diff --git a/build.gradle b/build.gradle
index d4aa9bff7f..69fed5331a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ plugins {
 	id 'net.fabricmc.filament' version '0.3.0'
 }
 
-def minecraft_version = "1.17-pre3"
+def minecraft_version = "1.17-pre4"
 
 def ENV = System.getenv()
 // Fetch build number from Github Actions
diff --git a/mappings/net/minecraft/client/gui/screen/CreditsScreen.mapping b/mappings/net/minecraft/client/gui/screen/CreditsScreen.mapping
index 5992ff9b24..236774f5b4 100644
--- a/mappings/net/minecraft/client/gui/screen/CreditsScreen.mapping
+++ b/mappings/net/minecraft/client/gui/screen/CreditsScreen.mapping
@@ -13,17 +13,15 @@ CLASS net/minecraft/class_445 net/minecraft/client/gui/screen/CreditsScreen
 	FIELD field_2635 speed F
 	FIELD field_32273 CENTERED_LINE_PREFIX Ljava/lang/String;
 	FIELD field_33954 baseSpeed F
-	FIELD field_33955 SEPARATOR_LINE Lnet/minecraft/class_5348;
+	FIELD field_33955 SEPARATOR_LINE Lnet/minecraft/class_2561;
 	FIELD field_33957 SPACE_BAR_SPEED_MULTIPLIER F
 	METHOD <init> (ZLjava/lang/Runnable;)V
 		ARG 1 endCredits
 		ARG 2 finishAction
 	METHOD method_2257 close ()V
 	METHOD method_2258 renderBackground ()V
-	METHOD method_37304 addText (Lnet/minecraft/class_5348;Z)V
-		ARG 1 text
+	METHOD method_37304 addText (Lnet/minecraft/class_2561;Z)V
 		ARG 2 centered
-	METHOD method_37305 addText (Ljava/lang/String;Z)V
+	METHOD method_37305 addText (Ljava/lang/String;)V
 		ARG 1 text
-		ARG 2 centered
 	METHOD method_37306 addEmptyLine ()V
diff --git a/mappings/net/minecraft/world/gen/feature/OreFeature.mapping b/mappings/net/minecraft/world/gen/feature/OreFeature.mapping
index e50be3c6e3..6925bd7121 100644
--- a/mappings/net/minecraft/world/gen/feature/OreFeature.mapping
+++ b/mappings/net/minecraft/world/gen/feature/OreFeature.mapping
@@ -1,6 +1,5 @@
 CLASS net/minecraft/class_3122 net/minecraft/world/gen/feature/OreFeature
-	METHOD method_13629 generateVeinPart (Lnet/minecraft/class_1936;Ljava/util/Random;Lnet/minecraft/class_3124;DDDDDDIIIII)Z
-		ARG 1 world
+	METHOD method_13629 generateVeinPart (Lnet/minecraft/class_5281;Ljava/util/Random;Lnet/minecraft/class_3124;DDDDDDIIIII)Z
 		ARG 2 random
 		ARG 3 config
 		ARG 4 startX