diff --git a/toml/src/main/jflex/com/fasterxml/jackson/dataformat/toml/toml.jflex b/toml/src/main/jflex/com/fasterxml/jackson/dataformat/toml/toml.jflex
index 96c75949..b2854fa3 100644
--- a/toml/src/main/jflex/com/fasterxml/jackson/dataformat/toml/toml.jflex
+++ b/toml/src/main/jflex/com/fasterxml/jackson/dataformat/toml/toml.jflex
@@ -8,6 +8,7 @@ package com.fasterxml.jackson.dataformat.toml;
 %line
 %column
 %char
+%buffer 4000
 
 %ctorarg JacksonTomlParseException.ErrorContext errorContext