diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index bcaf166..893c9a0 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -33,7 +33,7 @@ jobs:
         with:
           file_path: "${{ fromJson(steps.get_release_assets.outputs.downloaded_files)[0] }}"
           game_endpoint: "minecraft"
-          game_versions: "Minecraft 1.20:1.20,Java 17,Forge"
+          game_versions: "Minecraft 1.20:1.20.1,Java 17,Forge"
           project_id: "431430"
           token: ${{ secrets.CF_API_TOKEN }}
           changelog: "${{ fromJson(steps.get_release_by_tag.outputs.data).body }}"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 57c7627..e5363f9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -27,4 +27,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          asset_paths: '["build/libs/*.jar"]'
+          asset_paths: '["build/libs/*.jar", "build/checksums/*.sha512"]'
diff --git a/build.gradle b/build.gradle
index 9c41a6f..7322e73 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,7 @@
 plugins {
     id 'idea'
     id 'maven-publish'
+    id 'org.gradle.crypto.checksum' version '1.4.0'
     id 'net.minecraftforge.gradle' version '[6.0,6.2)'
     id 'org.spongepowered.mixin' version '0.7-SNAPSHOT'
 }
@@ -26,7 +27,7 @@ minecraft {
     //
     // Use non-default mappings at your own risk. They may not always work.
     // Simply re-run your setup task after changing the mappings to update your workspace.
-    mappings channel: 'official', version: '1.20'
+    mappings channel: 'official', version: minecraft_version
 
     // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg') // Currently, this location cannot be changed from the default.
 
@@ -129,14 +130,14 @@ dependencies {
     // Specify the version of Minecraft to use. If this is any group other than 'net.minecraft', it is assumed
     // that the dep is a ForgeGradle 'patcher' dependency, and its patches will be applied.
     // The userdev artifact is a special name and will get all sorts of transformations applied to it.
-    minecraft 'net.minecraftforge:forge:1.20-46.0.2'
+    minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"
 
     annotationProcessor 'org.spongepowered:mixin:0.8.5:processor'
 }
 
 // Example for how to get properties into the manifest for reading at runtime.
 jar {
-    archiveBaseName.set("${mod_id}-${mc_version}")
+    archiveBaseName.set("${mod_id}-${minecraft_version}")
     manifest {
         attributes([
             "Specification-Title"     : mod_id,
@@ -144,17 +145,30 @@ jar {
             "Specification-Version"   : "1", // We are version 1 of ourselves
             "Implementation-Title"    : project.name,
             "Implementation-Version"  : project.jar.archiveVersion,
-            "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
             "MixinConfigs": "${mod_id}.mixins.json"
         ])
     }
+
+    // The settings below make sure that your build is reproducible
+    // More information at https://docs.gradle.org/current/userguide/working_with_files.html#sec:reproducible_archives
+    preserveFileTimestamps = false
+    reproducibleFileOrder = true
+
+    // Example configuration to allow publishing using the maven-publish plugin
+    // This is the preferred method to reobfuscate your jar file
+    finalizedBy('reobfJar')
 }
 
-// Example configuration to allow publishing using the maven-publish plugin
-// This is the preferred method to reobfuscate your jar file
-jar.finalizedBy('reobfJar')
-// However if you are in a multi-project build, dev time needs unobfed jar files, so you can delay the obfuscation until publishing by doing
-// publish.dependsOn('reobfJar')
+// generate checksum for output jar
+import org.gradle.crypto.checksum.Checksum
+tasks.register('createChecksums', Checksum) {
+    dependsOn jar
+
+    inputFiles.setFrom(jar.outputs.files)
+    checksumAlgorithm.set(Checksum.Algorithm.SHA512)
+    appendFileNameToChecksum.set(true)
+}
+build.finalizedBy('createChecksums')
 
 publishing {
     publications {
diff --git a/gradle.properties b/gradle.properties
index 499d869..c425307 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,10 +3,11 @@
 org.gradle.jvmargs=-Xmx3G
 org.gradle.daemon=false
 
-mc_version=1.20
+minecraft_version=1.20.1
+forge_version=47.1.0
 group=net.permutated
 mod_id=flickerfix
-version=4.0.0
+version=4.0.1
 
 
 
diff --git a/src/main/java/net/permutated/flickerfix/mixin/MixinGameRenderer.java b/src/main/java/net/permutated/flickerfix/mixin/MixinGameRenderer.java
index 0c7fdd4..9f36412 100644
--- a/src/main/java/net/permutated/flickerfix/mixin/MixinGameRenderer.java
+++ b/src/main/java/net/permutated/flickerfix/mixin/MixinGameRenderer.java
@@ -1,26 +1,25 @@
 package net.permutated.flickerfix.mixin;
 
-import net.permutated.flickerfix.FlickerFix;
 import net.minecraft.client.renderer.GameRenderer;
-import net.minecraft.world.entity.LivingEntity;
 import net.minecraft.world.effect.MobEffectInstance;
 import net.minecraft.world.effect.MobEffects;
+import net.minecraft.world.entity.LivingEntity;
+import net.permutated.flickerfix.FlickerFix;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
-import java.util.Optional;
-
-@SuppressWarnings({"java:S1118", "java:S1610"})
+@SuppressWarnings("java:S1118")
 @Mixin(GameRenderer.class)
 public abstract class MixinGameRenderer {
 
     @Inject(method = "getNightVisionScale", at = @At("HEAD"), cancellable = true)
     private static void getNightVisionScale(LivingEntity livingEntityIn, float entitylivingbaseIn, CallbackInfoReturnable<Float> cir) {
-        int i = Optional.ofNullable(livingEntityIn.getEffect(MobEffects.NIGHT_VISION))
-            .map(MobEffectInstance::getDuration).orElse(0);
-
-        cir.setReturnValue(i > FlickerFix.fadeTicks ? FlickerFix.brightness : i * FlickerFix.fadeRate);
+        MobEffectInstance instance = livingEntityIn.getEffect(MobEffects.NIGHT_VISION);
+        if (instance != null && !instance.isInfiniteDuration()) {
+            int i = instance.getDuration();
+            cir.setReturnValue(i > FlickerFix.fadeTicks ? FlickerFix.brightness : i * FlickerFix.fadeRate);
+        }
     }
 }
diff --git a/src/main/resources/META-INF/mods.toml b/src/main/resources/META-INF/mods.toml
index ab0dcf8..48ea379 100644
--- a/src/main/resources/META-INF/mods.toml
+++ b/src/main/resources/META-INF/mods.toml
@@ -6,7 +6,7 @@
 # The name of the mod loader type to load - for regular FML @Mod mods it should be javafml
 modLoader="javafml" #mandatory
 # A version range to match for said mod loader - for regular FML @Mod it will be the forge version
-loaderVersion="[46,)" #mandatory This is typically bumped every Minecraft version by Forge. See our download page for lists of versions.
+loaderVersion="[47,)" #mandatory This is typically bumped every Minecraft version by Forge. See our download page for lists of versions.
 # The license for you mod. This is mandatory metadata and allows for easier comprehension of your redistributive properties.
 # Review your options at https://choosealicense.com/. All rights reserved is the default copyright stance, and is thus the default here.
 license="All rights reserved"
@@ -33,7 +33,7 @@ Disables nightvision flickering when duration goes below 10 seconds.
     # Does this dependency have to exist - if not, ordering below must be specified
     mandatory=true #mandatory
     # The version range of the dependency
-    versionRange="[46,)" #mandatory
+    versionRange="[47,)" #mandatory
     # An ordering relationship for the dependency - BEFORE or AFTER required if the relationship is not mandatory
     ordering="NONE"
     # Side this dependency is applied on - BOTH, CLIENT or SERVER