diff --git a/.npmrc b/.npmrc
index 84c5fa5cbe7a7b7b6c877a3ec5d4db3e17b90826..fcdbb5524a8bff8905b96f274821a3c8f1c5f6f4 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1,2 +1 @@
 @ghsc:registry=https://code.usgs.gov/api/v4/packages/npm/
-@usgs-cdk:registry=https://code.chs.usgs.gov/api/v4/packages/npm/
diff --git a/libs/aws/reverse-proxy/update-proxy.ts b/libs/aws/reverse-proxy/update-proxy.ts
index 0faa8c8f335807ca59ef3a329ec018607b34a7bf..4cab412b11566b26f52719e9a9fb8354f9d5be3e 100644
--- a/libs/aws/reverse-proxy/update-proxy.ts
+++ b/libs/aws/reverse-proxy/update-proxy.ts
@@ -1,5 +1,4 @@
-import {usgsSsm} from '@usgs-cdk/lib';
-import {custom_resources as cr, Stack} from 'aws-cdk-lib';
+import {aws_ssm as ssm, custom_resources as cr, Stack} from 'aws-cdk-lib';
 import {Construct} from 'constructs';
 import * as fs from 'fs';
 import * as path from 'path';
@@ -36,9 +35,6 @@ export interface UpdateProxyProps {
   scope: Construct;
   /** SSM parameter name for reverse proxy topic arn */
   topicArnSsmName: string;
-
-  /** Region of SSM parameter */
-  parameterRegion?: string;
 }
 
 /**
@@ -59,10 +55,9 @@ export function updateProxy(props: UpdateProxyProps): cr.AwsCustomResource {
     };
   });
 
-  const topicArn = usgsSsm.StringParameter.valueFromLookup(
+  const topicArn = ssm.StringParameter.valueFromLookup(
     props.scope,
-    props.topicArnSsmName,
-    props.parameterRegion
+    props.topicArnSsmName
   );
 
   const {bundlingRequired, stackName} = Stack.of(props.scope);
@@ -74,7 +69,6 @@ export function updateProxy(props: UpdateProxyProps): cr.AwsCustomResource {
 
   const sdkCall: cr.AwsSdkCall = {
     action: 'publish',
-    region: props.parameterRegion,
     service: 'SNS',
     parameters: {
       Message: JSON.stringify(message),
diff --git a/package-lock.json b/package-lock.json
index 9ad108bb5f152900b7502ae8a09211e82a9b0f2b..0ca61517964650405a1c58dc1c1c162c22cd8665 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,6 @@
         "@types/geojson": "^7946.0.13",
         "@types/leaflet": "^1.9.0",
         "@types/plotly.js": "^1.54.22",
-        "@usgs-cdk/lib": "^1.4.1-cdk-2-135-0.1",
         "aws-cdk-lib": "2.135.0",
         "change-case": "^4.1.2",
         "constructs": "^10.3.0",
@@ -718,16 +717,6 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
-    "node_modules/@usgs-cdk/lib": {
-      "version": "1.4.1-cdk-2-135-0.1",
-      "resolved": "https://code.chs.usgs.gov/api/v4/projects/6739/packages/npm/@usgs-cdk/lib/-/@usgs-cdk/lib-1.4.1-cdk-2-135-0.1.tgz",
-      "integrity": "sha1-Dkfzj4sqTBA/FfQ6IN+NbuhO/ZA=",
-      "peerDependencies": {
-        "aws-cdk-lib": "2.135.0",
-        "constructs": "^10.2.70",
-        "fast-deep-equal": "^3.1.3"
-      }
-    },
     "node_modules/abs-svg-path": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/abs-svg-path/-/abs-svg-path-0.1.1.tgz",
@@ -2565,7 +2554,8 @@
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
-      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="
+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
+      "dev": true
     },
     "node_modules/fast-diff": {
       "version": "1.3.0",
diff --git a/package.json b/package.json
index ffb71727f482f9ef52647c709b38ee96d17baa16..f8c120924765666833fce3ddd04ea7dd4fa81275 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,6 @@
     "@types/geojson": "^7946.0.13",
     "@types/leaflet": "^1.9.0",
     "@types/plotly.js": "^1.54.22",
-    "@usgs-cdk/lib": "^1.4.1-cdk-2-135-0.1",
     "aws-cdk-lib": "2.135.0",
     "change-case": "^4.1.2",
     "constructs": "^10.3.0",