diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2098010..c4011be5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -175,6 +175,14 @@
 - Updated Ukrainian translations ([#195](https://github.com/LambdAurora/LambDynamicLights/pull/195)).
 - Updated to Minecraft 1.20.4 ([#202](https://github.com/LambdAurora/LambDynamicLights/pull/202)).
 
+## 3.0.0
+
+- Updated to Minecraft 1.21 ([#227](https://github.com/LambdAurora/LambDynamicLights/pull/227))
+- Updated configuration library.
+  - Configuration corruption should now be fixed.
+- Updated Mexican Spanish translations ([#214](https://github.com/LambdAurora/LambDynamicLights/pull/214)).
+- Switched license to [Lambda License](https://github.com/LambdAurora/LambDynamicLights/blob/bbefb8860bca2e797f8a2ba8a59d1120b6e1c7b4/LICENSE).
+
 [SpruceUI]: https://github.com/LambdAurora/SpruceUI "SpruceUI page"
 [pridelib]: https://github.com/Queerbric/pridelib "Pridelib page"
 [Sodium]: https://modrinth.com/mod/sodium "Sodium Modrinth page"
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8db9460e..d10a1e65 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -12,7 +12,7 @@ modmenu = "11.0.1"
 sodium = "mc1.21-0.5.9"
 
 # Configuration
-nightconfig = "3.6.6"
+nightconfig = "3.8.1"
 
 [libraries]
 minecraft = { module = "com.mojang:minecraft", version.ref = "minecraft" }
diff --git a/src/main/java/dev/lambdaurora/lambdynlights/DynamicLightsConfig.java b/src/main/java/dev/lambdaurora/lambdynlights/DynamicLightsConfig.java
index de19c75f..b6c6825a 100644
--- a/src/main/java/dev/lambdaurora/lambdynlights/DynamicLightsConfig.java
+++ b/src/main/java/dev/lambdaurora/lambdynlights/DynamicLightsConfig.java
@@ -10,6 +10,7 @@
 package dev.lambdaurora.lambdynlights;
 
 import com.electronwill.nightconfig.core.file.FileConfig;
+import com.electronwill.nightconfig.core.io.WritingMode;
 import dev.lambdaurora.lambdynlights.config.BooleanSettingEntry;
 import dev.lambdaurora.lambdynlights.config.SettingEntry;
 import dev.lambdaurora.spruceui.option.SpruceCyclingOption;
@@ -61,7 +62,11 @@ public class DynamicLightsConfig {
 	public DynamicLightsConfig(@NotNull LambDynLights mod) {
 		this.mod = mod;
 
-		this.config = FileConfig.builder(CONFIG_FILE_PATH).concurrent().defaultResource("/lambdynlights.toml").autosave().build();
+		this.config = FileConfig.builder(CONFIG_FILE_PATH)
+				.defaultResource("/lambdynlights.toml")
+				.autosave()
+				.writingMode(WritingMode.REPLACE_ATOMIC)
+				.build();
 		this.entitiesLightSource = new BooleanSettingEntry("light_sources.entities", DEFAULT_ENTITIES_LIGHT_SOURCE, this.config,
 				Text.translatable("lambdynlights.tooltip.entities"))
 				.withOnSet(value -> {
diff --git a/src/main/resources/lambdynlights.toml b/src/main/resources/lambdynlights.toml
index 5a170130..3575f515 100644
--- a/src/main/resources/lambdynlights.toml
+++ b/src/main/resources/lambdynlights.toml
@@ -2,20 +2,20 @@
 # The dynamic lights mode
 mode = "fancy"
 
- # Light sources settings.
+# Light sources settings.
 [light_sources]
-    # Enable entities light source.
-    entities = true
-    # Enable first-person player light source.
-    self = true
-    # Enable block entities light source.
-    block_entities = true
-    # Enables water-sensitive light sources check. This means that water-sensitive items will not light up when submerged in water.
-    water_sensitive_check = true
-    # Creeper lighting mode. May be off, simple or fancy.
-    creeper = "simple"
-    # TNT lighting mode. May be off, simple or fancy.
-    tnt = "off"
+	# Enable entities light source.
+	entities = true
+	# Enable first-person player light source.
+	self = true
+	# Enable block entities light source.
+	block_entities = true
+	# Enables water-sensitive light sources check. This means that water-sensitive items will not light up when submerged in water.
+	water_sensitive_check = true
+	# Creeper lighting mode. May be off, simple or fancy.
+	creeper = "simple"
+	# TNT lighting mode. May be off, simple or fancy.
+	tnt = "off"
 
 [light_sources.settings.entities.minecraft]
-    glow_item_frame = false
+	glow_item_frame = false