diff --git a/react/react-global.d.ts b/react/react-global.d.ts
index 58ff14f39..83c2d54a4 100644
--- a/react/react-global.d.ts
+++ b/react/react-global.d.ts
@@ -396,10 +396,14 @@ declare module React {
         zIndex?: number;
         zoom?: number;
 
+        fontSize?: number | string;
+
         // SVG-related properties
         fillOpacity?: number;
         strokeOpacity?: number;
         strokeWidth?: number;
+
+        [propertyName: string]: string | number | boolean;
     }
 
     interface HTMLAttributes extends DOMAttributes {
diff --git a/react/react.d.ts b/react/react.d.ts
index 671b23784..f6dd25511 100644
--- a/react/react.d.ts
+++ b/react/react.d.ts
@@ -396,10 +396,14 @@ declare module __React {
         zIndex?: number;
         zoom?: number;
 
+        fontSize?: number | string;
+
         // SVG-related properties
         fillOpacity?: number;
         strokeOpacity?: number;
         strokeWidth?: number;
+
+        [propertyName: string]: string | number | boolean;
     }
 
     interface HTMLAttributes extends DOMAttributes {