diff --git a/defs/bitcoin/groestlcoin.json b/defs/bitcoin/groestlcoin.json
index 8c8e9abe36..459e1d79c7 100644
--- a/defs/bitcoin/groestlcoin.json
+++ b/defs/bitcoin/groestlcoin.json
@@ -33,8 +33,11 @@
   "min_address_length": 27,
   "max_address_length": 34,
   "bitcore": [
-    "https://groestlsight.groestlcoin.org"
+    "https://groestlsight.groestlcoin.org",
+    "https://grsblocks.com/"
+  ],
+  "blockbook": [
+    "https://blockbook.groestlcoin.org"
   ],
-  "blockbook": [],
   "cooldown": 100
 }
diff --git a/defs/bitcoin/groestlcoin_testnet.json b/defs/bitcoin/groestlcoin_testnet.json
index 42b031199e..daf8fcb456 100644
--- a/defs/bitcoin/groestlcoin_testnet.json
+++ b/defs/bitcoin/groestlcoin_testnet.json
@@ -35,6 +35,8 @@
   "bitcore": [
     "https://groestlsight-test.groestlcoin.org"
   ],
-  "blockbook": [],
+  "blockbook": [
+    "https://blockbook-test.groestlcoin.org"
+  ],
   "cooldown": 100
 }