diff --git a/.changeset/gentle-bikes-float.md b/.changeset/gentle-bikes-float.md
new file mode 100644
index 00000000..da8295d0
--- /dev/null
+++ b/.changeset/gentle-bikes-float.md
@@ -0,0 +1,5 @@
+---
+'markdown-to-jsx': patch
+---
+
+Use `ReactNode` instead of `ReactChild` for React 19 compatibility
diff --git a/.yarn/cache/@esbuild-darwin-x64-npm-0.19.11-cbbb06eafc-10.zip b/.yarn/cache/@esbuild-darwin-x64-npm-0.19.11-cbbb06eafc-10.zip
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index 00000000..779527e7
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diff --git a/.yarn/cache/@esbuild-win32-x64-npm-0.19.11-45828b663c-10.zip b/.yarn/cache/@esbuild-win32-x64-npm-0.19.11-45828b663c-10.zip
new file mode 100644
index 00000000..afc30edb
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diff --git a/.yarn/cache/fsevents-patch-19706e7e35-10.zip b/.yarn/cache/fsevents-patch-19706e7e35-10.zip
new file mode 100644
index 00000000..aff1ab12
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diff --git a/.yarnrc.yml b/.yarnrc.yml
index 9b24c1e9..070415b0 100644
--- a/.yarnrc.yml
+++ b/.yarnrc.yml
@@ -5,3 +5,9 @@ enableGlobalCache: false
 nodeLinker: node-modules
 
 yarnPath: .yarn/releases/yarn-4.5.1.cjs
+
+supportedArchitectures:
+  os:
+    - linux
+    - win32
+    - darwin
diff --git a/index.tsx b/index.tsx
index a2ea4e90..78be45ae 100644
--- a/index.tsx
+++ b/index.tsx
@@ -1053,7 +1053,7 @@ function reactFor(render) {
   return function patchedRender(
     ast: MarkdownToJSX.ParserResult | MarkdownToJSX.ParserResult[],
     state: MarkdownToJSX.State = {}
-  ): React.ReactChild[] {
+  ): React.ReactNode[] {
     if (Array.isArray(ast)) {
       const oldKey = state.key
       const result = []
@@ -1094,7 +1094,7 @@ function createRenderer(
     ast: MarkdownToJSX.ParserResult,
     render: MarkdownToJSX.RuleOutput,
     state: MarkdownToJSX.State
-  ): React.ReactChild {
+  ): React.ReactNode {
     const renderer = rules[ast.type].render as MarkdownToJSX.Rule['render']
 
     return userRender
@@ -2292,7 +2292,7 @@ export namespace MarkdownToJSX {
        */
       render: RuleOutput,
       state?: MarkdownToJSX.State
-    ) => React.ReactChild
+    ) => React.ReactNode
   }
 
   export type Rules = {
@@ -2321,8 +2321,8 @@ export namespace MarkdownToJSX {
     createElement: (
       tag: Parameters<CreateElement>[0],
       props: React.JSX.IntrinsicAttributes,
-      ...children: React.ReactChild[]
-    ) => React.ReactChild
+      ...children: React.ReactNode[]
+    ) => React.ReactNode
 
     /**
      * The library automatically generates an anchor tag for bare URLs included in the markdown
@@ -2414,14 +2414,14 @@ export namespace MarkdownToJSX {
      */
     renderRule: (
       /** Resume normal processing, call this function as a fallback if you are not returning custom JSX. */
-      next: () => React.ReactChild,
+      next: () => React.ReactNode,
       /** the current AST node, use `RuleType` against `node.type` for identification */
       node: ParserResult,
       /** use as `renderChildren(node.children)` for block nodes */
       renderChildren: RuleOutput,
       /** contains `key` which should be supplied to the topmost JSX element */
       state: State
-    ) => React.ReactChild
+    ) => React.ReactNode
 
     /**
      * Override the built-in sanitizer function for URLs, etc if desired. The built-in version is available as a library export called `sanitizer`.