diff --git a/src/CqlBuilderPanel/functionsSection/argumentSection/ArgumentSection.tsx b/src/CqlBuilderPanel/functionsSection/argumentSection/ArgumentSection.tsx
index f084adf..7bffe06 100644
--- a/src/CqlBuilderPanel/functionsSection/argumentSection/ArgumentSection.tsx
+++ b/src/CqlBuilderPanel/functionsSection/argumentSection/ArgumentSection.tsx
@@ -137,6 +137,7 @@ export default function ArgumentSection(props: ArgumentsProps) {
               inputProps={{
                 "data-testid": "other-type-input",
               }}
+              // required
               {...formik.getFieldProps("other")}
               error={Boolean(formik.errors.other)}
               helperText={formik.errors.other}
diff --git a/src/CqlBuilderPanel/functionsSection/functionBuilder/FunctionBuilder.tsx b/src/CqlBuilderPanel/functionsSection/functionBuilder/FunctionBuilder.tsx
index b8c5c2e..12873a0 100644
--- a/src/CqlBuilderPanel/functionsSection/functionBuilder/FunctionBuilder.tsx
+++ b/src/CqlBuilderPanel/functionsSection/functionBuilder/FunctionBuilder.tsx
@@ -135,6 +135,9 @@ export default function FunctionBuilder({
                 if (e.target.value && !expressionEditorOpen) {
                   setExpressionEditorOpen(true);
                 }
+                if (e.target.value && !argumentsEditorOpen) {
+                  setArgumentsEditorOpen(true);
+                }
               }}
             />
           </div>
diff --git a/src/validations/FunctionArgumentSchemaValidator.ts b/src/validations/FunctionArgumentSchemaValidator.ts
index 61c68f1..48c0373 100644
--- a/src/validations/FunctionArgumentSchemaValidator.ts
+++ b/src/validations/FunctionArgumentSchemaValidator.ts
@@ -6,5 +6,10 @@ export const FunctionArgumentSchemaValidator = Yup.object().shape({
     "No spaces or special characters besides underscore are allowed"
   ),
   dataType: Yup.string(),
-  other: Yup.string(),
+  other: Yup.string().when("dataType", {
+    is: (value: any) => value === "Other",
+    then: (schema) =>
+      schema.required("This field is required when dataType is 'Other'."),
+    otherwise: (schema) => schema,
+  }),
 });