diff --git a/.eslintrc b/.eslintrc
index 62b5f9b..2265528 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -9,8 +9,20 @@
     "sourceType": "module"
   },
   "rules": {
-    "@typescript-eslint/no-unused-vars": ["warn", { "argsIgnorePattern": "^_" }],
-    // Turn off ESLint's no-unused-vars in favor of the TypeScript-specific rule
-    "no-unused-vars": "off"
+    // TypeScript specific rules
+    "@typescript-eslint/explicit-function-return-type": ["warn", { "allowExpressions": true }],
+    "@typescript-eslint/type-annotation-spacing": "error",
+
+    "@typescript-eslint/no-unused-vars": ["error", { "ignoreRestSiblings": true }],
+    "@typescript-eslint/no-shadow": ["warn"],
+    "no-unused-vars": "off",
+    "no-shadow": "off",
+
+    "semi": "error",
+    // Basic JavaScript/ESLint rules
+    "eqeqeq": ["error", "always"],
+    "no-unused-expressions": "warn",
+    "no-return-await": "error",
+    "no-console": ["warn", { "allow": ["warn", "error"] }]    
   }
 }
diff --git a/src/api/execution.ts b/src/api/execution.ts
index cce979e..4ba6b31 100644
--- a/src/api/execution.ts
+++ b/src/api/execution.ts
@@ -20,6 +20,7 @@ import {
   DUNE_CSV_NEXT_OFFSET_HEADER,
   DUNE_CSV_NEXT_URI_HEADER,
 } from "../constants";
+import { Response } from "cross-fetch";
 
 // This class implements all the routes defined in the Dune API Docs: https://dune.com/docs/api/
 export class ExecutionAPI extends Router {
diff --git a/src/utils.ts b/src/utils.ts
index 8ceb1c6..9409c4b 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,6 +1,6 @@
 export const logPrefix = "dune-client:";
 
-export function sleep(seconds: number) {
+export function sleep(seconds: number): Promise<void> {
   return new Promise((resolve) => setTimeout(resolve, seconds * 1000));
 }