diff --git a/src/CliProgram/Validation/TCommandWithValidation.php b/src/CliProgram/Validation/TCommandWithValidation.php
index 07a8339..ba92d99 100644
--- a/src/CliProgram/Validation/TCommandWithValidation.php
+++ b/src/CliProgram/Validation/TCommandWithValidation.php
@@ -67,20 +67,30 @@ trait TCommandWithValidation {
             //region Get the argument value
             $argumentValue = $input->getArgument($argumentName);
             //endregion
-            //region Check the argument value is not Null
+            //region Check the argument value is not
             if ($argumentValue === null) {
                 // If the value is strictly Null (the default value), don't check it → skip
                 continue;
             }
             //endregion
 
-            //region Check the value is valid
-            if (!$argumentValidator->validate($argumentValue)) {
-                throw new InvalidValueException(sprintf('The "%s" argument has not a valid value', $argumentName));
+            //region Check the value is valid and replace it by the one extracted from the validator
+            if ($this->getDefinition()->getArgument($argumentName)->isArray() && is_array($argumentValue)) {
+                // This is an “array” argument → check and replace each value instead of the array itself
+                foreach ($argumentValue as &$argumentValueEntry) {
+                    if (!$argumentValidator->validate($argumentValueEntry)) {
+                        throw new InvalidValueException(sprintf('The "%s" argument has not a valid value', $argumentName));
+                    }
+                    $argumentValueEntry = $argumentValidator->getValue();
+                }
+                $input->setArgument($argumentName, $argumentValue);
+            }
+            else {
+                if (!$argumentValidator->validate($argumentValue)) {
+                    throw new InvalidValueException(sprintf('The "%s" argument has not a valid value', $argumentName));
+                }
+                $input->setArgument($argumentName, $argumentValidator->getValue());
             }
-            //endregion
-            //region Replace the value by the one extracted from the validator
-            $input->setArgument($argumentName, $argumentValidator->getValue());
             //endregion
         }
     }
@@ -111,13 +121,23 @@ trait TCommandWithValidation {
             }
             //endregion
 
-            //region Check the value is valid
-            if (!$optionValidator->validate($optionValue)) {
-                throw new InvalidValueException(sprintf('The "--%s" option has not a valid value', $optionName));
+            //region Check the value is valid and replace it by the one extracted from the validator
+            if ($this->getDefinition()->getOption($optionName)->isArray() && is_array($optionValue)) {
+                // This is an “array” argument → check and replace each value instead of the array itself
+                foreach ($optionValue as &$optionValueEntry) {
+                    if (!$optionValidator->validate($optionValueEntry)) {
+                        throw new InvalidValueException(sprintf('The "--%s" option has not a valid value', $optionName));
+                    }
+                    $optionValueEntry = $optionValidator->getValue();
+                }
+                $input->setArgument($optionName, $optionValue);
+            }
+            else {
+                if (!$optionValidator->validate($optionValue)) {
+                    throw new InvalidValueException(sprintf('The "--%s" option has not a valid value', $optionName));
+                }
+                $input->setOption($optionName, $optionValidator->getValue());
             }
-            //endregion
-            //region Replace the value by the one extracted from the validator
-            $input->setOption($optionName, $optionValidator->getValue());
             //endregion
         }
     }