diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/blockentity/EnergyCounterRenderer.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/blockentity/EnergyCounterRenderer.kt
index 2c1b70a67..741f3f925 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/blockentity/EnergyCounterRenderer.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/blockentity/EnergyCounterRenderer.kt
@@ -20,12 +20,13 @@ import ru.dbotthepony.mc.otm.core.math.asAngle
 import ru.dbotthepony.mc.otm.core.math.clusterize
 import ru.dbotthepony.mc.otm.core.util.formatPower
 import ru.dbotthepony.mc.otm.core.math.times
+import ru.dbotthepony.mc.otm.core.util.GJRAND64RandomSource
 import java.util.Random
 import kotlin.math.PI
 import kotlin.math.absoluteValue
 
 class EnergyCounterRenderer(private val context: BlockEntityRendererProvider.Context) : BlockEntityRenderer<EnergyCounterBlockEntity> {
-	private val random = Random()
+	private val random = GJRAND64RandomSource()
 
 	override fun render(
 		tile: EnergyCounterBlockEntity,
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
index 961540d14..411b081c6 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/core/util/Formatting.kt
@@ -9,6 +9,7 @@ import net.minecraft.network.chat.FormattedText
 import net.minecraft.network.chat.MutableComponent
 import net.minecraft.world.inventory.tooltip.TooltipComponent
 import ru.dbotthepony.kommons.math.RGBAColor
+import ru.dbotthepony.mc.otm.THREAD_LOCAL_RANDOM
 import ru.dbotthepony.mc.otm.client.render.ChartLevelLabels
 import ru.dbotthepony.mc.otm.client.render.ChartTooltipElement
 import ru.dbotthepony.mc.otm.config.ClientConfig
@@ -453,10 +454,8 @@ private fun formatHistoryChart(
 			labelNames[0f] = (-maxTransferred).formatSiComponent(suffix, decimals, formatAsReadable = verbose, bias = bias)
 			labelNames[1f] = maxReceived.formatSiComponent(suffix, decimals, formatAsReadable = verbose, bias = bias)
 
-			val rand = java.util.Random()
-
 			if (maxTransferred.isNotZero && transferredMult > 0.2f) {
-				for (cluster in widget.transferred.clusterize(rand, zeroBound = true)) {
+				for (cluster in widget.transferred.clusterize(THREAD_LOCAL_RANDOM, zeroBound = true)) {
 					val perc = (cluster.center / maxTransferred).toFloat() * transferredMult
 
 					if (labelNames.keys.none { (it - perc).absoluteValue < 0.08f })
@@ -465,7 +464,7 @@ private fun formatHistoryChart(
 			}
 
 			if (maxReceived.isNotZero && receivedMult > 0.2f) {
-				for (cluster in widget.received.clusterize(rand, zeroBound = true)) {
+				for (cluster in widget.received.clusterize(THREAD_LOCAL_RANDOM, zeroBound = true)) {
 					val perc = zero + (cluster.center / maxReceived).toFloat() * receivedMult
 
 					if (labelNames.keys.none { (it - perc).absoluteValue < 0.08f })
@@ -473,7 +472,7 @@ private fun formatHistoryChart(
 				}
 			}
 
-			val clusters = diff.asIterable().clusterize(rand, zeroBound = true)
+			val clusters = diff.asIterable().clusterize(THREAD_LOCAL_RANDOM, zeroBound = true)
 
 			for (cluster in clusters) {
 				val perc: Float