diff --git a/gptc/model.py b/gptc/model.py
index faedaef..aa00f5a 100644
--- a/gptc/model.py
+++ b/gptc/model.py
@@ -77,22 +77,12 @@ class Model:
         }
 
     def serialize(self, file: BinaryIO):
-        file.write(b"GPTC model v4\n")
+        file.write(b"GPTC model v5\n")
         file.write(
             json.dumps(
                 {
                     "names": self.names,
                     "max_ngram_length": self.max_ngram_length,
-                    "has_emoji": True,
-                    # Due to an oversight in development, version 3.0.0 still
-                    # had the code used to make emoji support optional, even
-                    # though the `emoji` library was made a hard dependency.
-                    # Part of this code checked whether or not the model
-                    # supports emoji; deserialization would not work in 3.0.0
-                    # if the model was compiled without this field. Emoji are
-                    # always supported with 3.0.0 and newer when GPTC has been
-                    # installed correctly, so this value should always be True.
-                    # Related: #11
                 }
             ).encode("utf-8")
             + b"\n"
@@ -106,7 +96,7 @@ class Model:
 
 def deserialize(encoded_model: BinaryIO) -> Model:
     prefix = encoded_model.read(14)
-    if prefix != b"GPTC model v4\n":
+    if prefix != b"GPTC model v5\n":
         raise InvalidModelError()
 
     config_json = b""