diff --git a/src/main/java/net/fabricmc/loom/build/mixin/AnnotationProcessorInvoker.java b/src/main/java/net/fabricmc/loom/build/mixin/AnnotationProcessorInvoker.java
index cc8ae3f9..99ca5bac 100644
--- a/src/main/java/net/fabricmc/loom/build/mixin/AnnotationProcessorInvoker.java
+++ b/src/main/java/net/fabricmc/loom/build/mixin/AnnotationProcessorInvoker.java
@@ -1,7 +1,7 @@
 /*
  * This file is part of fabric-loom, licensed under the MIT License (MIT).
  *
- * Copyright (c) 2020-2021 FabricMC
+ * Copyright (c) 2020-2022 FabricMC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -89,6 +89,7 @@ public abstract class AnnotationProcessorInvoker<T extends Task> {
 					put(Constants.MixinArguments.OUT_MAP_FILE_NAMED_INTERMEDIARY, MixinMappingsService.getMixinMappingFile(project, sourceSet).getCanonicalPath());
 					put(Constants.MixinArguments.OUT_REFMAP_FILE, getRefmapDestination(task, refmapName));
 					put(Constants.MixinArguments.DEFAULT_OBFUSCATION_ENV, "named:intermediary");
+					put(Constants.MixinArguments.QUIET, "true");
 				}};
 
 			project.getLogger().debug("Outputting refmap to dir: " + getRefmapDestinationDir(task) + " for compile task: " + task);
diff --git a/src/main/java/net/fabricmc/loom/util/Constants.java b/src/main/java/net/fabricmc/loom/util/Constants.java
index a23105da..8cb8bc78 100644
--- a/src/main/java/net/fabricmc/loom/util/Constants.java
+++ b/src/main/java/net/fabricmc/loom/util/Constants.java
@@ -1,7 +1,7 @@
 /*
  * This file is part of fabric-loom, licensed under the MIT License (MIT).
  *
- * Copyright (c) 2016-2021 FabricMC
+ * Copyright (c) 2016-2022 FabricMC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -106,7 +106,7 @@ public class Constants {
 		 * Constants for versions of dependencies.
 		 */
 		public static final class Versions {
-			public static final String MIXIN_COMPILE_EXTENSIONS = "0.4.6";
+			public static final String MIXIN_COMPILE_EXTENSIONS = "0.4.7";
 			public static final String DEV_LAUNCH_INJECTOR = "0.2.1+build.8";
 			public static final String TERMINAL_CONSOLE_APPENDER = "1.2.0";
 			public static final String JETBRAINS_ANNOTATIONS = "23.0.0";
@@ -122,6 +122,7 @@ public class Constants {
 		public static final String OUT_MAP_FILE_NAMED_INTERMEDIARY = "outMapFileNamedIntermediary";
 		public static final String OUT_REFMAP_FILE = "outRefMapFile";
 		public static final String DEFAULT_OBFUSCATION_ENV = "defaultObfuscationEnv";
+		public static final String QUIET = "quiet";
 
 		private MixinArguments() {
 		}