diff --git a/typer/models.py b/typer/models.py
index 53fca273b4..93fad3b40d 100644
--- a/typer/models.py
+++ b/typer/models.py
@@ -517,7 +517,9 @@ def __init__(
         pretty_exceptions_enable: bool = True,
         pretty_exceptions_show_locals: bool = True,
         pretty_exceptions_short: bool = True,
+        pretty_exceptions_width: int = 100,
     ) -> None:
         self.pretty_exceptions_enable = pretty_exceptions_enable
         self.pretty_exceptions_show_locals = pretty_exceptions_show_locals
         self.pretty_exceptions_short = pretty_exceptions_short
+        self.pretty_exceptions_width = pretty_exceptions_width