diff --git a/packages/scatterplot/index.d.ts b/packages/scatterplot/index.d.ts
index 93a3da4c11..fb157c3c7c 100644
--- a/packages/scatterplot/index.d.ts
+++ b/packages/scatterplot/index.d.ts
@@ -84,7 +84,10 @@ declare module '@nivo/scatterplot' {
         sizes: [number, number]
     }
 
-    export type CustomTooltip = ({ node: Node }) => React.ReactNode
+    export interface TooltipProps {
+        node: Node
+    }
+    export type CustomTooltip = (props: TooltipProps) => React.ReactNode
 
     type Scale = (value: Value) => number
 
diff --git a/tsconfig.json b/tsconfig.json
index 7b74480d57..8eeeedb4bf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,7 +7,8 @@
     "sourceMap": true,
     "jsx": "react",
     "moduleResolution": "node",
-    "esModuleInterop": true
+    "esModuleInterop": true,
+    "noImplicitAny": true
   },
   "include": ["./packages/*/index.d.ts"]
 }