diff --git a/lib/frenzy/update_feeds.ex b/lib/frenzy/update_feeds.ex
index 1adc8f0..bc3e612 100644
--- a/lib/frenzy/update_feeds.ex
+++ b/lib/frenzy/update_feeds.ex
@@ -83,7 +83,7 @@ defmodule Frenzy.UpdateFeeds do
 
         Logger.debug("Got 301 redirect from #{feed.feed_url} to #{new_url}, updating feed URL")
         changeset = Feed.changeset(feed, %{feed_url: new_url})
-        {:ok, feed} = Repo.insert(changeset)
+        {:ok, feed} = Repo.update(changeset)
         update_feed(feed)
 
       {:error, %HTTPoison.Error{reason: reason}} ->
@@ -129,7 +129,7 @@ defmodule Frenzy.UpdateFeeds do
           content
 
         {:err, reason} ->
-          Logger.warn("Unable to fetch article for #{url}: #{reason}")
+          Logger.warn("Unable to fetch article for #{url}: #{inspect(reason)}")
           entry.description
       end
 
@@ -200,7 +200,7 @@ defmodule Frenzy.UpdateFeeds do
     end
   end
 
-  defp get_article_content(url) do
+  defp get_article_content(url) when is_binary(url) and url != "" do
     Logger.debug("Getting article from #{url}")
 
     case HTTPoison.get(url) do
@@ -228,4 +228,6 @@ defmodule Frenzy.UpdateFeeds do
         {:err, reason}
     end
   end
+
+  defp get_article_content(_url), do: {:err, "URL must be a non-empty string"}
 end