diff --git a/ui/frontend/src/lib/active-view/designer-ship-class.svelte b/ui/frontend/src/lib/active-view/designer-ship-class.svelte
index 7bb39cb..87787c7 100644
--- a/ui/frontend/src/lib/active-view/designer-ship-class.svelte
+++ b/ui/frontend/src/lib/active-view/designer-ship-class.svelte
@@ -250,6 +250,7 @@ the value fields so the diff in Phase 18 stays minimal.
 					bind:this={nameInputEl}
 					bind:value={name}
 					data-testid="designer-ship-class-input-name"
+					maxlength="30"
 					aria-invalid={validation.ok ? "false" : "true"}
 				/>
 			</label>