diff --git a/src/index.js b/src/index.js
index 40b98cd..fe9d300 100644
--- a/src/index.js
+++ b/src/index.js
@@ -21,16 +21,10 @@ const ajvAddFormats = require('ajv-formats')
 // eslint-disable-next-line node/no-unpublished-require
 const schema = require('../schema/app.config.yaml.schema.json')
 
-// give or take daylight savings, and leap seconds ...
-const AboutAWeekInSeconds = '604800'
 const defaults = {
   defaultAppHostname: 'adobeio-static.net',
   defaultTvmUrl: 'https://firefly-tvm.adobe.io',
   defaultOwApihost: 'https://adobeioruntime.net',
-  defaultHTMLCacheDuration: '60',
-  defaultJSCacheDuration: AboutAWeekInSeconds,
-  defaultCSSCacheDuration: AboutAWeekInSeconds,
-  defaultImageCacheDuration: AboutAWeekInSeconds,
   stageAppHostname: 'dev.runtime.adobe.io',
   USER_CONFIG_FILE: 'app.config.yaml',
   LEGACY_RUNTIME_MANIFEST: 'manifest.yml',
@@ -688,10 +682,10 @@ async function buildSingleConfig (configName, singleUserConfig, commonConfig, in
 
   config.app.defaultHostname = getCliEnv() === STAGE_ENV ? defaults.stageAppHostname : defaults.defaultAppHostname
   config.app.hostname = singleUserConfig.hostname || config.app.defaultHostname
-  config.app.htmlCacheDuration = singleUserConfig.htmlcacheduration || defaults.defaultHTMLCacheDuration
-  config.app.jsCacheDuration = singleUserConfig.jscacheduration || defaults.defaultJSCacheDuration
-  config.app.cssCacheDuration = singleUserConfig.csscacheduration || defaults.defaultCSSCacheDuration
-  config.app.imageCacheDuration = singleUserConfig.imagecacheduration || defaults.defaultImageCacheDuration
+  config.app.htmlCacheDuration = singleUserConfig.htmlcacheduration
+  config.app.jsCacheDuration = singleUserConfig.jscacheduration
+  config.app.cssCacheDuration = singleUserConfig.csscacheduration
+  config.app.imageCacheDuration = singleUserConfig.imagecacheduration
   config.hooks = singleUserConfig.hooks || {}
 
   config.imsOrgId = commonConfig.imsOrgId
diff --git a/test/data-mocks/config-loader.js b/test/data-mocks/config-loader.js
index 6eb135c..1750ef4 100644
--- a/test/data-mocks/config-loader.js
+++ b/test/data-mocks/config-loader.js
@@ -146,10 +146,10 @@ const excSingleConfig = {
       dist: winCompat(`${root}dist/dx-excshell-1`),
       defaultHostname: 'adobeio-static.net',
       hostname: 'adobeio-static.net',
-      htmlCacheDuration: '60',
-      jsCacheDuration: '604800',
-      cssCacheDuration: '604800',
-      imageCacheDuration: '604800'
+      htmlCacheDuration: undefined,
+      jsCacheDuration: undefined,
+      cssCacheDuration: undefined,
+      imageCacheDuration: undefined
     },
     ow,
     s3: {
@@ -197,10 +197,10 @@ const nuiSingleConfig = {
       dist: winCompat(`${root}dist/dx-asset-compute-worker-1`),
       defaultHostname: 'adobeio-static.net',
       hostname: 'adobeio-static.net',
-      htmlCacheDuration: '60',
-      jsCacheDuration: '604800',
-      cssCacheDuration: '604800',
-      imageCacheDuration: '604800'
+      htmlCacheDuration: undefined,
+      jsCacheDuration: undefined,
+      cssCacheDuration: undefined,
+      imageCacheDuration: undefined
     },
     ow,
     s3: {},
@@ -246,10 +246,10 @@ const applicationSingleConfig = {
       dist: winCompat(`${root}dist/application`),
       defaultHostname: 'adobeio-static.net',
       hostname: 'adobeio-static.net',
-      htmlCacheDuration: '60',
-      jsCacheDuration: '604800',
-      cssCacheDuration: '604800',
-      imageCacheDuration: '604800'
+      htmlCacheDuration: undefined,
+      jsCacheDuration: undefined,
+      cssCacheDuration: undefined,
+      imageCacheDuration: undefined
     },
     ow,
     s3: {
@@ -304,10 +304,10 @@ const applicationNoActionsSingleConfig = {
       dist: winCompat(`${root}dist/application`),
       defaultHostname: 'adobeio-static.net',
       hostname: 'adobeio-static.net',
-      htmlCacheDuration: '60',
-      jsCacheDuration: '604800',
-      cssCacheDuration: '604800',
-      imageCacheDuration: '604800'
+      htmlCacheDuration: undefined,
+      jsCacheDuration: undefined,
+      cssCacheDuration: undefined,
+      imageCacheDuration: undefined
     },
     ow,
     s3: {