diff --git a/packages/common-lib/src/formatters/formatUnit.ts b/packages/common-lib/src/formatters/formatUnit.ts
index b7088ff..d518c59 100644
--- a/packages/common-lib/src/formatters/formatUnit.ts
+++ b/packages/common-lib/src/formatters/formatUnit.ts
@@ -1,4 +1,4 @@
-import { roundTo } from '../math/roundTo';
+import { roundTo } from '../math/roundTo.js';
 
 export type Unit = {
   value: number;
diff --git a/packages/common-lib/src/utilities/errorToString.ts b/packages/common-lib/src/utilities/errorToString.ts
index 0a25459..1645997 100644
--- a/packages/common-lib/src/utilities/errorToString.ts
+++ b/packages/common-lib/src/utilities/errorToString.ts
@@ -1,3 +1,3 @@
-export function errorToString(error: any) {
+export function errorToString(error: Error) {
   return JSON.stringify(error, Object.getOwnPropertyNames(error), 2);
 }