diff --git a/packages/proto-signing/package.json b/packages/proto-signing/package.json
index ea4dff33..65690062 100644
--- a/packages/proto-signing/package.json
+++ b/packages/proto-signing/package.json
@@ -44,6 +44,8 @@
   },
   "dependencies": {
     "@cosmjs/amino": "^0.25.2",
+    "@cosmjs/crypto": "^0.25.2",
+    "@cosmjs/math": "^0.25.2",
     "long": "^4.0.0",
     "protobufjs": "~6.10.2"
   },
diff --git a/yarn.lock b/yarn.lock
index 47aca5f0..8cad056b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -660,7 +660,9 @@ __metadata:
   resolution: "@cosmjs/proto-signing@workspace:packages/proto-signing"
   dependencies:
     "@cosmjs/amino": ^0.25.2
+    "@cosmjs/crypto": ^0.25.2
     "@cosmjs/encoding": ^0.25.2
+    "@cosmjs/math": ^0.25.2
     "@cosmjs/utils": ^0.25.2
     eslint: ^7.5
     karma: ^6.1.1