diff --git a/go/internal/domain/fees/fees.go b/go/internal/domain/fees/fees.go
index 2ebee80..1158ee4 100644
--- a/go/internal/domain/fees/fees.go
+++ b/go/internal/domain/fees/fees.go
@@ -11,7 +11,7 @@ const (
 var AdultFeeMonthlyRate = map[string]int{
 	"2025-09": 750, "2025-10": 750, "2025-11": 750, "2025-12": 750,
 	"2026-01": 750, "2026-02": 750, "2026-03": 350,
-	"2026-04": 700, "2026-05": 700,
+	"2026-04": 700, "2026-05": 450, "2026-06": 600, "2026-07": 600, "2026-08": 600,
 }
 
 // CalculateFee returns the adult fee in CZK for attendanceCount practices in
diff --git a/scripts/attendance.py b/scripts/attendance.py
index adda417..c858b2d 100644
--- a/scripts/attendance.py
+++ b/scripts/attendance.py
@@ -21,7 +21,10 @@ ADULT_FEE_MONTHLY_RATE = {
     "2026-02": 750,
     "2026-03": 350,
     "2026-04": 700,
-    "2026-05": 700,
+    "2026-05": 450,
+    "2026-06": 600,
+    "2026-07": 600,
+    "2026-08": 600,
 }
 
 JUNIOR_FEE_DEFAULT = 500  # CZK for 2+ practices