diff --git a/build.gradle b/build.gradle
index 2a2dcb734..afe53196b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,7 +14,7 @@ buildscript {
 apply plugin: 'net.minecraftforge.gradle.forge'
 apply plugin: 'idea'
 
-version = "1.9.4-r42"
+version = "1.9.4-r43"
 group = "de.ellpeck.actuallyadditions"
 archivesBaseName = "ActuallyAdditions"
 
diff --git a/update/changelog.md b/update/changelog.md
index eeb05fd34..1e70305fe 100644
--- a/update/changelog.md
+++ b/update/changelog.md
@@ -1,3 +1,12 @@
+# 1.9.4-r43
+### This update increases the performance of some blocks by a significant bit. If you are experiencing lag in a world with many Laser Relays, install this.
+* More proper laser relay bounding boxes
+* Significantly upped the performance of Item Laser Relays
+* Increased ESD performance
+* Made Energy Laser Relays less performance intensive
+* Changed energy handling system a bit, should be the same in-game
+* Made coal and oil generator not randomly appear to be on even though they're not
+
 # 1.9.4-r42
 ### The shut-up-about-EnderIO Update.
 * Changed ESD to allow higher numbers of slots and have no limit on input values so that you can basically make it pull from infintely many slots if the amount of slots present is able to change
diff --git a/update/updateVersions.properties b/update/updateVersions.properties
index 23c687e13..660750897 100644
--- a/update/updateVersions.properties
+++ b/update/updateVersions.properties
@@ -1,4 +1,4 @@
 1.7.10=21
 1.8.9=26
 1.9=33
-1.9.4=42
\ No newline at end of file
+1.9.4=43
\ No newline at end of file