diff --git a/4-3-XRay/demo-app/service-b/package-lock.json b/4-3-XRay/demo-app/service-b/package-lock.json
index 676ad2f..5696078 100644
--- a/4-3-XRay/demo-app/service-b/package-lock.json
+++ b/4-3-XRay/demo-app/service-b/package-lock.json
@@ -4,6 +4,122 @@
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   "requires": true,
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+      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.15.1.tgz",
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+      "resolved": "https://registry.npmjs.org/async-hook-jl/-/async-hook-jl-1.7.6.tgz",
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-        "shimmer": "1.2.0"
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@@ -50,44 +165,52 @@
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+        "emitter-listener": "^1.0.1",
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+        "postgres-bytea": "~3.0.0",
+        "postgres-date": "~2.0.1",
+        "postgres-interval": "^3.0.0",
+        "postgres-range": "^1.1.1"
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+      "resolved": "https://registry.npmjs.org/postgres-array/-/postgres-array-3.0.2.tgz",
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+      "resolved": "https://registry.npmjs.org/postgres-bytea/-/postgres-bytea-3.0.0.tgz",
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+    "postgres-date": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/postgres-date/-/postgres-date-2.0.1.tgz",
+      "integrity": "sha512-YtMKdsDt5Ojv1wQRvUhnyDJNSr2dGIC96mQVKz7xufp07nfuFONzdaowrMHjlAzY6GDLd4f+LUHHAAM1h4MdUw=="
+    },
+    "postgres-interval": {
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+      "resolved": "https://registry.npmjs.org/postgres-interval/-/postgres-interval-3.0.0.tgz",
+      "integrity": "sha512-BSNDnbyZCXSxgA+1f5UU2GmwhoI0aU5yMxRGO8CdFEcY2BQF9xm/7MqKnYoM1nJDk8nONNWDk9WeSmePFhQdlw=="
+    },
+    "postgres-range": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/postgres-range/-/postgres-range-1.1.3.tgz",
+      "integrity": "sha512-VdlZoocy5lCP0c/t66xAfclglEapXPCIVhqqJRncYpvbCgImF0w67aPKfbqUMr72tO2k5q0TdTZwCLjPTI6C9g=="
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@@ -478,9 +649,12 @@
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-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
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+      "version": "7.5.3",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.3.tgz",
+      "integrity": "sha512-QBlUtyVk/5EeHbi7X0fw6liDZc7BBmEaSYn01fMU1OUYbf6GPsbTtd8WmnqbI20SeycoHSeiybkE/q1Q+qlThQ==",
+      "requires": {
+        "lru-cache": "^6.0.0"
+      }
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     "send": {
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@@ -519,20 +693,25 @@
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+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/shimmer/-/shimmer-1.2.1.tgz",
+      "integrity": "sha512-sQTKC1Re/rM6XyFM6fIAGHRPVGvyXfgzIDvzoq608vM+jeyVD0Tu1E6Np0Kc2zAIFWIj963V2800iF/9LPieQw=="
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-      "integrity": "sha1-VHxws0fo0ytOEI6hoqFZ5f3eGcA="
+    "stack-chain": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/stack-chain/-/stack-chain-1.3.7.tgz",
+      "integrity": "sha512-D8cWtWVdIe/jBA7v5p5Hwl5yOSOrmZPWDPe2KxQ5UAGD+nxbxU0lKXA4h85Ta6+qgdKVL3vUxsbIZjc1kBG7ug=="
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     },
+    "tslib": {
+      "version": "2.5.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.5.3.tgz",
+      "integrity": "sha512-mSxlJJwl3BMEQCUNnxXBU9jP4JBktcEGhURcPR6VQVlnP0FdDEsIaz0C35dXNGLyRfrATNofF0F5p2KPxQgB+w=="
+    },
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       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
@@ -542,11 +721,6 @@
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-      "integrity": "sha1-Tz+1OxBuYJf8+ctBCfKl6b36UCI="
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@@ -576,19 +750,6 @@
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-        "colors": "1.0.3",
-        "cycle": "1.0.3",
-        "eyes": "0.1.8",
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@@ -605,6 +766,11 @@
       "requires": {
         "lodash": "4.17.5"
       }
+    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
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   }
 }
diff --git a/4-3-XRay/demo-app/service-b/package.json b/4-3-XRay/demo-app/service-b/package.json
index 20b0e2d..09645eb 100644
--- a/4-3-XRay/demo-app/service-b/package.json
+++ b/4-3-XRay/demo-app/service-b/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "aws-sdk": "^2.221.1",
-    "aws-xray-sdk": "^1.2.0",
+    "aws-xray-sdk": "^3.5.0",
     "express": "^4.16.3"
   }
 }