diff --git a/docs/config.ld b/docs/config.ld
index b0b9ed32d..bd278528e 100644
--- a/docs/config.ld
+++ b/docs/config.ld
@@ -34,6 +34,7 @@ pretty_topic_names = true -- strips extension from manual filenames, this does n
 
 custom_tags = {
   {"realm", hidden = true},
+  {"deprecated", hidden = true},
   {"internal", hidden = true}
 }
 
diff --git a/docs/css/ldoc.css b/docs/css/ldoc.css
index 7f4c90734..4f590feb1 100644
--- a/docs/css/ldoc.css
+++ b/docs/css/ldoc.css
@@ -537,3 +537,7 @@ a.type {
 	background-color: inherit;
 	padding: 0 8px 0 8px;
 }
+
+.strikethrough {
+	text-decoration: line-through;
+}
diff --git a/docs/templates/ldoc.ltp b/docs/templates/ldoc.ltp
index 95ad3f592..b42ac394c 100644
--- a/docs/templates/ldoc.ltp
+++ b/docs/templates/ldoc.ltp
@@ -14,7 +14,55 @@ function ldoc.url(path)
 end
 
 function ldoc.realm_icon(realm)
-	return "<span class=\"realm " .. (realm or "") .. "\"></span>";
+	return "<span class=\"realm " .. (realm or "") .. "\"></span>"
+end
+
+function ldoc.sidebar_item(item, module)
+	local text = ""
+
+	local deprecated = item.tags.deprecated
+	if deprecated then
+		text = text .. "<span class=\"strikethrough\">"
+	else
+		text = text .. "<span>"
+	end
+
+	text = text .. ldoc.realm_icon(item.tags.realm[1])
+	text = text .. "<a href=\""
+		.. ldoc.ref_to_module(module) .. "#" .. item.name
+		.. "\">"
+
+	if ldoc.is_kind_classmethod(module.kind) then
+		text = text .. item.name:gsub(".+:", "")
+	else
+		text = text .. item.name:gsub(module.name .. ".", "")
+	end
+
+	text = text
+		.. "</a>"
+		.. "</span>"
+	return text
+end
+
+function ldoc.item_header(item)
+	local text = ""
+
+	text = text .. "<a class=\"anchor\">"
+
+	local deprecated = item.tags.deprecated
+	if deprecated then
+		text = text .. "<h1 class=\"strikethrough\">"
+	else
+		text = text .. "<h1>"
+	end
+
+	text = text
+		.. ldoc.realm_icon(item.tags.realm[1])
+		.. ldoc.display_name(item)
+		.. "</h1>"
+		.. "</a>"
+
+	return text
 end
 
 function ldoc.is_kind_classmethod(kind)
diff --git a/docs/templates/module.ltp b/docs/templates/module.ltp
index 6e9e76931..b3903674c 100644
--- a/docs/templates/module.ltp
+++ b/docs/templates/module.ltp
@@ -40,9 +40,14 @@
 	{% for item, _ in pairs(items) do %}
 		<section class="method" id="{{item.name}}">
 			<header>
-				<a class="anchor">
-					<h1>{* ldoc.realm_icon(item.tags.realm[1]) *}</span>{{ldoc.display_name(item)}}</h1>
-				</a>
+				{* ldoc.item_header(item) *}
+
+				{% if item.tags.deprecated then %}
+					<div class="notice warning">
+						<div class="title">Deprecated</div>
+						<p>This API is deprecated and shouldn&#x27;t be used anymore.</p>
+					</div>
+				{% end %}
 
 				{% if (item.tags.internal) then %}
 					<div class="notice error">
diff --git a/docs/templates/sidebar.ltp b/docs/templates/sidebar.ltp
index c3f6dc3dc..322b3fd1f 100644
--- a/docs/templates/sidebar.ltp
+++ b/docs/templates/sidebar.ltp
@@ -59,14 +59,7 @@ end
 								{% for k, v in pairs(currentMod.items) do %}
 									{% if (v.kind == "functions") then %}
 										<li>
-											{* ldoc.realm_icon(v.tags.realm[1]) *}
-											<a href="{* ldoc.ref_to_module(currentMod) *}#{{v.name}}">
-												{% if (ldoc.is_kind_classmethod(currentMod.kind)) then
-													echo((v.name:gsub(".+:", "")))
-												else
-													echo((v.name:gsub(currentMod.name .. ".", "")))
-												end %}
-											</a>
+											{* ldoc.sidebar_item(v, currentMod) *}
 										</li>
 									{% end %}
 								{% end %}
@@ -90,14 +83,7 @@ end
 								{% for k, v in pairs(currentMod.items) do %}
 									{% if (v.kind == "fields" or v.kind == "tables") then %}
 										<li>
-											{* ldoc.realm_icon(v.tags.realm[1]) *}
-											<a href="{* ldoc.ref_to_module(currentMod) *}#{{v.name}}">
-												{% if (ldoc.is_kind_classmethod(currentMod.kind)) then
-													echo((v.name:gsub(".+:", "")))
-												else
-													echo((v.name:gsub(currentMod.name .. ".", "")))
-												end %}
-											</a>
+											{* ldoc.sidebar_item(v, currentMod) *}
 										</li>
 									{% end %}
 								{% end %}