diff --git a/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/AddIntervalRole.java b/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/AddIntervalRole.java
index 76215cd55..3b693123c 100644
--- a/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/AddIntervalRole.java
+++ b/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/AddIntervalRole.java
@@ -23,6 +23,9 @@
 import dev.ikm.tinkar.coordinate.view.calculator.ViewCalculator;
 import dev.ikm.tinkar.terms.TinkarTerm;
 import javafx.event.ActionEvent;
+
+import java.math.BigDecimal;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -39,8 +42,8 @@ public AddIntervalRole(String text, AxiomSubjectRecord axiomSubjectRecord, ViewC
 	@Override
 	public void doAction(ActionEvent t, AxiomSubjectRecord axiomSubjectRecord, EditCoordinateRecord editCoordinate) {
 		LogicalExpressionBuilder leb = new LogicalExpressionBuilder(axiomSubjectRecord.axiomTree());
-		LogicalAxiom.Atom.TypedAtom.IntervalRole role = leb.IntervalRole(TinkarTerm.UNMODELED_ROLE_CONCEPT, 0, true, 10,
-				true, TinkarTerm.UNMODELED_ROLE_CONCEPT);
+		LogicalAxiom.Atom.TypedAtom.IntervalRole role = leb.IntervalRole(TinkarTerm.UNMODELED_ROLE_CONCEPT,
+				new BigDecimal(0), true, new BigDecimal(10), true, TinkarTerm.UNMODELED_ROLE_CONCEPT);
 		leb.addToFirstAnd(axiomSubjectRecord.axiomIndex(), role);
 		putUpdatedLogicalExpression(editCoordinate, leb.build());
 	}
diff --git a/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/ChangeIntervalBound.java b/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/ChangeIntervalBound.java
index 83843271a..d77e82211 100644
--- a/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/ChangeIntervalBound.java
+++ b/rules/src/main/java/dev/ikm/komet/rules/actions/axiom/ChangeIntervalBound.java
@@ -15,6 +15,7 @@
  */
 package dev.ikm.komet.rules.actions.axiom;
 
+import java.math.BigDecimal;
 import java.util.Optional;
 
 import dev.ikm.elk.snomed.interval.Interval;
@@ -56,14 +57,14 @@ public void doAction(ActionEvent t, AxiomSubjectRecord axiomSubjectRecord, EditC
 		if (!result.isPresent())
 			return;
 		try {
-			int value = Integer.parseInt(result.get());
+			BigDecimal value = new BigDecimal(result.get());
 			if (lower) {
 				interval.setLowerBound(value);
 			} else {
 				interval.setUpperBound(value);
 			}
 		} catch (NumberFormatException ex) {
-			new Alert(AlertType.ERROR, "Enter an integer").showAndWait();
+			new Alert(AlertType.ERROR, "Enter an integer or decimal ").showAndWait();
 			return;
 		}
 		LogicalExpressionBuilder leb = new LogicalExpressionBuilder(axiomSubjectRecord.axiomTree());