diff --git a/packages/protobuf-demo/package.json b/packages/protobuf-demo/package.json
index b339f175..e5d33de2 100644
--- a/packages/protobuf-demo/package.json
+++ b/packages/protobuf-demo/package.json
@@ -31,7 +31,8 @@
     "test-firefox": "yarn pack-web && karma start --single-run --browsers Firefox",
     "test-chrome": "yarn pack-web && karma start --single-run --browsers ChromeHeadless",
     "test": "yarn build-or-skip && yarn test-node",
-    "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js"
+    "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js",
+    "get-proto": "./scripts/get-proto.sh"
   },
   "devDependencies": {
     "protobufjs": "^6.9.0"
diff --git a/packages/protobuf-demo/scripts/get-proto.sh b/packages/protobuf-demo/scripts/get-proto.sh
new file mode 100755
index 00000000..87ad5e63
--- /dev/null
+++ b/packages/protobuf-demo/scripts/get-proto.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+set -o errexit -o nounset -o pipefail
+command -v shellcheck > /dev/null && shellcheck "$0"
+
+PROTO_DIR="./proto"
+COSMOS_DIR="$PROTO_DIR/cosmos"
+
+mkdir -p $COSMOS_DIR
+
+svn export "https://github.com/cosmos/cosmos-sdk/trunk" "$COSMOS_DIR/cosmos-sdk"
+# svn export "https://github.com/cosmos/cosmos-sdk/tags/v0.38.4" "$COSMOS_DIR/cosmos-sdk"