diff --git a/packages/cosmwasm-stargate/package.json b/packages/cosmwasm-stargate/package.json
index 20695812..bf13a859 100644
--- a/packages/cosmwasm-stargate/package.json
+++ b/packages/cosmwasm-stargate/package.json
@@ -29,11 +29,11 @@
     "format-text": "prettier --write --prose-wrap always --print-width 80 \"./*.md\"",
     "lint": "eslint --max-warnings 0 \"**/*.{js,ts}\"",
     "lint-fix": "eslint --max-warnings 0 \"**/*.{js,ts}\" --fix",
-    "move-types": "shx rm -rf ./types/* && shx mv build/types/* ./types && rm -rf ./types/testdata && shx rm -f ./types/*.spec.d.ts && shx rm ./types/**/*.spec.d.ts",
+    "move-types": "shx rm -rf ./types/* && shx mv build/types/* ./types && rm -rf ./types/testdata && shx rm -f ./types/*.spec.d.ts && shx rm -f ./types/**/*.spec.d.ts",
     "format-types": "prettier --write --loglevel warn \"./types/**/*.d.ts\"",
     "prebuild": "shx rm -rf ./build",
-    "build": "tsc",
-    "postbuild": "yarn move-types && yarn format-types",
+    "build": "tsc && shx mkdir -p build/codec/generated && shx cp ./src/codec/generated/*.js ./build/codec/generated",
+    "postbuild": "shx mkdir -p ./build/types/codec/generated && shx cp ./src/codec/generated/*.d.ts ./build/types/codec/generated && yarn move-types && yarn format-types",
     "build-or-skip": "[ -n \"$SKIP_BUILD\" ] || yarn build",
     "test-node": "node jasmine-testrunner.js",
     "test-firefox": "yarn pack-web && karma start --single-run --browsers Firefox",
@@ -42,7 +42,7 @@
     "coverage": "nyc --reporter=text --reporter=lcov yarn test --quiet",
     "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js",
     "preget-proto": "rm -rf proto",
-    "get-proto": "WASM_REF=v0.12.1 COSMOS_REF=v0.40.0-rc3 ./scripts/get-proto.sh",
+    "get-proto": "WASM_REF=v0.13.0 COSMOS_REF=v0.40.0-rc3 ./scripts/get-proto.sh",
     "predefine-proto": "./scripts/predefine-proto.sh",
     "define-proto": "./scripts/define-proto.sh",
     "postdefine-proto": "prettier --write \"src/codec/generated/codecimpl.*\""