diff --git a/.env.sample b/.env.sample
index 7283f25..ec944a5 100644
--- a/.env.sample
+++ b/.env.sample
@@ -4,6 +4,7 @@ HIGHCHARTS_CDN_URL = https://code.highcharts.com/
 HIGHCHARTS_CORE_SCRIPTS =
 HIGHCHARTS_MODULE_SCRIPTS =
 HIGHCHARTS_INDICATOR_SCRIPTS =
+HIGHCHARTS_CUSTOM_SCRIPTS =
 HIGHCHARTS_FORCE_FETCH = false
 HIGHCHARTS_CACHE_PATH =
 HIGHCHARTS_ADMIN_TOKEN =
diff --git a/README.md b/README.md
index effeb48..eac1953 100644
--- a/README.md
+++ b/README.md
@@ -290,6 +290,7 @@ These variables are set in your environment and take precedence over options fro
 - `HIGHCHARTS_CORE_SCRIPTS`: Highcharts core scripts to fetch (defaults to ``).
 - `HIGHCHARTS_MODULE_SCRIPTS`: Highcharts module scripts to fetch (defaults to ``).
 - `HIGHCHARTS_INDICATOR_SCRIPTS`: Highcharts indicator scripts to fetch (defaults to ``).
+- `HIGHCHARTS_CUSTOM_SCRIPTS`: Custom scripts that you want to fetch, ex. additional maps (defaults to ``).
 - `HIGHCHARTS_FORCE_FETCH`: The flag that determines whether to refetch all scripts after each server rerun (defaults to `false`).
 - `HIGHCHARTS_CACHE_PATH`: In which directory should the fetched Highcharts scripts be placed (defaults to `.cache`).
 - `HIGHCHARTS_ADMIN_TOKEN`: An authentication token that is required to switch the Highcharts version on the server at runtime (defaults to ``).
diff --git a/lib/envs.js b/lib/envs.js
index 885d7f0..4991c7e 100644
--- a/lib/envs.js
+++ b/lib/envs.js
@@ -30,7 +30,7 @@ const v = {
         value
           .split(',')
           .map((value) => value.trim())
-          .filter((value) => filterArray.includes(value))
+          .filter((value) => !filterArray || filterArray.includes(value))
       )
       .transform((value) => (value.length ? value : undefined)),
 
@@ -123,6 +123,7 @@ export const Config = z.object({
   HIGHCHARTS_CORE_SCRIPTS: v.array(scriptsNames.core),
   HIGHCHARTS_MODULE_SCRIPTS: v.array(scriptsNames.modules),
   HIGHCHARTS_INDICATOR_SCRIPTS: v.array(scriptsNames.indicators),
+  HIGHCHARTS_CUSTOM_SCRIPTS: v.array(),
   HIGHCHARTS_FORCE_FETCH: v.boolean(),
   HIGHCHARTS_CACHE_PATH: v.string(),
   HIGHCHARTS_ADMIN_TOKEN: v.string(),
diff --git a/lib/schemas/config.js b/lib/schemas/config.js
index 50600df..ccb23d1 100644
--- a/lib/schemas/config.js
+++ b/lib/schemas/config.js
@@ -182,6 +182,7 @@ export const defaultConfig = {
     customScripts: {
       value: scriptsNames.custom,
       type: 'string[]',
+      envLink: 'HIGHCHARTS_CUSTOM_SCRIPTS',
       description: 'Additional custom scripts or dependencies to fetch.'
     },
     forceFetch: {
diff --git a/tests/unit/envs.test.js b/tests/unit/envs.test.js
index fe31e8b..d0363e7 100644
--- a/tests/unit/envs.test.js
+++ b/tests/unit/envs.test.js
@@ -42,7 +42,8 @@ describe('Environment variables should be correctly parsed', () => {
     const env = {
       HIGHCHARTS_CORE_SCRIPTS: 'core1, core2, highcharts',
       HIGHCHARTS_MODULE_SCRIPTS: 'module1, map, module2',
-      HIGHCHARTS_INDICATOR_SCRIPTS: 'indicators-all, indicator1, indicator2'
+      HIGHCHARTS_INDICATOR_SCRIPTS: 'indicators-all, indicator1, indicator2',
+      HIGHCHARTS_CUSTOM_SCRIPTS: 'custom1, custom2'
     };
 
     const parsed = Config.partial().parse(env);
@@ -50,6 +51,7 @@ describe('Environment variables should be correctly parsed', () => {
     expect(parsed.HIGHCHARTS_CORE_SCRIPTS).toEqual(['highcharts']);
     expect(parsed.HIGHCHARTS_MODULE_SCRIPTS).toEqual(['map']);
     expect(parsed.HIGHCHARTS_INDICATOR_SCRIPTS).toEqual(['indicators-all']);
+    expect(parsed.HIGHCHARTS_CUSTOM_SCRIPTS).toEqual(['custom1', 'custom2']);
   });
 
   test('HIGHCHARTS_FORCE_FETCH should be a boolean', () => {