diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 00000000..ad4054e5
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+10.14.1
\ No newline at end of file
diff --git a/src/__tests__/__snapshots__/gen-api-models.test.ts.snap b/src/__tests__/__snapshots__/gen-api-models.test.ts.snap
index 3fa0ca2f..24d5fb09 100644
--- a/src/__tests__/__snapshots__/gen-api-models.test.ts.snap
+++ b/src/__tests__/__snapshots__/gen-api-models.test.ts.snap
@@ -235,7 +235,7 @@ import { WithinRangeInteger } from \\"italia-ts-commons/lib/numbers\\";
 import * as t from \\"io-ts\\";
 
 export type WithinRangeIntegerTest = t.TypeOf<typeof WithinRangeIntegerTest>;
-export const WithinRangeIntegerTest = WithinRangeInteger(0, 10);
+export const WithinRangeIntegerTest = WithinRangeInteger(0, 11);
 "
 `;
 
diff --git a/templates/macros.njk b/templates/macros.njk
index 5b3ab43f..6b83b50f 100644
--- a/templates/macros.njk
+++ b/templates/macros.njk
@@ -87,7 +87,7 @@
 {% macro defineInteger(definitionName, definition, inline = false) -%}
   {% if definition.minimum != undefined and definition.maximum != undefined %}
     {{- 'import { WithinRangeInteger } from "italia-ts-commons/lib/numbers";' | addImport -}}
-    {% set typedef %}WithinRangeInteger({{ definition.minimum }}, {{ definition.maximum }}){% endset %}
+    {% set typedef %}WithinRangeInteger({{ definition.minimum }}, {{ definition.maximum + 1 }}){% endset %}
   {% elif definition.minimum == "0" %}
     {{- 'import { NonNegativeInteger } from "italia-ts-commons/lib/numbers";' | addImport -}}
     {% set typedef %}NonNegativeInteger{% endset %}