diff --git a/hal/src/main/java/edu/wpi/first/hal/util/AllocationException.java b/hal/src/main/java/edu/wpi/first/hal/util/AllocationException.java
index 6f789d8640..42e20592d8 100644
--- a/hal/src/main/java/edu/wpi/first/hal/util/AllocationException.java
+++ b/hal/src/main/java/edu/wpi/first/hal/util/AllocationException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -10,6 +10,7 @@ package edu.wpi.first.hal.util;
 /**
  * Exception indicating that the resource is already allocated.
  */
+@SuppressWarnings("serial")
 public class AllocationException extends RuntimeException {
   /**
    * Create a new AllocationException.
diff --git a/hal/src/main/java/edu/wpi/first/hal/util/BoundaryException.java b/hal/src/main/java/edu/wpi/first/hal/util/BoundaryException.java
index 8f21e60417..8fef4c972f 100644
--- a/hal/src/main/java/edu/wpi/first/hal/util/BoundaryException.java
+++ b/hal/src/main/java/edu/wpi/first/hal/util/BoundaryException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -10,6 +10,7 @@ package edu.wpi.first.hal.util;
 /**
  * This exception represents an error in which a lower limit was set as higher than an upper limit.
  */
+@SuppressWarnings("serial")
 public class BoundaryException extends RuntimeException {
   /**
    * Create a new exception with the given message.
diff --git a/hal/src/main/java/edu/wpi/first/hal/util/CheckedAllocationException.java b/hal/src/main/java/edu/wpi/first/hal/util/CheckedAllocationException.java
index f17e381ffd..d9a8a806bd 100644
--- a/hal/src/main/java/edu/wpi/first/hal/util/CheckedAllocationException.java
+++ b/hal/src/main/java/edu/wpi/first/hal/util/CheckedAllocationException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -11,6 +11,7 @@ package edu.wpi.first.hal.util;
  * Exception indicating that the resource is already allocated This is meant to be thrown by the
  * resource class.
  */
+@SuppressWarnings("serial")
 public class CheckedAllocationException extends Exception {
   /**
    * Create a new CheckedAllocationException.
diff --git a/hal/src/main/java/edu/wpi/first/hal/util/HalHandleException.java b/hal/src/main/java/edu/wpi/first/hal/util/HalHandleException.java
index 874b07ab45..2a7dc9caf5 100644
--- a/hal/src/main/java/edu/wpi/first/hal/util/HalHandleException.java
+++ b/hal/src/main/java/edu/wpi/first/hal/util/HalHandleException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -10,6 +10,7 @@ package edu.wpi.first.hal.util;
 /**
  * Exception indicating that an error has occured with a HAL Handle.
  */
+@SuppressWarnings("serial")
 public class HalHandleException extends RuntimeException {
   /**
    * Create a new HalHandleException.
diff --git a/hal/src/main/java/edu/wpi/first/hal/util/UncleanStatusException.java b/hal/src/main/java/edu/wpi/first/hal/util/UncleanStatusException.java
index 3a3e217d02..3d6ab36b7f 100644
--- a/hal/src/main/java/edu/wpi/first/hal/util/UncleanStatusException.java
+++ b/hal/src/main/java/edu/wpi/first/hal/util/UncleanStatusException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -10,6 +10,7 @@ package edu.wpi.first.hal.util;
 /**
  * Exception for bad status codes from the chip object.
  */
+@SuppressWarnings("serial")
 public final class UncleanStatusException extends IllegalStateException {
   private final int m_statusCode;
 
diff --git a/wpilibOldCommands/src/main/java/edu/wpi/first/wpilibj/command/IllegalUseOfCommandException.java b/wpilibOldCommands/src/main/java/edu/wpi/first/wpilibj/command/IllegalUseOfCommandException.java
index 1053f55bbd..4ed7459a5a 100644
--- a/wpilibOldCommands/src/main/java/edu/wpi/first/wpilibj/command/IllegalUseOfCommandException.java
+++ b/wpilibOldCommands/src/main/java/edu/wpi/first/wpilibj/command/IllegalUseOfCommandException.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -18,6 +18,7 @@ package edu.wpi.first.wpilibj.command;
  * it is put into multiple command groups, it is started from outside its command group, or it adds
  * a new child. </p>
  */
+@SuppressWarnings("serial")
 public class IllegalUseOfCommandException extends RuntimeException {
   /**
    * Instantiates an {@link IllegalUseOfCommandException}.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTrigger.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTrigger.java
index f7f98bde71..282a3462e4 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTrigger.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTrigger.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -23,6 +23,7 @@ public class AnalogTrigger implements Sendable, AutoCloseable {
   /**
    * Exceptions dealing with improper operation of the Analog trigger.
    */
+  @SuppressWarnings("serial")
   public static class AnalogTriggerException extends RuntimeException {
     /**
      * Create a new exception with the given message.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTriggerOutput.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTriggerOutput.java
index 7635196662..f9fe9509ba 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTriggerOutput.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTriggerOutput.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -44,6 +44,7 @@ public class AnalogTriggerOutput extends DigitalSource implements Sendable {
   /**
    * Exceptions dealing with improper operation of the Analog trigger output.
    */
+  @SuppressWarnings("serial")
   public static class AnalogTriggerOutputException extends RuntimeException {
     /**
      * Create a new exception with the given message.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Relay.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Relay.java
index fde4ef16c4..f379de4be0 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Relay.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Relay.java
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2020 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -33,6 +33,7 @@ public class Relay extends MotorSafety implements Sendable, AutoCloseable {
    * This class represents errors in trying to set relay values contradictory to the direction to
    * which the relay is set.
    */
+  @SuppressWarnings("serial")
   public static class InvalidValueException extends RuntimeException {
     /**
      * Create a new exception with the given message.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/spline/SplineParameterizer.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/spline/SplineParameterizer.java
index 4b7bf95003..15852144a7 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/spline/SplineParameterizer.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/spline/SplineParameterizer.java
@@ -62,6 +62,7 @@ public final class SplineParameterizer {
     }
   }
 
+  @SuppressWarnings("serial")
   public static class MalformedSplineException extends RuntimeException {
     /**
      * Create a new exception with the given message.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryGenerator.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryGenerator.java
index a036de100e..cc1df38c80 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryGenerator.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryGenerator.java
@@ -232,6 +232,7 @@ public final class TrajectoryGenerator {
   }
 
   // Work around type erasure signatures
+  @SuppressWarnings("serial")
   public static class ControlVectorList extends ArrayList<Spline.ControlVector> {
     public ControlVectorList(int initialCapacity) {
       super(initialCapacity);
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryParameterizer.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryParameterizer.java
index e2bda033fa..3b1d2aff23 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryParameterizer.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/trajectory/TrajectoryParameterizer.java
@@ -309,6 +309,7 @@ public final class TrajectoryParameterizer {
     }
   }
 
+  @SuppressWarnings("serial")
   public static class TrajectoryGenerationException extends RuntimeException {
     public TrajectoryGenerationException(String message) {
       super(message);