diff --git a/defs/ethereum/networks.json b/defs/ethereum/networks.json
index 2d7f69206..8241ef6d9 100644
--- a/defs/ethereum/networks.json
+++ b/defs/ethereum/networks.json
@@ -78,10 +78,18 @@
   },
   {
     "chain_id": 64,
+    "slip44": 163,
     "shortcut": "ELLA",
     "name": "Ellaism",
     "url": "https://ellaism.org"
   },
+  {
+    "chain_id": 820,
+    "slip44": 820,
+    "shortcut": "CLO",
+    "name": "Callisto",
+    "url": "https://callisto.network"
+  },
   {
     "chain_id": 1987,
     "slip44": 1987,