diff --git a/libs/remix-ui/run-tab/src/lib/components/contractGUI.tsx b/libs/remix-ui/run-tab/src/lib/components/contractGUI.tsx
index ecba6ec713..e2b2063743 100644
--- a/libs/remix-ui/run-tab/src/lib/components/contractGUI.tsx
+++ b/libs/remix-ui/run-tab/src/lib/components/contractGUI.tsx
@@ -373,7 +373,7 @@ export function ContractGUI(props: ContractGUIProps) {
                 <button
                   type="button"
                   data-id={buttonOptions.dataId}
-                  className={`udapp_instanceButton btn ${buttonOptions.classList}`}
+                  className={`udapp_instanceButton btn ${buttonOptions.classList} text-center d-flex justify-content-center align-items-center`}
                   disabled={props.disabled || (props.inputs !== '' && basicInput === '')}
                 >
                   {buttonOptions.content}