diff --git a/pipeline.py b/pipeline.py
index 750dde6..4243a1d 100644
--- a/pipeline.py
+++ b/pipeline.py
@@ -60,7 +60,7 @@ if not WGET_AT:
 #
 # Update this each time you make a non-cosmetic change.
 # It will be added to the WARC files and reported to the tracker.
-VERSION = '20210306.01'
+VERSION = '20210312.01'
 TRACKER_ID = 'reddit'
 TRACKER_HOST = 'legacy-api.arpa.li'
 MULTI_ITEM_SIZE = 20
diff --git a/reddit.lua b/reddit.lua
index e7ed9b3..35a98e2 100644
--- a/reddit.lua
+++ b/reddit.lua
@@ -312,6 +312,9 @@ wget.callbacks.get_urls = function(file, url, is_css, iri)
       and not string.match(url, "%.mpd")
     ) then
     html = read_file(file)
+    if string.match(url, "^https?://www%.reddit%.com/[^/]+/[^/]+/comments/[0-9a-z]+/[^/]+/[0-9a-z]*/?$") then
+      check(url .. "?utm_source=reddit&utm_medium=web2x&context=3")
+    end
     if string.match(url, "^https?://old%.reddit%.com/api/morechildren$") then
       html = string.gsub(html, '\\"', '"')
     elseif string.match(url, "^https?://old%.reddit%.com/r/[^/]+/comments/")