleskorn/kaml/YamlParser.kt
rename to src/jvmMain/kotlin/com/charleskorn/kaml/YamlParser.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlNodeReaderTest.kt b/src/jvmTest/kotlin/com/charleskorn/kaml/YamlNodeReaderTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlNodeReaderTest.kt
rename to src/jvmTest/kotlin/com/charleskorn/kaml/YamlNodeReaderTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlReadingTest.kt b/src/jvmTest/kotlin/com/charleskorn/kaml/YamlReadingTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlReadingTest.kt
rename to src/jvmTest/kotlin/com/charleskorn/kaml/YamlReadingTest.kt
diff --git a/src/test/kotlin/com/charleskorn/kaml/YamlWritingTest.kt b/src/jvmTest/kotlin/com/charleskorn/kaml/YamlWritingTest.kt
similarity index 100%
rename from src/test/kotlin/com/charleskorn/kaml/YamlWritingTest.kt
rename to src/jvmTest/kotlin/com/charleskorn/kaml/YamlWritingTest.kt