diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc3adecc..c657cf6b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Releases now retain executable permissions on Linux and macOS.
+- Sonarr: Do not modify or delete release profiles when using `--preview`
 
 ## [4.0.1] - 2022-12-21
 
diff --git a/src/Recyclarr.TrashLib/Services/CustomFormat/CustomFormatUpdater.cs b/src/Recyclarr.TrashLib/Services/CustomFormat/CustomFormatUpdater.cs
index b1636e04..10893ec5 100644
--- a/src/Recyclarr.TrashLib/Services/CustomFormat/CustomFormatUpdater.cs
+++ b/src/Recyclarr.TrashLib/Services/CustomFormat/CustomFormatUpdater.cs
@@ -47,19 +47,18 @@ internal class CustomFormatUpdater : ICustomFormatUpdater
         if (isPreview)
         {
             PreviewCustomFormats();
+            return;
         }
-        else
-        {
-            await _persistenceProcessor.PersistCustomFormats(_guideProcessor.ProcessedCustomFormats,
-                _guideProcessor.DeletedCustomFormatsInCache, _guideProcessor.ProfileScores);
 
-            PrintApiStatistics(_persistenceProcessor.Transactions);
-            PrintQualityProfileUpdates();
+        await _persistenceProcessor.PersistCustomFormats(_guideProcessor.ProcessedCustomFormats,
+            _guideProcessor.DeletedCustomFormatsInCache, _guideProcessor.ProfileScores);
 
-            // Cache all the custom formats (using ID from API response).
-            _cache.Update(_guideProcessor.ProcessedCustomFormats);
-            _cache.Save();
-        }
+        PrintApiStatistics(_persistenceProcessor.Transactions);
+        PrintQualityProfileUpdates();
+
+        // Cache all the custom formats (using ID from API response).
+        _cache.Update(_guideProcessor.ProcessedCustomFormats);
+        _cache.Save();
     }
 
     private void PrintQualityProfileUpdates()
diff --git a/src/Recyclarr.TrashLib/Services/Sonarr/ReleaseProfile/ReleaseProfileUpdater.cs b/src/Recyclarr.TrashLib/Services/Sonarr/ReleaseProfile/ReleaseProfileUpdater.cs
index 22695bae..c31aa1cf 100644
--- a/src/Recyclarr.TrashLib/Services/Sonarr/ReleaseProfile/ReleaseProfileUpdater.cs
+++ b/src/Recyclarr.TrashLib/Services/Sonarr/ReleaseProfile/ReleaseProfileUpdater.cs
@@ -55,14 +55,17 @@ public class ReleaseProfileUpdater : IReleaseProfileUpdater
                 selectedProfile.TrashId);
 
             selectedProfile = _pipeline.Process(selectedProfile, configProfile);
+            filteredProfiles.Add((selectedProfile, configProfile.Tags));
+        }
 
-            if (isPreview)
+        if (isPreview)
+        {
+            foreach (var profile in filteredProfiles.Select(x => x.Profile))
             {
-                PrintTermsAndScores(selectedProfile);
-                continue;
+                PrintTermsAndScores(profile);
             }
 
-            filteredProfiles.Add((selectedProfile, configProfile.Tags));
+            return;
         }
 
         await ProcessReleaseProfiles(filteredProfiles);
@@ -111,7 +114,7 @@ public class ReleaseProfileUpdater : IReleaseProfileUpdater
 
         _console.Output.WriteLine("  Include Preferred when Renaming?");
         _console.Output.WriteLine("    " +
-                                  (profile.IncludePreferredWhenRenaming ? "YES" : "NO"));
+            (profile.IncludePreferredWhenRenaming ? "YES" : "NO"));
         _console.Output.WriteLine("");
 
         PrintTerms("Must Contain", profile.Required);
@@ -164,7 +167,7 @@ public class ReleaseProfileUpdater : IReleaseProfileUpdater
             .Where(sonarrProfile =>
             {
                 return sonarrProfile.Name.StartsWithIgnoreCase("[Trash]") &&
-                       !profiles.Any(profile => sonarrProfile.Name.EndsWithIgnoreCase(profile.Name));
+                    !profiles.Any(profile => sonarrProfile.Name.EndsWithIgnoreCase(profile.Name));
             });
 
         foreach (var profile in sonarrProfilesToDelete)