diff --git a/esphome/components/script/__init__.py b/esphome/components/script/__init__.py
index 483357f85b..16b1d4c54e 100644
--- a/esphome/components/script/__init__.py
+++ b/esphome/components/script/__init__.py
@@ -88,7 +88,7 @@ def validate_parameter_name(value):
     raise cv.Invalid(f"Script's parameter name cannot be {CONF_ID}")
 
 
-ALLOWED_PARAM_TYPE_CHARSET = set("abcdefghijklmnopqrstuvwxyz0123456789_:*&[]")
+ALLOWED_PARAM_TYPE_CHARSET = set("abcdefghijklmnopqrstuvwxyz0123456789_:*&[]<>")
 
 
 def validate_parameter_type(value):