diff --git a/data/pc/1.21.3/proto.yml b/data/pc/1.21.3/proto.yml
index 25ea73f05..da74a0b51 100644
--- a/data/pc/1.21.3/proto.yml
+++ b/data/pc/1.21.3/proto.yml
@@ -2394,8 +2394,22 @@
       x: f64
       y: f64
       z: f64
-      yaw: i8
-      pitch: i8
+      velocityX: f64
+      velocityY: f64
+      velocityZ: f64
+      yaw: f32
+      pitch: f32
+      flags: ["bitfield", [
+         { "name": "relative_x", "size": 1, "signed": false },
+         { "name": "relative_y", "size": 1, "signed": false },
+         { "name": "relative_z", "size": 1, "signed": false },
+         { "name": "relative_yaw", "size": 1, "signed": false },
+         { "name": "relative_pitch", "size": 1, "signed": false },
+         { "name": "relative_velocity_x", "size": 1, "signed": false },
+         { "name": "relative_velocity_y", "size": 1, "signed": false },
+         { "name": "relative_velocity_z", "size": 1, "signed": false },
+         { "name": "rotate_velocity", "size": 1, "signed": false }
+      ]]
       onGround: bool
    # MC: ClientboundTickingStatePacket
    packet_set_ticking_state:
@@ -3223,4 +3237,4 @@
          if arm_animation: packet_arm_animation
          if spectate: packet_spectate
          if block_place: packet_block_place
-         if use_item: packet_use_item
\ No newline at end of file
+         if use_item: packet_use_item
diff --git a/data/pc/1.21.3/protocol.json b/data/pc/1.21.3/protocol.json
index 176125c6d..28d12e58f 100644
--- a/data/pc/1.21.3/protocol.json
+++ b/data/pc/1.21.3/protocol.json
@@ -7366,13 +7366,78 @@
               "name": "z",
               "type": "f64"
             },
+            {
+              "name": "velocityX",
+              "type": "f64"
+            },
+            {
+              "name": "velocityY",
+              "type": "f64"
+            },
+            {
+              "name": "velocityZ",
+              "type": "f64"
+            },
             {
               "name": "yaw",
-              "type": "i8"
+              "type": "f32"
             },
             {
               "name": "pitch",
-              "type": "i8"
+              "type": "f32"
+            },
+            {
+              "name": "flags",
+              "type": [
+                "bitfield",
+                [
+                  {
+                    "name": "relative_x",
+                    "size": 1,
+                    "signed": false
+                  },
+                  {
+                    "name": "relative_y",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_z",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_yaw",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_pitch",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_velocity_x",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_velocity_y",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "relative_velocity_z",
+                    "size": 1,
+                    "signed": false
+                  },
+                  { 
+                    "name": "rotate_velocity",
+                    "size": 1,
+                    "signed": false
+                  }
+                ]
+              ]
             },
             {
               "name": "onGround",
@@ -9326,4 +9391,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}