diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a304caf..b43328f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Print more useful diagnostics when there's a connectivity problem to a service (e.g. incorrect
   `base_url`).
+- Regression that prevented basic validation of `base_url` & `api_key`.
 
 ## [6.0.2] - 2023-10-20
 
diff --git a/src/Recyclarr.Common/FluentValidation/IRuntimeValidationService.cs b/src/Recyclarr.Common/FluentValidation/IRuntimeValidationService.cs
index 90a9a18a..478d8596 100644
--- a/src/Recyclarr.Common/FluentValidation/IRuntimeValidationService.cs
+++ b/src/Recyclarr.Common/FluentValidation/IRuntimeValidationService.cs
@@ -4,5 +4,5 @@ namespace Recyclarr.Common.FluentValidation;
 
 public interface IRuntimeValidationService
 {
-    ValidationResult Validate(object instance, params string[] ruleSets);
+    ValidationResult Validate(object instance, params string[] additionalRuleSets);
 }
diff --git a/src/Recyclarr.Common/FluentValidation/RuntimeValidationService.cs b/src/Recyclarr.Common/FluentValidation/RuntimeValidationService.cs
index 7c48c78a..5f2cf2e0 100644
--- a/src/Recyclarr.Common/FluentValidation/RuntimeValidationService.cs
+++ b/src/Recyclarr.Common/FluentValidation/RuntimeValidationService.cs
@@ -22,17 +22,15 @@ public class RuntimeValidationService : IRuntimeValidationService
             .ToDictionary(x => x.Item2!.GetGenericArguments()[0], x => x.Item1);
     }
 
-    public ValidationResult Validate(object instance, params string[] ruleSets)
+    public ValidationResult Validate(object instance, params string[] additionalRuleSets)
     {
         if (!_validators.TryGetValue(instance.GetType(), out var validator))
         {
             throw new ValidationException($"No validator is available for type: {instance.GetType().FullName}");
         }
 
-        IValidatorSelector validatorSelector = ruleSets.Length != 0
-            ? new RulesetValidatorSelector(ruleSets)
-            : new DefaultValidatorSelector();
-
+        var validatorSelector =
+            new RulesetValidatorSelector([RulesetValidatorSelector.DefaultRuleSetName, ..additionalRuleSets]);
         return validator.Validate(new ValidationContext<object>(instance, new PropertyChain(), validatorSelector));
     }
 }
diff --git a/src/Recyclarr.Config/Parsing/ConfigurationLoader.cs b/src/Recyclarr.Config/Parsing/ConfigurationLoader.cs
index 7f3358fb..bcbb6d5a 100644
--- a/src/Recyclarr.Config/Parsing/ConfigurationLoader.cs
+++ b/src/Recyclarr.Config/Parsing/ConfigurationLoader.cs
@@ -45,7 +45,7 @@ public class ConfigurationLoader(
             log.Warning("Configuration is empty");
         }
 
-        if (!validator.Validate(config))
+        if (!validator.Validate(config, YamlValidatorRuleSets.RootConfig))
         {
             return Array.Empty<IServiceConfiguration>();
         }