diff --git a/docker/build.py b/docker/build.py
index 9dd64921..e63ec1b4 100755
--- a/docker/build.py
+++ b/docker/build.py
@@ -40,7 +40,7 @@ class Image:
     value="1.23.4-bullseye",
 )
 
-BITCOIN_VERSION = "28.0"
+BITCOIN_VERSION = "28.1"
 LITECOIN_VERSION = "0.21.4"
 ELEMENTS_VERSION = "23.2.4"
 GETH_VERSION = "1.14.12"
@@ -108,7 +108,7 @@ class Image:
         ],
     ),
     "regtest": Image(
-        tag="4.6.2",
+        tag="4.6.3",
         arguments=[
             UBUNTU_VERSION,
             BITCOIN_BUILD_ARG,
diff --git a/docker/regtest/startRegtest.sh b/docker/regtest/startRegtest.sh
index f397288f..2c390754 100755
--- a/docker/regtest/startRegtest.sh
+++ b/docker/regtest/startRegtest.sh
@@ -29,7 +29,7 @@ docker run \
   -p 9735:9735 \
   -p 9293:9293 \
   -p 9292:9292 \
-  boltz/regtest:4.6.2
+  boltz/regtest:4.6.3
 
 docker exec regtest bash -c "cp /root/.lightning/regtest/*.pem /root/.lightning/regtest/certs"
 docker exec regtest chmod -R 777 /root/.lightning/regtest/certs
diff --git a/lib/VersionCheck.ts b/lib/VersionCheck.ts
index 5d35fa2c..acbc139b 100644
--- a/lib/VersionCheck.ts
+++ b/lib/VersionCheck.ts
@@ -78,7 +78,7 @@ class VersionCheck {
   > = {
     [ChainClient.serviceName]: {
       minimal: 220000,
-      maximal: 280000,
+      maximal: 280100,
     },
     [ClnClient.serviceName]: {
       minimal: '24.11',
@@ -130,10 +130,10 @@ class VersionCheck {
         if (version.startsWith('v')) {
           sanitizedVersion = sanitizedVersion.slice(1);
         }
-        if (version.endsWith(ClnClient.moddedVersionSuffix)) {
+        if (version.includes(ClnClient.moddedVersionSuffix)) {
           sanitizedVersion = sanitizedVersion.slice(
             0,
-            -ClnClient.moddedVersionSuffix.length,
+            sanitizedVersion.indexOf(ClnClient.moddedVersionSuffix),
           );
         }
 
diff --git a/lib/lightning/cln/ClnClient.ts b/lib/lightning/cln/ClnClient.ts
index 2b1928ba..37060e5d 100644
--- a/lib/lightning/cln/ClnClient.ts
+++ b/lib/lightning/cln/ClnClient.ts
@@ -46,7 +46,7 @@ class ClnClient
 {
   public static readonly serviceName = 'CLN';
   public static readonly serviceNameHold = 'hold';
-  public static readonly moddedVersionSuffix = '-modded';
+  public static readonly moddedVersionSuffix = '-';
 
   public static readonly paymentPendingError = 'payment already pending';