diff --git a/modules/chronik-client/README.md b/modules/chronik-client/README.md
--- a/modules/chronik-client/README.md
+++ b/modules/chronik-client/README.md
@@ -103,3 +103,4 @@
 -   0.24.0 - Support `subscribeToAddress` and `unsubscribeFromAddress` methods in the `ChronikClientNode` websocket
 -   0.25.0 - Organize websocket subscriptions for `ChronikClientNode` under object instead of array
 -   0.25.1 - Move `ecashaddrjs` from dev dependency to dependency
+-   0.25.2 - Fix this package to work in the browser without requiring `Buffer` shim
diff --git a/modules/chronik-client/package-lock.json b/modules/chronik-client/package-lock.json
--- a/modules/chronik-client/package-lock.json
+++ b/modules/chronik-client/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "chronik-client",
-    "version": "0.25.1",
+    "version": "0.25.2",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "chronik-client",
-            "version": "0.25.1",
+            "version": "0.25.2",
             "license": "MIT",
             "dependencies": {
                 "@types/ws": "^8.2.1",
diff --git a/modules/chronik-client/package.json b/modules/chronik-client/package.json
--- a/modules/chronik-client/package.json
+++ b/modules/chronik-client/package.json
@@ -1,6 +1,6 @@
 {
     "name": "chronik-client",
-    "version": "0.25.1",
+    "version": "0.25.2",
     "description": "A client for accessing the Chronik Indexer API",
     "main": "dist/index.js",
     "types": "dist/index.d.ts",
diff --git a/modules/chronik-client/src/ChronikClient.ts b/modules/chronik-client/src/ChronikClient.ts
--- a/modules/chronik-client/src/ChronikClient.ts
+++ b/modules/chronik-client/src/ChronikClient.ts
@@ -356,9 +356,11 @@
             return;
         }
         const data =
-            wsMsg.data instanceof Buffer
-                ? (wsMsg.data as Uint8Array)
-                : new Uint8Array(await (wsMsg.data as Blob).arrayBuffer());
+            typeof window === 'undefined'
+                ? // NodeJS
+                  (wsMsg.data as Uint8Array)
+                : // Browser
+                  new Uint8Array(await (wsMsg.data as Blob).arrayBuffer());
         const msg = proto.SubscribeMsg.decode(data);
         if (msg.error) {
             this.onMessage({
diff --git a/modules/chronik-client/src/ChronikClientNode.ts b/modules/chronik-client/src/ChronikClientNode.ts
--- a/modules/chronik-client/src/ChronikClientNode.ts
+++ b/modules/chronik-client/src/ChronikClientNode.ts
@@ -539,9 +539,11 @@
             return;
         }
         const data =
-            wsMsg.data instanceof Buffer
-                ? (wsMsg.data as Uint8Array)
-                : new Uint8Array(await (wsMsg.data as Blob).arrayBuffer());
+            typeof window === 'undefined'
+                ? // NodeJS
+                  (wsMsg.data as Uint8Array)
+                : // Browser
+                  new Uint8Array(await (wsMsg.data as Blob).arrayBuffer());
         const msg = proto.WsMsg.decode(data);
         if (typeof msg.error !== 'undefined') {
             this.onMessage({ type: 'Error', ...msg.error });