diff --git a/data/pc/1.21.8/proto.yml b/data/pc/1.21.8/proto.yml
index b8759aa2c..5906f926d 100644
--- a/data/pc/1.21.8/proto.yml
+++ b/data/pc/1.21.8/proto.yml
@@ -1273,7 +1273,7 @@
    # MC: ServerboundCookieResponsePacket
    packet_common_cookie_response:
       key: string
-      value: ByteArray
+      value?: ByteArray
    # MC: ServerboundSelectKnownPacks
    # MC: ClientboundSelectKnownPacks
    packet_common_select_known_packs:
diff --git a/data/pc/1.21.8/protocol.json b/data/pc/1.21.8/protocol.json
index b80ba438b..8bfa742c0 100644
--- a/data/pc/1.21.8/protocol.json
+++ b/data/pc/1.21.8/protocol.json
@@ -3403,7 +3403,10 @@
         },
         {
           "name": "value",
-          "type": "ByteArray"
+          "type": [
+            "option",
+            "ByteArray"
+          ]
         }
       ]
     ],