diff --git a/src/main/java/com/falsepattern/lib/compat/GuiLabel.java b/src/main/java/com/falsepattern/lib/compat/GuiLabel.java
index 7bd88c0..bc50b5b 100644
--- a/src/main/java/com/falsepattern/lib/compat/GuiLabel.java
+++ b/src/main/java/com/falsepattern/lib/compat/GuiLabel.java
@@ -1,5 +1,6 @@
 package com.falsepattern.lib.compat;
 
+import com.falsepattern.lib.StableAPI;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import java.util.ArrayList;
@@ -18,6 +19,7 @@ import org.lwjgl.opengl.GL11;
  * A functional equivalent to GuiLabel present in Minecraft 1.12.
  */
 @SideOnly(Side.CLIENT)
+@StableAPI(since = "0.8.0")
 public class GuiLabel extends Gui {
     private final List<String> lines = new ArrayList<>();
     private final FontRenderer fontRenderer;
diff --git a/src/main/java/com/falsepattern/lib/mixin/IMixin.java b/src/main/java/com/falsepattern/lib/mixin/IMixin.java
index 6b94bc1..5e816c8 100644
--- a/src/main/java/com/falsepattern/lib/mixin/IMixin.java
+++ b/src/main/java/com/falsepattern/lib/mixin/IMixin.java
@@ -1,11 +1,13 @@
 package com.falsepattern.lib.mixin;
 
+import com.falsepattern.lib.StableAPI;
 import cpw.mods.fml.relauncher.FMLLaunchHandler;
 import java.util.List;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 import lombok.val;
 
+@StableAPI(since = "0.8.0")
 public interface IMixin {
 
     String getMixin();
diff --git a/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java b/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
index 7ba4459..2042c81 100644
--- a/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
+++ b/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
@@ -1,5 +1,6 @@
 package com.falsepattern.lib.mixin;
 
+import com.falsepattern.lib.StableAPI;
 import com.falsepattern.lib.internal.CoreLoadingPlugin;
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -20,6 +21,7 @@ import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
 
 import static java.nio.file.Files.walk;
 
+@StableAPI(since = "0.8.0")
 public interface IMixinPlugin extends IMixinConfigPlugin {
     Path MODS_DIRECTORY_PATH = CoreLoadingPlugin.mcDir.toPath().resolve("mods");
 
diff --git a/src/main/java/com/falsepattern/lib/mixin/ITargetedMod.java b/src/main/java/com/falsepattern/lib/mixin/ITargetedMod.java
index 73cd814..e5a9067 100644
--- a/src/main/java/com/falsepattern/lib/mixin/ITargetedMod.java
+++ b/src/main/java/com/falsepattern/lib/mixin/ITargetedMod.java
@@ -1,9 +1,11 @@
 package com.falsepattern.lib.mixin;
 
+import com.falsepattern.lib.StableAPI;
 import com.google.common.io.Files;
 import java.nio.file.Path;
 import java.util.function.Predicate;
 
+@StableAPI(since = "0.8.0")
 public interface ITargetedMod {
 
     String getModName();
diff --git a/src/main/java/com/falsepattern/lib/util/RenderUtil.java b/src/main/java/com/falsepattern/lib/util/RenderUtil.java
index f678141..c88da19 100644
--- a/src/main/java/com/falsepattern/lib/util/RenderUtil.java
+++ b/src/main/java/com/falsepattern/lib/util/RenderUtil.java
@@ -1,5 +1,6 @@
 package com.falsepattern.lib.util;
 
+import com.falsepattern.lib.StableAPI;
 import cpw.mods.fml.relauncher.ReflectionHelper;
 import cpw.mods.fml.relauncher.SideOnly;
 import lombok.*;
@@ -12,6 +13,7 @@ import static net.minecraft.client.Minecraft.getMinecraft;
 
 @SideOnly(CLIENT)
 @NoArgsConstructor(access = PRIVATE)
+@StableAPI(since = "0.8.0")
 public final class RenderUtil {
     private final static Timer MINECRAFT_TIMER = getMinecraftTimer();