diff --git a/src/components/olmap/FlushingAnalysis/AnalysisParameters.tsx b/src/components/olmap/FlushingAnalysis/AnalysisParameters.tsx
index b9e07e8..9dbeb1b 100644
--- a/src/components/olmap/FlushingAnalysis/AnalysisParameters.tsx
+++ b/src/components/olmap/FlushingAnalysis/AnalysisParameters.tsx
@@ -225,7 +225,7 @@ const AnalysisParameters: React.FC = () => {
     setAnalyzing(true);
 
     try {
-      const formattedTime = startTime.format("YYYY-MM-DDTHH:mm:00");
+      const formattedTime = startTime.format("YYYY-MM-DDTHH:mm:00Z"); // ISO format with seconds set to 00
 
       const params = {
         scheme_name: schemeName,
@@ -242,7 +242,7 @@ const AnalysisParameters: React.FC = () => {
       // but axios usually handles array as valves[]=1&valves[]=2
       // FastAPI default expects repeated query params.
 
-      const response = await api.get(`${config.BACKEND_URL}/flushing_analysis/`, {
+      const response = await api.get(`${config.BACKEND_URL}/api/v1/flushing_analysis/`, {
         params,
         // Ensure arrays are sent as repeated keys: valves=1&valves=2
         paramsSerializer: {