diff --git a/packages/front-end/src/types/global.d.ts b/packages/front-end/src/types/global.d.ts
new file mode 100644
index 0000000000..a363ba0706
--- /dev/null
+++ b/packages/front-end/src/types/global.d.ts
@@ -0,0 +1,3 @@
+declare module "black-scholes";
+declare module "greeks";
+declare module "implied-volatility";