diff --git a/src/main/tjava/com/r35157/evelyn/emc/impl/ref/EvelynMissionControlImpl.tjava b/src/main/tjava/com/r35157/evelyn/emc/impl/ref/EvelynMissionControlImpl.tjava
index 4598f64..d9f6916 100644
--- a/src/main/tjava/com/r35157/evelyn/emc/impl/ref/EvelynMissionControlImpl.tjava
+++ b/src/main/tjava/com/r35157/evelyn/emc/impl/ref/EvelynMissionControlImpl.tjava
@@ -84,7 +84,7 @@ public final class EvelynMissionControlImpl implements
         return new StatusIndexChart(chart, xAxis, yAxis, priceIndexSeries);
     }
 
-    static double calculateYBound(List<EvelynStatusIndexPoint> history) {
+    private static double calculateYBound(List<EvelynStatusIndexPoint> history) {
         BigDecimal maxAbsoluteValue = BigDecimal.ZERO;
         for (EvelynStatusIndexPoint point : history) {
             maxAbsoluteValue = max(maxAbsoluteValue, point.evelynPriceIndex());
@@ -99,7 +99,7 @@ public final class EvelynMissionControlImpl implements
         return bound == 0.0 ? EMPTY_Y_BOUND : bound;
     }
 
-    static void refreshChart(
+    private static void refreshChart(
             StatusIndexChart statusIndexChart,
             List<EvelynStatusIndexPoint> history
     ) {
@@ -134,7 +134,7 @@ public final class EvelynMissionControlImpl implements
         updateAxisBounds(statusIndexChart, history);
     }
 
-    static BigDecimal max(BigDecimal currentMaximum, BigDecimal candidate) {
+    private static BigDecimal max(BigDecimal currentMaximum, BigDecimal candidate) {
         return currentMaximum.max(candidate.abs());
     }