diff --git a/build.gradle b/build.gradle
index c3e61f8d..2a1bb796 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,9 +17,9 @@ configure(
     dependencies {
         library 'com.github.JnCrMx:discord-game-sdk4j:v0.5.5'
 
-        library 'com.fasterxml.jackson.core:jackson-core:2.20.0'
-        library 'com.fasterxml.jackson.core:jackson-annotations:2.20'
-        library 'com.fasterxml.jackson.core:jackson-databind:2.20'
+        library 'com.fasterxml.jackson.core:jackson-core:2.8.8'
+        library 'com.fasterxml.jackson.core:jackson-annotations:2.8.8'
+        library 'com.fasterxml.jackson.core:jackson-databind:2.8.8'
 
         testImplementation 'org.junit.jupiter:junit-jupiter-api:5.9.1'
         testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.9.1'
diff --git a/common/src/main/java/io/github/kurrycat/mpkmod/compatibility/MCClasses/Player.java b/common/src/main/java/io/github/kurrycat/mpkmod/compatibility/MCClasses/Player.java
index 793156d3..2bc6ba9f 100644
--- a/common/src/main/java/io/github/kurrycat/mpkmod/compatibility/MCClasses/Player.java
+++ b/common/src/main/java/io/github/kurrycat/mpkmod/compatibility/MCClasses/Player.java
@@ -52,7 +52,8 @@ public class Player {
     public String lastTiming = "None";
     public boolean sprinting = false;
     public BoundingBox3D boundingBox = null;
-
+    public String sidestep = "None";
+    public boolean wadStart = false;
 
     @InfoString.Getter
     public static LandingBlock getLatestLB() {
@@ -66,7 +67,7 @@ public static LandingBlock getLatestLB() {
     public static List<String> compressedInputHistory() {
         return getInputHistory().stream()
                 .reduce(new ArrayList<Tuple<Integer, TimingInput>>(), (l, t) -> {
-                    if (l.size() == 0) {
+                    if (l.isEmpty()) {
                         l.add(new Tuple<>(1, t));
                         return l;
                     }
@@ -272,6 +273,7 @@ public Player buildAndSave() {
             return this;
         }
 
+        //Blip
         lastBlip = prev.lastBlip;
         if (onGround && !prev.onGround && pos.getY() == prev.pos.getY() && !prev.jumpTick) {
             if (lastBlip == null) lastBlip = new Blip(1, pos);
@@ -280,6 +282,24 @@ public Player buildAndSave() {
             if (lastBlip != null) lastBlip = new Blip(0, lastBlip.lastChainedBlips, lastBlip.pos);
         }
 
+        //Sidestep
+        sidestep = prev.sidestep;
+        wadStart = prev.wadStart;
+        if (jumpTick) {
+            if (prev.keyInput.isMovingSideways() && keyInput.isMovingSideways() && prev.keyInput.hasSwappedDirection(keyInput)) {
+                sidestep = "WDWA";
+            } else if (prev.keyInput.isMovingSideways() && !keyInput.isMovingSideways()) {
+                sidestep = "None";
+                wadStart = true;
+            } else {
+                sidestep = "None";
+                wadStart = false;
+            }
+        } else if (wadStart && keyInput.isMovingSideways()) {
+            sidestep = airtime == 1 ? "WAD" : "WAD " + airtime + "t";
+            wadStart = false;
+        }
+
         Player.updateDisplayInstance();
         return this;
     }
@@ -366,6 +386,11 @@ public Player setLastPos(Vector3D lastPos) {
         return this;
     }
 
+    @InfoString.Getter
+    public String getSidestep() {
+        return sidestep;
+    }
+
     @InfoString.DataClass
     public static class Blip implements FormatDecimals {
         @InfoString.Field
@@ -484,5 +509,9 @@ public Vector2D getMovementVector() {
         public boolean isMovingSideways() {
             return left ^ right;
         }
+
+        public boolean hasSwappedDirection(KeyInput other) {
+            return (this.left && other.right) || (this.right && other.left);
+        }
     }
 }
diff --git a/common/src/main/java/io/github/kurrycat/mpkmod/save/Serializer.java b/common/src/main/java/io/github/kurrycat/mpkmod/save/Serializer.java
index 0d9c21d7..9cb0d521 100644
--- a/common/src/main/java/io/github/kurrycat/mpkmod/save/Serializer.java
+++ b/common/src/main/java/io/github/kurrycat/mpkmod/save/Serializer.java
@@ -30,8 +30,7 @@ public static void registerSerializer() {
         module.addDeserializer(Color.class, new ColorDeserializer());
 
         mapper.registerModule(module);
-        mapper.activateDefaultTyping(
-                mapper.getPolymorphicTypeValidator(),
+        mapper.enableDefaultTyping(
                 ObjectMapper.DefaultTyping.OBJECT_AND_NON_CONCRETE,
                 JsonTypeInfo.As.PROPERTY
         );