diff --git a/Package.resolved b/Package.resolved
index 9906d8e..02e03ee 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -15,8 +15,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/swiftlang/swift-cmark.git",
       "state" : {
-        "revision" : "b97d09472e847a416629f026eceae0e2afcfad65",
-        "version" : "0.7.0"
+        "revision" : "924936d0427cb25a61169739a7660230bffa6ea6",
+        "version" : "0.8.0"
       }
     },
     {
@@ -24,8 +24,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-markdown",
       "state" : {
-        "revision" : "7d9a5ce307528578dfa777d505496bd5f544ad94",
-        "version" : "0.7.3"
+        "revision" : "3c6f9523da3a1ec2fd829673e472d95b8097a3b8",
+        "version" : "0.8.0"
       }
     },
     {
diff --git a/Package.swift b/Package.swift
index 46f480e..47ca5e2 100644
--- a/Package.swift
+++ b/Package.swift
@@ -20,7 +20,7 @@ let package = Package(
     )
   ],
   dependencies: [
-    .package(url: "https://github.com/apple/swift-markdown", from: "0.5.0"),
+    .package(url: "https://github.com/apple/swift-markdown", from: "0.8.0"),
     .package(url: "https://github.com/apple/swift-algorithms", from: "1.0.0"),
   ],
   targets: [
diff --git a/Sources/MarkdownView/Contents/ListItemContent.swift b/Sources/MarkdownView/Contents/ListItemContent.swift
index da5aca7..e4dfe84 100644
--- a/Sources/MarkdownView/Contents/ListItemContent.swift
+++ b/Sources/MarkdownView/Contents/ListItemContent.swift
@@ -17,5 +17,3 @@ public struct ListItemContent: Hashable, Sendable {
     self.children = children
   }
 }
-
-extension Checkbox: @unchecked @retroactive Sendable {}
diff --git a/Sources/MarkdownView/Contents/MarkupContent.swift b/Sources/MarkdownView/Contents/MarkupContent.swift
index cd80bdc..acccb17 100644
--- a/Sources/MarkdownView/Contents/MarkupContent.swift
+++ b/Sources/MarkdownView/Contents/MarkupContent.swift
@@ -30,4 +30,4 @@ public enum MarkupContent: Hashable, Sendable {
   case unhandled(content: String)
 }
 
-extension Aside.Kind: @unchecked @retroactive Sendable, @retroactive Hashable {}
+extension Aside.Kind: @retroactive Hashable {}