diff --git a/app/src/pages/PiperackModule.tsx b/app/src/pages/PiperackModule.tsx
index 0e7d41a..d41161e 100644
--- a/app/src/pages/PiperackModule.tsx
+++ b/app/src/pages/PiperackModule.tsx
@@ -164,7 +164,7 @@ const PiperackModule: React.FC = () => {
                   </div>
                   <span className="text-sm text-muted-foreground">{phiStruct.toFixed(2)}</span>
                 </div>
-                <Slider value={[phiStruct]} min={0.1} max={0.6} step={0.05} onValueChange={v => setPhiStruct(v[0])} />
+                <Slider value={[phiStruct]} min={0.1} max={1.0} step={0.05} onValueChange={v => setPhiStruct(v[0])} />
               </div>
             </div>
           </div>