diff --git a/CHANGELOG-npm.md b/CHANGELOG-npm.md
index dfc4016..dffaae0 100644
--- a/CHANGELOG-npm.md
+++ b/CHANGELOG-npm.md
@@ -4,6 +4,7 @@
 
 ## 0.7.0
 - btc: handle error when an input's previous transaction is required but missing
+- btc: add support for regtest
 
 ## 0.6.0
 
diff --git a/CHANGELOG-rust.md b/CHANGELOG-rust.md
index ef3a339..fe36322 100644
--- a/CHANGELOG-rust.md
+++ b/CHANGELOG-rust.md
@@ -4,6 +4,7 @@
 
 ## 0.6.0
 - btc: handle error when an input's previous transaction is required but missing
+- btc: add support for regtest
 - cardano: added support for vote delegation
 
 ## 0.5.0
diff --git a/sandbox/src/Bitcoin.tsx b/sandbox/src/Bitcoin.tsx
index 019d9d2..e6c8636 100644
--- a/sandbox/src/Bitcoin.tsx
+++ b/sandbox/src/Bitcoin.tsx
@@ -5,7 +5,7 @@ import { ShowError } from './Error';
 
 type Props = { bb02: bitbox.PairedBitBox };
 
-const btcCoinOptions = ['btc', 'tbtc', 'ltc', 'tltc'];
+const btcCoinOptions = ['btc', 'tbtc', 'ltc', 'tltc', 'rbtc'];
 
 function BtcXPub({ bb02 } : Props) {
   const [coin, setCoin] = useState<bitbox.BtcCoin>('btc');
@@ -95,6 +95,7 @@ function BtcAddressSimple({ bb02 }: Props) {
       case 'tbtc':
       case 'tltc': return 1;
       case 'ltc': return 2;
+      case 'rbtc': return 1;
     }
   }
 
diff --git a/src/wasm/types.rs b/src/wasm/types.rs
index 5cdb0dc..bfc889d 100644
--- a/src/wasm/types.rs
+++ b/src/wasm/types.rs
@@ -12,7 +12,7 @@ extern "C" {
 const TS_TYPES: &'static str = r#"
 type OnCloseCb = undefined | (() => void);
 type Product = 'unknown' | 'bitbox02-multi' | 'bitbox02-btconly';
-type BtcCoin = 'btc' | 'tbtc' | 'ltc' | 'tltc';
+type BtcCoin = 'btc' | 'tbtc' | 'ltc' | 'tltc' | 'rbtc';
 type BtcFormatUnit = 'default' | 'sat';
 type XPubType = 'tpub' | 'xpub' | 'ypub' | 'zpub' | 'vpub' | 'upub' | 'Vpub' | 'Zpub' | 'Upub' | 'Ypub';
 type Keypath = string | number[];