diff --git a/packages/eventstream-handler-node/package.json b/packages/eventstream-handler-node/package.json
index c356dc1b53eb2..e98c769098266 100644
--- a/packages/eventstream-handler-node/package.json
+++ b/packages/eventstream-handler-node/package.json
@@ -26,6 +26,7 @@
   "devDependencies": {
     "@aws-sdk/util-utf8-node": "*",
     "@tsconfig/recommended": "1.0.1",
+    "@types/node": "^10.0.0",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.7.0",
     "rimraf": "3.0.2",
diff --git a/packages/eventstream-serde-node/package.json b/packages/eventstream-serde-node/package.json
index 56bfd5c93a4b8..7ef6a114412c3 100644
--- a/packages/eventstream-serde-node/package.json
+++ b/packages/eventstream-serde-node/package.json
@@ -27,6 +27,7 @@
   "devDependencies": {
     "@aws-sdk/util-utf8-node": "*",
     "@tsconfig/recommended": "1.0.1",
+    "@types/node": "^12.0.0",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.7.0",
     "rimraf": "3.0.2",
diff --git a/packages/eventstream-serde-universal/package.json b/packages/eventstream-serde-universal/package.json
index 32b70d29813e4..7c2962736c80f 100644
--- a/packages/eventstream-serde-universal/package.json
+++ b/packages/eventstream-serde-universal/package.json
@@ -26,6 +26,7 @@
   "devDependencies": {
     "@aws-sdk/util-utf8-node": "*",
     "@tsconfig/recommended": "1.0.1",
+    "@types/node": "^10.0.0",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.7.0",
     "rimraf": "3.0.2",
diff --git a/packages/smithy-client/package.json b/packages/smithy-client/package.json
index 35f23079c2808..dfc0d4e54686f 100644
--- a/packages/smithy-client/package.json
+++ b/packages/smithy-client/package.json
@@ -44,6 +44,7 @@
   },
   "devDependencies": {
     "@tsconfig/recommended": "1.0.1",
+    "@types/node": "^10.0.0",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.7.0",
     "rimraf": "3.0.2",