diff --git a/crypto/build.gradle.kts b/crypto/build.gradle.kts
index 48035e80..a91f061a 100644
--- a/crypto/build.gradle.kts
+++ b/crypto/build.gradle.kts
@@ -4,6 +4,7 @@ plugins {
 }
 
 dependencies {
+    api("com.fasterxml.jackson.core:jackson-databind:${Versions.jackson}")
     api("com.google.inject:guice:${Versions.guice}")
     api("io.netty:netty-buffer:${Versions.netty}")
     api("org.bouncycastle:bcpkix-jdk15on:${Versions.bouncyCastlePkix}")
diff --git a/crypto/src/main/kotlin/org/openrs2/crypto/CryptoJacksonModule.kt b/crypto/src/main/kotlin/org/openrs2/crypto/CryptoJacksonModule.kt
new file mode 100644
index 00000000..35c866d5
--- /dev/null
+++ b/crypto/src/main/kotlin/org/openrs2/crypto/CryptoJacksonModule.kt
@@ -0,0 +1,11 @@
+package org.openrs2.crypto
+
+import com.fasterxml.jackson.databind.module.SimpleModule
+import javax.inject.Singleton
+
+@Singleton
+public class CryptoJacksonModule : SimpleModule() {
+    init {
+        addSerializer(XteaKey::class.java, XteaKeySerializer)
+    }
+}
diff --git a/crypto/src/main/kotlin/org/openrs2/crypto/CryptoModule.kt b/crypto/src/main/kotlin/org/openrs2/crypto/CryptoModule.kt
index e317916b..f0f748ae 100644
--- a/crypto/src/main/kotlin/org/openrs2/crypto/CryptoModule.kt
+++ b/crypto/src/main/kotlin/org/openrs2/crypto/CryptoModule.kt
@@ -1,7 +1,9 @@
 package org.openrs2.crypto
 
+import com.fasterxml.jackson.databind.Module
 import com.google.inject.AbstractModule
 import com.google.inject.Scopes
+import com.google.inject.multibindings.Multibinder
 import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters
 
 public object CryptoModule : AbstractModule() {
@@ -9,5 +11,8 @@ public object CryptoModule : AbstractModule() {
         bind(RSAPrivateCrtKeyParameters::class.java)
             .toProvider(RsaKeyProvider::class.java)
             .`in`(Scopes.SINGLETON)
+
+        Multibinder.newSetBinder(binder(), Module::class.java)
+            .addBinding().to(CryptoJacksonModule::class.java)
     }
 }
diff --git a/crypto/src/main/kotlin/org/openrs2/crypto/XteaKeySerializer.kt b/crypto/src/main/kotlin/org/openrs2/crypto/XteaKeySerializer.kt
new file mode 100644
index 00000000..971a070d
--- /dev/null
+++ b/crypto/src/main/kotlin/org/openrs2/crypto/XteaKeySerializer.kt
@@ -0,0 +1,16 @@
+package org.openrs2.crypto
+
+import com.fasterxml.jackson.core.JsonGenerator
+import com.fasterxml.jackson.databind.SerializerProvider
+import com.fasterxml.jackson.databind.ser.std.StdSerializer
+
+public object XteaKeySerializer : StdSerializer<XteaKey>(XteaKey::class.java) {
+    override fun serialize(value: XteaKey, gen: JsonGenerator, provider: SerializerProvider) {
+        gen.writeStartArray()
+        gen.writeNumber(value.k0)
+        gen.writeNumber(value.k1)
+        gen.writeNumber(value.k2)
+        gen.writeNumber(value.k3)
+        gen.writeEndArray()
+    }
+}