diff --git a/packages/stargate/package.json b/packages/stargate/package.json
index 0a665910..3b005e92 100644
--- a/packages/stargate/package.json
+++ b/packages/stargate/package.json
@@ -51,7 +51,8 @@
     "@cosmjs/tendermint-rpc": "^0.25.2",
     "@cosmjs/utils": "^0.25.2",
     "long": "^4.0.0",
-    "protobufjs": "~6.10.2"
+    "protobufjs": "~6.10.2",
+    "xstream": "^11.14.0"
   },
   "devDependencies": {
     "eslint": "^7.5",
diff --git a/yarn.lock b/yarn.lock
index 4205f5a3..8e0cffc7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -729,6 +729,7 @@ __metadata:
     typedoc: ^0.20
     typescript: ~4.0
     webpack: ^5.32.0
+    xstream: ^11.14.0
   languageName: unknown
   linkType: soft