diff --git a/API/Controllers/SeriesController.cs b/API/Controllers/SeriesController.cs
index 408ad9b86..f981f2dec 100644
--- a/API/Controllers/SeriesController.cs
+++ b/API/Controllers/SeriesController.cs
@@ -95,5 +95,31 @@ namespace API.Controllers
 
             return Ok();
         }
+
+        [HttpPost]
+        public async Task<ActionResult> UpdateSeries(UpdateSeriesDto updateSeries)
+        {
+            _logger.LogInformation("{UserName} is updating Series {SeriesName}", User.GetUsername(), updateSeries.Name);
+
+            var series = await _unitOfWork.SeriesRepository.GetSeriesByIdAsync(updateSeries.Id);
+
+            if (series == null) return BadRequest("Series does not exist");
+
+            // TODO: Support changing series properties once "locking" is implemented.
+            // series.Name = updateSeries.Name;
+            // series.OriginalName = updateSeries.OriginalName;
+            // series.SortName = updateSeries.SortName;
+            series.Summary = updateSeries.Summary;
+            //series.CoverImage = updateSeries.CoverImage;
+            
+            _unitOfWork.SeriesRepository.Update(series);
+
+            if (await _unitOfWork.Complete())
+            {
+                return Ok();
+            }
+            
+            return BadRequest("There was an error with updating the series");
+        }
     }
 }
\ No newline at end of file
diff --git a/API/DTOs/UpdateSeriesDto.cs b/API/DTOs/UpdateSeriesDto.cs
new file mode 100644
index 000000000..c25e99764
--- /dev/null
+++ b/API/DTOs/UpdateSeriesDto.cs
@@ -0,0 +1,14 @@
+namespace API.DTOs
+{
+    public class UpdateSeriesDto
+    {
+        public int Id { get; init; }
+        public string Name { get; init; }
+        public string OriginalName { get; init; }
+        public string SortName { get; init; }
+        public string Summary { get; init; }
+        public byte[] CoverImage { get; init; }
+        public int UserRating { get; set; }
+        public string UserReview { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/API/Services/ArchiveService.cs b/API/Services/ArchiveService.cs
index e7fd988b8..f1c52a0d0 100644
--- a/API/Services/ArchiveService.cs
+++ b/API/Services/ArchiveService.cs
@@ -80,7 +80,7 @@ namespace API.Services
             {
                 using var stream = entry.Open();
                 using var thumbnail = Image.ThumbnailStream(stream, ThumbnailWidth);
-                return thumbnail.WriteToBuffer(".jpg");
+                return thumbnail.WriteToBuffer(".jpg"); // TODO: Validate this code works with .png files
             }
             catch (Exception ex)
             {