diff --git a/package-lock.json b/package-lock.json
index fc1a7be..7949108 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,6 +27,7 @@
         "@commitlint/cli": "^11.0.0",
         "@commitlint/config-conventional": "^11.0.0",
         "@map-colonies/eslint-config": "^4.0.0",
+        "@map-colonies/tsconfig": "^1.0.0",
         "@types/config": "^3.3.4",
         "@types/debug": "^4.1.12",
         "@types/jest": "^29.5.12",
@@ -3128,6 +3129,16 @@
       "license": "MIT",
       "peer": true
     },
+    "node_modules/@map-colonies/tsconfig": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@map-colonies/tsconfig/-/tsconfig-1.0.0.tgz",
+      "integrity": "sha512-POVvNJXvlnw7WxxL69Pz1qutn6EiCoCqYpB0304IwGjvNGMi2UqhTvroA/GruXX9rzkVfGp8IGn4kxO5m0kCcQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@nicolo-ribaudo/eslint-scope-5-internals": {
       "version": "5.1.1-v1",
       "resolved": "https://registry.npmjs.org/@nicolo-ribaudo/eslint-scope-5-internals/-/eslint-scope-5-internals-5.1.1-v1.tgz",
diff --git a/package.json b/package.json
index 405d150..2c31e0d 100644
--- a/package.json
+++ b/package.json
@@ -88,6 +88,7 @@
     "ts-jest": "^29.1.5",
     "typescript": "^5.4.5",
     "prom-client": "^15.0.0",
-    "jest-extended": "^4.0.2"
+    "jest-extended": "^4.0.2",
+    "@map-colonies/tsconfig": "^1.0.0"
   }
 }
diff --git a/src/env.ts b/src/env.ts
index cc53820..0fed720 100644
--- a/src/env.ts
+++ b/src/env.ts
@@ -53,7 +53,7 @@ function parseSchemaEnv(schema: JSONSchema): EnvMap {
         debug('going over object properties at path %s', key, path);
         const subSchema = schema.properties[key];
 
-        if (typeof subSchema !== 'boolean') {
+        if (typeof subSchema !== 'boolean' && subSchema !== undefined) {
           iterateOverSchemaObject(subSchema, path === '' ? key : `${path}.${key}`);
         }
       }
diff --git a/src/index.ts b/src/index.ts
index ba7c5cc..7d77add 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,3 @@
-export { ConfigOptions, ConfigInstance } from './types';
+export type { ConfigOptions, ConfigInstance } from './types';
 export { config } from './config';
-export { ConfigErrors, isConfigError, ConfigError } from './errors';
+export { type ConfigErrors, isConfigError, ConfigError } from './errors';
diff --git a/src/options.ts b/src/options.ts
index 5b1796c..6ef024d 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -38,7 +38,7 @@ export function initializeOptions(options: Partial<BaseOptions>): BaseOptions {
   const [errors, validatedOptions] = validate(ajvOptionsValidator, optionsSchema, mergedOptions);
 
   if (errors) {
-    debug('error validating options: %s', errors[0].message);
+    debug('error validating options: %s', errors[0] !== undefined ? errors[0].message : 'unknown error');
     throw createConfigError(
       'optionValidationError',
       'An error occurred while validating the given options. please check both arguments and environment variables',
diff --git a/src/schemas.ts b/src/schemas.ts
index fafb65f..ad6024b 100644
--- a/src/schemas.ts
+++ b/src/schemas.ts
@@ -36,6 +36,10 @@ export async function loadSchema(schema: JSONSchema): ReturnType<typeof refParse
         read: (file: { url: string; hash: string; extension: string }) => {
           const subPath = file.url.split(SCHEMA_DOMAIN)[1];
 
+          if (subPath === undefined) {
+            throw createConfigError(`schemaNotFoundError`, `Schema url is not valid`, { schemaPath: file.url });
+          }
+
           return loadSpecificSchema(subPath);
         },
       },
diff --git a/tsconfig.json b/tsconfig.json
index ed338ea..5007944 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,19 +1,5 @@
 {
-  "compilerOptions": {
-    "target": "ES2022",
-    "allowSyntheticDefaultImports": true,
-    "strict": true,
-    "module": "NodeNext",
-    "esModuleInterop": true,
-    "moduleResolution": "NodeNext",
-    "resolveJsonModule": true,
-    "outDir": "dist",
-    "sourceMap": true,
-    "declaration": true,
-    "declarationMap": true,
-    "noEmit": true,
-    "strictNullChecks": true
-  },
+  "extends": "@map-colonies/tsconfig/tsconfig-library",
   "include": ["src"],
   "exclude": ["dist", "node_modules"]
 }