diff --git a/coins.json b/coins.json
index 5bff7532a5..4d0d528c09 100644
--- a/coins.json
+++ b/coins.json
@@ -4,6 +4,7 @@
 	"address_type": 0,
 	"address_type_p2sh": 5,
 	"maxfee_kb": 500000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Bitcoin Signed Message:\n",
 	"hash_genesis_block": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
 	"xpub_magic": "0488b21e",
@@ -24,6 +25,7 @@
 	"address_type": 111,
 	"address_type_p2sh": 196,
 	"maxfee_kb": 10000000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Bitcoin Signed Message:\n",
 	"hash_genesis_block": "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
 	"xpub_magic": "043587cf",
@@ -41,6 +43,7 @@
 	"address_type": 52,
 	"address_type_p2sh": 5,
 	"maxfee_kb": 10000000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Namecoin Signed Message:\n",
 	"hash_genesis_block": "000000000062b72c5e2ceb45fbc8587e807c155b0da735e6483dfba2f0a9c770",
 	"xpub_magic": "019da462",
@@ -58,6 +61,7 @@
 	"address_type": 48,
 	"address_type_p2sh": 50,
 	"maxfee_kb": 40000000,
+	"minfee_kb": 100000,
 	"signed_message_header": "Litecoin Signed Message:\n",
 	"hash_genesis_block": "12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2",
 	"xpub_magic": "019da462",
@@ -75,6 +79,7 @@
 	"address_type": 30,
 	"address_type_p2sh": 22,
 	"maxfee_kb": 1000000000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Dogecoin Signed Message:\n",
 	"hash_genesis_block": "1a91e3dace36e2be3bf030a65679fe821aa1d6ef92e7c9902eb318182c355691",
 	"xpub_magic": "02facafd",
@@ -92,6 +97,7 @@
 	"address_type": 76,
 	"address_type_p2sh": 16,
 	"maxfee_kb": 100000,
+	"minfee_kb": 10000,
 	"signed_message_header": "DarkCoin Signed Message:\n",
 	"hash_genesis_block": "00000ffd590b1485b3caadc19b22e6379c733355108f107a430458cdf3407ab6",
 	"xpub_magic": "02fe52cc",
@@ -109,6 +115,7 @@
 	"address_type": 7352,
 	"address_type_p2sh": 7357,
 	"maxfee_kb": 1000000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Zcash Signed Message:\n",
 	"hash_genesis_block": "00040fe8ec8471911baa1db1266ea15dd06b4a8a5c453883c000b031973dce08",
 	"xpub_magic": "0488b21e",
@@ -126,6 +133,7 @@
 	"address_type": 7461,
 	"address_type_p2sh": 7354,
 	"maxfee_kb": 10000000,
+	"minfee_kb": 1000,
 	"signed_message_header": "Zcash Signed Message:\n",
 	"hash_genesis_block": "05a60a92d99d85997cce3b87616c089f6124d7342af37106edc76126334a2c38",
 	"xpub_magic": "043587cf",