diff --git a/common/src/main/kotlin/org/valkyrienskies/mod/common/entity/VSPhysicsEntity.kt b/common/src/main/kotlin/org/valkyrienskies/mod/common/entity/VSPhysicsEntity.kt
index 3b06dd6ac..2fa397a5a 100644
--- a/common/src/main/kotlin/org/valkyrienskies/mod/common/entity/VSPhysicsEntity.kt
+++ b/common/src/main/kotlin/org/valkyrienskies/mod/common/entity/VSPhysicsEntity.kt
@@ -36,7 +36,7 @@ import org.valkyrienskies.mod.common.util.toJOML
 import org.valkyrienskies.mod.common.util.toMinecraft
 import org.valkyrienskies.mod.mixin.accessors.entity.EntityAccessor
 
-class VSPhysicsEntity(type: EntityType<VSPhysicsEntity>, level: Level) : Entity(type, level) {
+open class VSPhysicsEntity(type: EntityType<VSPhysicsEntity>, level: Level) : Entity(type, level) {
     // Physics data, persistent
     private var physicsEntityData: PhysicsEntityData? = null