diff --git a/platform-darwin/Source/Mac/MPSiteModel.m b/platform-darwin/Source/Mac/MPSiteModel.m
index 01907209..79a4ce46 100644
--- a/platform-darwin/Source/Mac/MPSiteModel.m
+++ b/platform-darwin/Source/Mac/MPSiteModel.m
@@ -179,7 +179,8 @@
     if (algorithmVersion == self.algorithm.version)
         return;
     [self willChangeValueForKey:@"outdated"];
-    self.algorithm = MPAlgorithmForVersion( algorithmVersion )?: self.algorithm;
+    self.algorithm =
+            MPAlgorithmForVersion( MIN( MPAlgorithmVersionLast, MAX( MPAlgorithmVersionFirst, algorithmVersion ) ) )?: self.algorithm;
     [self didChangeValueForKey:@"outdated"];
 
     if (self.entityOID)
diff --git a/platform-darwin/Source/Mac/MPSitesWindowController.xib b/platform-darwin/Source/Mac/MPSitesWindowController.xib
index b263f365..a62de979 100644
--- a/platform-darwin/Source/Mac/MPSitesWindowController.xib
+++ b/platform-darwin/Source/Mac/MPSitesWindowController.xib
@@ -722,7 +722,7 @@ Use the arrows ⇅ to navigate the list or esc ⎋ to exit.</string>
                                                 <shadow key="shadow">
                                                     <color key="color" name="controlLightHighlightColor" catalog="System" colorSpace="catalog"/>
                                                 </shadow>
-                                                <stepperCell key="cell" continuous="YES" alignment="left" minValue="1" maxValue="1000" doubleValue="1" id="73y-03-zHt"/>
+                                                <stepperCell key="cell" continuous="YES" alignment="left" maxValue="4294967295" doubleValue="1" valueWraps="YES" id="73y-03-zHt"/>
                                                 <connections>
                                                     <binding destination="mcS-ik-b0n" name="value" keyPath="selection.algorithmVersion" id="GyA-hK-6cD"/>
                                                 </connections>
@@ -776,7 +776,7 @@ Use the arrows ⇅ to navigate the list or esc ⎋ to exit.</string>
                                                 <shadow key="shadow">
                                                     <color key="color" name="controlLightHighlightColor" catalog="System" colorSpace="catalog"/>
                                                 </shadow>
-                                                <stepperCell key="cell" continuous="YES" alignment="left" minValue="1" maxValue="1000" doubleValue="1" id="ikF-n4-xiI"/>
+                                                <stepperCell key="cell" continuous="YES" alignment="left" minValue="1" maxValue="4294967295" doubleValue="1" valueWraps="YES" id="ikF-n4-xiI"/>
                                                 <connections>
                                                     <binding destination="mcS-ik-b0n" name="value" keyPath="selection.counter" id="qmm-6z-boy"/>
                                                 </connections>