diff --git a/src/LocalTimezone.cs b/src/LocalTimezone.cs
index deb7ac5..a7756c7 100644
--- a/src/LocalTimezone.cs
+++ b/src/LocalTimezone.cs
@@ -513,7 +513,7 @@ public static GroupedTimezones[] GetTimezonesGroupedByOffset(bool onlyMappedTime
                             : timezone.DefaultIanaId).Replace("_", " "),
                         Timezone = timezone
                     })
-                    .DistinctBy(timezone => timezone.Timezone.DefaultIanaId)
+                    .DistinctBy(timezone => timezone.Timezone.DefaultIanaId, StringComparer.Ordinal)
                     .ToArray();
 
                 var ianaIds = timezones
diff --git a/src/R8.TzDateTime.csproj b/src/R8.TzDateTime.csproj
index 1399db8..0343a7f 100644
--- a/src/R8.TzDateTime.csproj
+++ b/src/R8.TzDateTime.csproj
@@ -65,7 +65,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Meziantou.Analyzer" Version="3.0.123">
+        <PackageReference Include="Meziantou.Analyzer" Version="3.0.139">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>