diff --git a/defs/coins/zcash.json b/defs/coins/zcash.json
index 336c110c40..c5704e730c 100644
--- a/defs/coins/zcash.json
+++ b/defs/coins/zcash.json
@@ -23,7 +23,7 @@
   "decred": false,
   "fork_id": null,
   "force_bip143": false,
-  "version_group_id": null,
+  "version_group_id": 63210096,
   "default_fee_b": {
     "Normal": 10
   },
diff --git a/defs/coins/zcash_testnet.json b/defs/coins/zcash_testnet.json
index 8a0ff71887..5160b0b47c 100644
--- a/defs/coins/zcash_testnet.json
+++ b/defs/coins/zcash_testnet.json
@@ -32,6 +32,8 @@
   "address_prefix": "zcash:",
   "min_address_length": 35,
   "max_address_length": 95,
-  "bitcore": [],
+  "bitcore": [
+    "https://explorer.testnet.z.cash"
+  ],
   "blockbook": []
 }