diff --git a/GroundStation.cs b/GroundStation.cs
index 1f2fbe7..b6e8a38 100644
--- a/GroundStation.cs
+++ b/GroundStation.cs
@@ -317,18 +317,26 @@ public Priority PushoverDefaultFailurePriority {
         public int PushoverEmergRetryInterval {
             get => Properties.Settings.Default.PushoverEmergRetryInterval;
             set {
-                Properties.Settings.Default.PushoverEmergRetryInterval = value;
-                CoreUtil.SaveSettings(Properties.Settings.Default);
-                RaisePropertyChanged();
+                if (value >= 30 && value <= 86400) {
+                    Properties.Settings.Default.PushoverEmergRetryInterval = value;
+                    CoreUtil.SaveSettings(Properties.Settings.Default);
+                    RaisePropertyChanged();
+                } else {
+                    RaisePropertyChanged();
+                }
             }
         }
 
         public int PushoverEmergExpireAfter {
             get => Properties.Settings.Default.PushoverEmergExpireAfter;
             set {
-                Properties.Settings.Default.PushoverEmergExpireAfter = value;
-                CoreUtil.SaveSettings(Properties.Settings.Default);
-                RaisePropertyChanged();
+                if (value >= 30 && value <= 86400) {
+                    Properties.Settings.Default.PushoverEmergExpireAfter = value;
+                    CoreUtil.SaveSettings(Properties.Settings.Default);
+                    RaisePropertyChanged();
+                } else {
+                    RaisePropertyChanged();
+                }
             }
         }
 
diff --git a/Options.xaml b/Options.xaml
index 8ecfc6d..4f2ee90 100644
--- a/Options.xaml
+++ b/Options.xaml
@@ -136,7 +136,7 @@
                             HorizontalAlignment="Right"
                             VerticalAlignment="Center">
                             <TextBlock.Text>Emergency retry interval</TextBlock.Text>
-                            <TextBlock.ToolTip>The interval in which a message with an Emergency prioity will alert in the Pushover client until it is acknowledged</TextBlock.ToolTip>
+                            <TextBlock.ToolTip>The interval in which a message with an Emergency prioity will alert in the Pushover client until it is acknowledged. Minimum = 30 seconds. Maximum = 86400 seconds (24 hours)</TextBlock.ToolTip>
                         </TextBlock>
                         <ninactrl:UnitTextBox
                             Width="75"
@@ -147,7 +147,11 @@
                             <TextBox.Text>
                                 <Binding Mode="TwoWay" Path="PushoverEmergRetryInterval">
                                     <Binding.ValidationRules>
-                                        <rules:GreaterThanZeroRule />
+                                        <rules:IntRangeRuleWithDefault>
+                                            <rules:IntRangeRuleWithDefault.ValidRange>
+                                                <rules:IntRangeChecker Minimum="30" Maximum="86400" />
+                                            </rules:IntRangeRuleWithDefault.ValidRange>
+                                        </rules:IntRangeRuleWithDefault>
                                     </Binding.ValidationRules>
                                 </Binding>
                             </TextBox.Text>
@@ -160,7 +164,7 @@
                             HorizontalAlignment="Right"
                             VerticalAlignment="Center">
                             <TextBlock.Text>Emergency retry limit</TextBlock.Text>
-                            <TextBlock.ToolTip>The time limit for which Emergency priority messages will alert for after being received</TextBlock.ToolTip>
+                            <TextBlock.ToolTip>The time limit for which Emergency priority messages will alert for after being received. Minimum = 30 seconds. Maximum = 86400 seconds (24 hours)</TextBlock.ToolTip>
                         </TextBlock>
                         <ninactrl:UnitTextBox
                             Width="75"
@@ -171,7 +175,11 @@
                             <TextBox.Text>
                                 <Binding Mode="TwoWay" Path="PushoverEmergExpireAfter">
                                     <Binding.ValidationRules>
-                                        <rules:GreaterThanZeroRule />
+                                        <rules:IntRangeRuleWithDefault>
+                                            <rules:IntRangeRuleWithDefault.ValidRange>
+                                                <rules:IntRangeChecker Minimum="30" Maximum="86400" />
+                                            </rules:IntRangeRuleWithDefault.ValidRange>
+                                        </rules:IntRangeRuleWithDefault>
                                     </Binding.ValidationRules>
                                 </Binding>
                             </TextBox.Text>