diff --git a/.github/CHECKPOINT_ISSUE_TEMPLATE.md b/.github/CHECKPOINT_ISSUE_TEMPLATE.md
index d322cd9565d5..d1e6732c7973 100644
--- a/.github/CHECKPOINT_ISSUE_TEMPLATE.md
+++ b/.github/CHECKPOINT_ISSUE_TEMPLATE.md
@@ -19,8 +19,8 @@ for chain in "${chains[@]}"
 do
     # download the latest snapshot.
     # =============================
-    # - calibnet ~3G, ~1min on a droplet
-    # - mainnet ~60G, ~15mins on a droplet
+    # - calibnet ~6G, ~5min on a droplet
+    # - mainnet ~74G, ~60mins on a droplet
     aria2c -x5 https://forest-archive.chainsafe.dev/latest/"$chain"/ -o "$chain"
 
     # print out the checkpoints.
diff --git a/build/known_blocks.yaml b/build/known_blocks.yaml
index 2d993d1fbac3..91bf4befa041 100644
--- a/build/known_blocks.yaml
+++ b/build/known_blocks.yaml
@@ -1,12 +1,13 @@
 # This file maps epochs to block headers for calibnet and mainnet. Forest use
 # this mapping to quickly identify the origin network of a tipset.
 #
-# Block headers can be inspected on filfox:
-# - https://filfox.info/en/block/bafy2bzacebnfm6dvxo7sm5thcxnv3kttoamb53uxycnvtdxgk5mh7d73qlly2
-# - https://calibration.filfox.info/en/block/bafy2bzacedhkkz76zdekpexha55b42eop42e24ajmajm26wws4nbvtq7louvu
+# Block headers can be inspected on beryx:
+# - https://beryx.io/fil/mainnet/block-cid/bafy2bzacedisdelql35luibjoxk5jyw7iai5if4eezrjslwhtuqmcczdjahb2
+# - https://beryx.io/fil/calibration/block-cid/bafy2bzaceb7fz2umktqqckzbygfhcun4avpd6g5pgrmhg4w4rvsuywbbptm6e
 #
 # This file is maintained monthly - see `CHECKPOINT_ISSUE_TEMPLATE.md`
 calibnet:
+  3110397: bafy2bzaceb7fz2umktqqckzbygfhcun4avpd6g5pgrmhg4w4rvsuywbbptm6e
   3024000: bafy2bzacebc3obhbqtb5375alsxaqyypjsh4ho3fqq5baspzblw7tewryfqb6
   2937600: bafy2bzacebovgwd2risqmifcu2ry7f7ktppfuwfjjty56z7jraxvowjlh2ghq
   2851200: bafy2bzacebbsz6n3tzo6mpcqqa3ryobcwvaq54aid2ysi6okaoenukz3c4c6c
@@ -43,6 +44,7 @@ calibnet:
   172800: bafy2bzacebluce5la2lbyjlgmup6mx4xytnnilsf4oy6v4omon2ivyduqwlsq
   86400: bafy2bzaceatx7tlwdhez6vyias5qlhaxa54vjftigbuqzfsmdqduc6jdiclzc
 mainnet:
+  5443200: bafy2bzacedisdelql35luibjoxk5jyw7iai5if4eezrjslwhtuqmcczdjahb2
   5356800: bafy2bzacecjskrcifcteuotqxwq5u5e7ol6z4zejqafn2ycco4abttt3vqmgy
   5270400: bafy2bzacecnpu6buis3xsy37cq3bvmd63nr4wuvhti46k3emeddzal5iw3gn2
   5184000: bafy2bzaceafxgm3pg5j5sqrf2mvpz4bpr2go4fdbagxuu5kjcr5iknpw7rkau