diff --git a/src/main/kotlin/com/xpdustry/toxopid/spec/ModDependency.kt b/src/main/kotlin/com/xpdustry/toxopid/spec/ModDependency.kt
index 993da5a..8419bf0 100644
--- a/src/main/kotlin/com/xpdustry/toxopid/spec/ModDependency.kt
+++ b/src/main/kotlin/com/xpdustry/toxopid/spec/ModDependency.kt
@@ -25,10 +25,12 @@
  */
 package com.xpdustry.toxopid.spec
 
+import java.io.Serializable
+
 /**
  * Represents a mod dependency.
  */
 public data class ModDependency(
     val name: String,
     val soft: Boolean = false,
-)
+) : Serializable
diff --git a/src/main/kotlin/com/xpdustry/toxopid/spec/ModMetadata.kt b/src/main/kotlin/com/xpdustry/toxopid/spec/ModMetadata.kt
index 82a53c4..4fd6fd4 100644
--- a/src/main/kotlin/com/xpdustry/toxopid/spec/ModMetadata.kt
+++ b/src/main/kotlin/com/xpdustry/toxopid/spec/ModMetadata.kt
@@ -30,6 +30,7 @@ import org.hjson.JsonArray
 import org.hjson.JsonObject
 import org.hjson.Stringify
 import java.io.File
+import java.io.Serializable
 
 /**
  * Represents the metadata of a mod.
@@ -50,7 +51,7 @@ public data class ModMetadata(
     public var textureScale: Float = 1f,
     public var pregenerated: Boolean = false,
     public val dependencies: MutableList<ModDependency> = mutableListOf(),
-) {
+) : Serializable {
     public companion object {
         /**
          * @return a parsed [ModMetadata] from json