diff --git a/src/pages/Analytics.tsx b/src/pages/Analytics.tsx
index 0243f28..c38b0e8 100644
--- a/src/pages/Analytics.tsx
+++ b/src/pages/Analytics.tsx
@@ -113,17 +113,20 @@ const Analytics = () => {
                       currency: 'KRW',
                       notation: 'compact',
                       maximumFractionDigits: 1
-                    }).format(value)
+                    }).format(Number(value))
                   } 
                 />
                 <Tooltip 
-                  formatter={(value) => 
-                    new Intl.NumberFormat('ko-KR', {
-                      style: 'currency',
-                      currency: 'KRW',
-                      maximumFractionDigits: 0
-                    }).format(value)
-                  }
+                  formatter={(value) => {
+                    if (typeof value === 'number') {
+                      return new Intl.NumberFormat('ko-KR', {
+                        style: 'currency',
+                        currency: 'KRW',
+                        maximumFractionDigits: 0
+                      }).format(value);
+                    }
+                    return value;
+                  }}
                 />
                 <Legend />
                 <Bar