diff --git a/runelite-api/pom.xml b/runelite-api/pom.xml
index 1b2e9d6de4..075a6201c9 100644
--- a/runelite-api/pom.xml
+++ b/runelite-api/pom.xml
@@ -72,7 +72,7 @@
 				<artifactId>maven-jar-plugin</artifactId>
 				<executions>
 					<!-- from JLS 13.1.3: references to a static field that is a constant variable (§4.12.4) must be resolved
-					at compile time to the value denoted by the constant variable's initializer *and* no refernces to the
+					at compile time to the value denoted by the constant variable's initializer *and* no references to the
 					field should be present in the code in a binary file.
 
 					This permits us to remove the classes containing only these types of fields at runtime
@@ -86,6 +86,15 @@
 						<configuration>
 							<classifier>runtime</classifier>
 							<excludes>
+								<exclude>net/runelite/api/widgets/ItemQuantityMode.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetConfig.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetID*.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetModalMode.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetModelType.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetPositionMode.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetSizeMode.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetTextAlignment.class</exclude>
+								<exclude>net/runelite/api/widgets/WidgetType.class</exclude>
 								<exclude>net/runelite/api/clan/ClanID.class</exclude>
 								<exclude>net/runelite/api/AnimationID.class</exclude>
 								<exclude>net/runelite/api/EnumID.class</exclude>
diff --git a/runelite-api/src/main/java/net/runelite/api/widgets/ItemQuantityMode.java b/runelite-api/src/main/java/net/runelite/api/widgets/ItemQuantityMode.java
index 501da0671f..7992558284 100644
--- a/runelite-api/src/main/java/net/runelite/api/widgets/ItemQuantityMode.java
+++ b/runelite-api/src/main/java/net/runelite/api/widgets/ItemQuantityMode.java
@@ -28,7 +28,7 @@ package net.runelite.api.widgets;
 /**
  * Utility class mapping Widget ItemQuantityMode values
  */
-public class ItemQuantityMode
+public final class ItemQuantityMode
 {
 	/**
 	 * Never show item quantity number
diff --git a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetConfig.java b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetConfig.java
index 31829b5417..5cce5db333 100644
--- a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetConfig.java
+++ b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetConfig.java
@@ -32,7 +32,7 @@ import net.runelite.api.MenuAction;
  *
  * @see Widget#getClickMask()
  */
-public class WidgetConfig
+public final class WidgetConfig
 {
 	/**
 	 * Enables displaying a ninth option on a menu.
diff --git a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetID.java b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetID.java
index 0bad099b02..2f785e00e1 100644
--- a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetID.java
+++ b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetID.java
@@ -34,7 +34,7 @@ package net.runelite.api.widgets;
  * For a more direct group-child widget mapping, use the
  * {@link WidgetInfo} enum class.
  */
-public class WidgetID
+public final class WidgetID
 {
 	public static final int FAIRY_RING_PANEL_GROUP_ID = 381;
 	public static final int FAIRY_RING_GROUP_ID = 398;
diff --git a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModalMode.java b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModalMode.java
index 9c875fa3fd..7f0b179bbc 100644
--- a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModalMode.java
+++ b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModalMode.java
@@ -24,7 +24,7 @@
  */
 package net.runelite.api.widgets;
 
-public class WidgetModalMode
+public final class WidgetModalMode
 {
 	public static final int MODAL_NOCLICKTHROUGH = 0;
 	public static final int NON_MODAL = 1;
diff --git a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModelType.java b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModelType.java
index ff68eef617..a04c0cfdab 100644
--- a/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModelType.java
+++ b/runelite-api/src/main/java/net/runelite/api/widgets/WidgetModelType.java
@@ -24,7 +24,7 @@
  */
 package net.runelite.api.widgets;
 
-public class WidgetModelType
+public final class WidgetModelType
 {
 	public static final int NULL = 0;
 	public static final int MODEL = 1;