diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/CMWCRandom.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/CMWCRandom.kt
index a41a68b54..767637340 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/CMWCRandom.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/CMWCRandom.kt
@@ -4,10 +4,11 @@ import net.minecraft.util.Mth
 import net.minecraft.util.RandomSource
 import net.minecraft.world.level.levelgen.MarsagliaPolarGaussian
 import net.minecraft.world.level.levelgen.PositionalRandomFactory
+import net.minecraft.world.level.levelgen.RandomSupport
 import java.lang.StringBuilder
 import java.util.random.RandomGenerator
 
-class CMWCRandom(seed: Long = System.nanoTime()) : RandomGenerator, RandomSource {
+class CMWCRandom(seed: Long = RandomSupport.generateUniqueSeed()) : RandomGenerator, RandomSource {
 	private val state = IntArray(CMWC_STATE_SIZE)
 	private var carry = 0
 	private var stateIndex = 0
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/LCG64Random.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/LCG64Random.kt
index 271b8a6a9..7cac69c0d 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/LCG64Random.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/LCG64Random.kt
@@ -4,13 +4,14 @@ import net.minecraft.util.Mth
 import net.minecraft.util.RandomSource
 import net.minecraft.world.level.levelgen.MarsagliaPolarGaussian
 import net.minecraft.world.level.levelgen.PositionalRandomFactory
+import net.minecraft.world.level.levelgen.RandomSupport
 import java.lang.StringBuilder
 import java.util.random.RandomGenerator
 
 // different from LegacyRandomSource minecraft uses in meaning that this class use different constants
 // and always use upper 32 bits instead of implementing BitRandomSource
 // AND it uses all bits from provided seed
-class LCG64Random(private var seed: Long = System.nanoTime()) : RandomGenerator, RandomSource {
+class LCG64Random(private var seed: Long = RandomSupport.generateUniqueSeed()) : RandomGenerator, RandomSource {
 	private val gaussian = MarsagliaPolarGaussian(this)
 
 	override fun setSeed(seed: Long) {
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Xoshiro256SSRandom.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Xoshiro256SSRandom.kt
index e14e7ed02..472c89b27 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Xoshiro256SSRandom.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Xoshiro256SSRandom.kt
@@ -5,6 +5,7 @@ import net.minecraft.util.Mth
 import net.minecraft.util.RandomSource
 import net.minecraft.world.level.levelgen.MarsagliaPolarGaussian
 import net.minecraft.world.level.levelgen.PositionalRandomFactory
+import net.minecraft.world.level.levelgen.RandomSupport
 import java.lang.StringBuilder
 import java.util.random.RandomGenerator
 
@@ -16,10 +17,12 @@ class Xoshiro256SSRandom(
 ) : RandomGenerator, RandomSource {
 	private val gaussian = MarsagliaPolarGaussian(this)
 
-	constructor(seed: Long = System.nanoTime()) : this(1L, 2L, 3L, 4L) {
+	constructor(seed: Long) : this(1L, 2L, 3L, 4L) {
 		setSeed(seed)
 	}
 
+	constructor() : this(RandomSupport.generateUniqueSeed(), RandomSupport.generateUniqueSeed(), RandomSupport.generateUniqueSeed(), RandomSupport.generateUniqueSeed())
+
 	override fun setSeed(seed: Long) {
 		val rng = LCG64Random(seed)
 		s0 = rng.nextLong()