diff --git a/source/Server/Configuration/DatabaseInitializer.cs b/source/Server/Configuration/DatabaseInitializer.cs
index 1f70041..7187306 100644
--- a/source/Server/Configuration/DatabaseInitializer.cs
+++ b/source/Server/Configuration/DatabaseInitializer.cs
@@ -8,14 +8,14 @@ namespace Octopus.Server.Extensibility.Authentication.Guest.Configuration
 {
     class DatabaseInitializer : ExecuteWhenDatabaseInitializes
     {
-        readonly ILog log;
+        readonly ISystemLog log;
         readonly IWritableKeyValueStore settings;
         readonly IConfigurationStore configurationStore;
         readonly IGuestUserStateChecker guestUserStateChecker;
 
         private bool cleanupRequired = false;
 
-        public DatabaseInitializer(ILog log, IWritableKeyValueStore settings, IConfigurationStore configurationStore, IGuestUserStateChecker guestUserStateChecker)
+        public DatabaseInitializer(ISystemLog log, IWritableKeyValueStore settings, IConfigurationStore configurationStore, IGuestUserStateChecker guestUserStateChecker)
         {
             this.log = log;
             this.settings = settings;
diff --git a/source/Server/Configuration/GuestConfigureCommands.cs b/source/Server/Configuration/GuestConfigureCommands.cs
index 82524f1..592ce15 100644
--- a/source/Server/Configuration/GuestConfigureCommands.cs
+++ b/source/Server/Configuration/GuestConfigureCommands.cs
@@ -7,11 +7,11 @@ namespace Octopus.Server.Extensibility.Authentication.Guest.Configuration
 {
     class GuestConfigureCommands : IContributeToConfigureCommand
     {
-        readonly ILog log;
+        readonly ISystemLog log;
         readonly Lazy<IGuestConfigurationStore> configurationStore;
 
         public GuestConfigureCommands(
-            ILog log,
+            ISystemLog log,
             Lazy<IGuestConfigurationStore> configurationStore)
         {
             this.log = log;
@@ -25,7 +25,7 @@ public IEnumerable<ConfigureCommandOption> GetOptions()
                 var isEnabled = bool.Parse(v);
                 configurationStore.Value.SetIsEnabled(isEnabled);
                 log.Info($"Guest login enabled: {isEnabled}");
-            }); 
+            });
         }
     }
 }
\ No newline at end of file
diff --git a/source/Server/GuestAuth/GuestCredentialValidator.cs b/source/Server/GuestAuth/GuestCredentialValidator.cs
index 545ed5c..da73aac 100644
--- a/source/Server/GuestAuth/GuestCredentialValidator.cs
+++ b/source/Server/GuestAuth/GuestCredentialValidator.cs
@@ -10,12 +10,12 @@ namespace Octopus.Server.Extensibility.Authentication.Guest.GuestAuth
 {
     class GuestCredentialValidator : IGuestCredentialValidator
     {
-        readonly ILog log;
+        readonly ISystemLog log;
         readonly IUserStore userStore;
         readonly IGuestConfigurationStore configurationStore;
 
         public GuestCredentialValidator(
-            ILog log,
+            ISystemLog log,
             IUserStore userStore,
             IGuestConfigurationStore configurationStore)
         {
diff --git a/source/Server/GuestAuth/GuestUserStateChecker.cs b/source/Server/GuestAuth/GuestUserStateChecker.cs
index c3f85c8..0ee253f 100644
--- a/source/Server/GuestAuth/GuestUserStateChecker.cs
+++ b/source/Server/GuestAuth/GuestUserStateChecker.cs
@@ -10,10 +10,10 @@ namespace Octopus.Server.Extensibility.Authentication.Guest.GuestAuth
 {
     class GuestUserStateChecker : IGuestUserStateChecker
     {
-        readonly ILog log;
+        readonly ISystemLog log;
         readonly IUpdateableUserStore userStore;
 
-        public GuestUserStateChecker(ILog log, IUpdateableUserStore userStore)
+        public GuestUserStateChecker(ISystemLog log, IUpdateableUserStore userStore)
         {
             this.log = log;
             this.userStore = userStore;
diff --git a/source/Server/Server.csproj b/source/Server/Server.csproj
index f611fdd..509a1ba 100644
--- a/source/Server/Server.csproj
+++ b/source/Server/Server.csproj
@@ -15,8 +15,8 @@
 
   <ItemGroup>
     <PackageReference Include="Octopus.Configuration" Version="3.0.0" />
-    <PackageReference Include="Octopus.Diagnostics" Version="1.3.5" />
-    <PackageReference Include="Octopus.Server.Extensibility" Version="10.0.4" />
+    <PackageReference Include="Octopus.Diagnostics" Version="2.1.0" />
+    <PackageReference Include="Octopus.Server.Extensibility" Version="13.0.0" />
     <PackageReference Include="Octopus.Server.Extensibility.Authentication" Version="10.0.1" />
   </ItemGroup>