diff --git a/packages/react-dock/package.json b/packages/react-dock/package.json
index c1eb9e99..7eef6c88 100644
--- a/packages/react-dock/package.json
+++ b/packages/react-dock/package.json
@@ -42,7 +42,7 @@
   "devDependencies": {
     "@types/jest": "^29.5.14",
     "@types/react": "^19.1.6",
-    "@types/react-test-renderer": "^18.3.1",
+    "@types/react-test-renderer": "^19.1.0",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
     "react": "^19.1.0",
diff --git a/packages/react-dock/src/Dock.tsx b/packages/react-dock/src/Dock.tsx
index 1a51d381..a4e7c478 100644
--- a/packages/react-dock/src/Dock.tsx
+++ b/packages/react-dock/src/Dock.tsx
@@ -228,12 +228,12 @@ interface Props {
   dockHiddenStyle?: React.CSSProperties | null;
   duration: number;
   children?:
-    | React.FunctionComponent<{
+    | ((params: {
         position: 'left' | 'right' | 'top' | 'bottom';
         isResizing: boolean | undefined;
         size: number;
         isVisible: boolean | undefined;
-      }>
+      }) => ReactNode)
     | ReactNode;
 }
 
@@ -363,14 +363,7 @@ export default class Dock extends Component<Props, State> {
           />
           <div style={styles.dockContent}>
             {typeof children === 'function'
-              ? (
-                  children as React.FunctionComponent<{
-                    position: 'left' | 'right' | 'top' | 'bottom';
-                    isResizing: boolean | undefined;
-                    size: number;
-                    isVisible: boolean | undefined;
-                  }>
-                )({
+              ? children({
                   position,
                   isResizing,
                   size,
diff --git a/packages/react-json-tree/package.json b/packages/react-json-tree/package.json
index 6f134214..cac0452b 100644
--- a/packages/react-json-tree/package.json
+++ b/packages/react-json-tree/package.json
@@ -46,7 +46,7 @@
   "devDependencies": {
     "@types/jest": "^29.5.14",
     "@types/react": "^19.1.6",
-    "@types/react-test-renderer": "^18.3.1",
+    "@types/react-test-renderer": "^19.1.0",
     "jest": "^29.7.0",
     "react": "^19.1.0",
     "react-test-renderer": "^19.1.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ae181591..3ab612b4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -384,8 +384,8 @@ importers:
         specifier: ^19.1.6
         version: 19.1.6
       '@types/react-test-renderer':
-        specifier: ^18.3.1
-        version: 18.3.1
+        specifier: ^19.1.0
+        version: 19.1.0
       jest:
         specifier: ^29.7.0
         version: 29.7.0(@types/node@22.15.21)(babel-plugin-macros@3.1.0)(ts-node@10.9.2(@swc/core@1.11.29(@swc/helpers@0.5.17))(@types/node@22.15.21)(typescript@5.8.3))
@@ -500,8 +500,8 @@ importers:
         specifier: ^19.1.6
         version: 19.1.6
       '@types/react-test-renderer':
-        specifier: ^18.3.1
-        version: 18.3.1
+        specifier: ^19.1.0
+        version: 19.1.0
       jest:
         specifier: ^29.7.0
         version: 29.7.0(@types/node@22.15.21)(babel-plugin-macros@3.1.0)(ts-node@10.9.2(@swc/core@1.11.29(@swc/helpers@0.5.17))(@types/node@22.15.21)(typescript@5.8.3))
@@ -4987,17 +4987,14 @@ packages:
     peerDependencies:
       '@types/react': ^19.0.0
 
-  '@types/react-test-renderer@18.3.1':
-    resolution: {integrity: sha512-vAhnk0tG2eGa37lkU9+s5SoroCsRI08xnsWFiAXOuPH2jqzMbcXvKExXViPi1P5fIklDeCvXqyrdmipFaSkZrA==}
+  '@types/react-test-renderer@19.1.0':
+    resolution: {integrity: sha512-XD0WZrHqjNrxA/MaR9O22w/RNidWR9YZmBdRGI7wcnWGrv/3dA8wKCJ8m63Sn+tLJhcjmuhOi629N66W6kgWzQ==}
 
   '@types/react-transition-group@4.4.12':
     resolution: {integrity: sha512-8TV6R3h2j7a91c+1DXdJi3Syo69zzIZbz7Lg5tORM5LEJG7X/E6a1V3drRyBRZq7/utz7A+c4OgYLiLcYGHG6w==}
     peerDependencies:
       '@types/react': '*'
 
-  '@types/react@18.3.22':
-    resolution: {integrity: sha512-vUhG0YmQZ7kL/tmKLrD3g5zXbXXreZXB3pmROW8bg3CnLnpjkRVwUlLne7Ufa2r9yJ8+/6B73RzhAek5TBKh2Q==}
-
   '@types/react@19.1.6':
     resolution: {integrity: sha512-JeG0rEWak0N6Itr6QUx+X60uQmN+5t3j9r/OVDtWzFXKaj6kD1BwJzOksD0FF6iWxZlbE1kB0q9vtnU2ekqa1Q==}
 
@@ -12903,19 +12900,14 @@ snapshots:
     dependencies:
       '@types/react': 19.1.6
 
-  '@types/react-test-renderer@18.3.1':
+  '@types/react-test-renderer@19.1.0':
     dependencies:
-      '@types/react': 18.3.22
+      '@types/react': 19.1.6
 
   '@types/react-transition-group@4.4.12(@types/react@19.1.6)':
     dependencies:
       '@types/react': 19.1.6
 
-  '@types/react@18.3.22':
-    dependencies:
-      '@types/prop-types': 15.7.14
-      csstype: 3.1.3
-
   '@types/react@19.1.6':
     dependencies:
       csstype: 3.1.3