diff --git a/docs/api.md b/docs/api.md
index f49cad33..082a7c01 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -217,7 +217,7 @@ By convention options are defined in `Options.py` and will be used when parsing
 the players' yaml files.
 
 Each option has its own class, inherits from a base option type, has a docstring 
-to describe it and a `displayname` property for display on the website and in
+to describe it and a `display_name` property for display on the website and in
 spoiler logs.
 
 The actual name as used in the yaml is defined in a `dict[str, Option]`, that is
@@ -263,7 +263,7 @@ import typing
 
 class Difficulty(Choice):
     """Sets overall game difficulty."""
-    displayname = "Difficulty"
+    display_name = "Difficulty"
     option_easy = 0
     option_normal = 1
     option_hard = 2
@@ -273,14 +273,14 @@ class Difficulty(Choice):
 
 class FinalBossHP(Range):
     """Sets the HP of the final boss"""
-    displayname = "Final Boss HP"
+    display_name = "Final Boss HP"
     range_start = 100
     range_end = 10000
     default = 2000
 
 class FixXYZGlitch(Toggle):
     """Fixes ABC when you do XYZ"""
-    displayname = "Fix XYZ Glitch"
+    display_name = "Fix XYZ Glitch"
 
 # By convention we call the options dict variable `<world>_options`.
 mygame_options: typing.Dict[str, type(Option)] = {