diff --git a/lib/config.ts b/lib/config.ts
index 041c3b7..ce35a3d 100644
--- a/lib/config.ts
+++ b/lib/config.ts
@@ -9,7 +9,7 @@ import { parsePageId } from 'notion-utils'
 import { getSiteConfig, getEnv } from './get-config-value'
 
 export const rootNotionPageId: string = parsePageId(
-  getSiteConfig('rootNotionPageId', 'ROOT_NOTION_PAGE_ID'),
+  getSiteConfig('rootNotionPageId'),
   { uuid: false }
 )
 
@@ -19,84 +19,57 @@ if (!rootNotionPageId) {
 
 // if you want to restrict pages to a single notion workspace (optional)
 export const rootNotionSpaceId: string | null = parsePageId(
-  getSiteConfig('rootNotionSpaceId', 'ROOT_NOTION_SPACE_ID', null),
+  getSiteConfig('rootNotionSpaceId', null),
   { uuid: true }
 )
 
 // general site config
-export const name: string = getSiteConfig('name', 'SITE_NAME')
-export const author: string = getSiteConfig('author', 'SITE_AUTHOR')
-export const domain: string = getSiteConfig('domain', 'SITE_DOMAIN')
-export const description: string = getSiteConfig(
-  'description',
-  'SITE_DESCRIPTION',
-  'Notion Blog'
-)
+export const name: string = getSiteConfig('name')
+export const author: string = getSiteConfig('author')
+export const domain: string = getSiteConfig('domain')
+export const description: string = getSiteConfig('description', 'Notion Blog')
 
 // social accounts
-export const twitter: string | null = getSiteConfig(
-  'twitter',
-  'SITE_TWITTER',
-  null
-)
-export const github: string | null = getSiteConfig(
-  'github',
-  'SITE_GITHUB',
-  null
-)
-export const linkedin: string | null = getSiteConfig(
-  'linkedin',
-  'SITE_LINKEDIN',
-  null
-)
+export const twitter: string | null = getSiteConfig('twitter', null)
+export const github: string | null = getSiteConfig('github', null)
+export const linkedin: string | null = getSiteConfig('linkedin', null)
 
 export const socialImageTitle: string | null = getSiteConfig(
   'socialImageTitle',
-  'SOCIAL_IMAGE_TITLE',
   null
 )
 export const socialImageSubtitle: string | null = getSiteConfig(
   'socialImageSubtitle',
-  'SOCIAL_IMAGE_SUBTITLE',
   null
 )
 
 // default notion values for site-wide consistency (optional; may be overridden on a per-page basis)
 export const defaultPageIcon: string | null = getSiteConfig(
   'defaultPageIcon',
-  'DEFAULT_PAGE_ICON',
   null
 )
 export const defaultPageCover: string | null = getSiteConfig(
   'defaultPageCover',
-  'DEFAULT_PAGE_COVER',
   null
 )
 export const defaultPageCoverPosition: number = getSiteConfig(
   'defaultPageCoverPosition',
-  null,
   0.5
 )
 
 // Optional utteranc.es comments via GitHub issue comments
 export const utterancesGitHubRepo: string | null = getSiteConfig(
   'utterancesGitHubRepo',
-  'UTTERANCES_GITHUB_REPO',
   null
 )
 
 // Optional image CDN host to proxy all image requests through
-export const imageCDNHost: string | null = getSiteConfig(
-  'imageCDNHost',
-  'IMAGE_CDN_HOST',
-  null
-)
+export const imageCDNHost: string | null = getSiteConfig('imageCDNHost', null)
 
 // Optional whether or not to enable support for LQIP preview images
 // (requires a Google Firebase collection)
 export const isPreviewImageSupportEnabled: boolean = getSiteConfig(
   'isPreviewImageSupportEnabled',
-  null,
   false
 )
 
@@ -106,7 +79,6 @@ export const isDev =
 // where it all starts -- the site's root Notion page
 export const includeNotionIdInUrls: boolean = getSiteConfig(
   'includeNotionIdInUrls',
-  'INCLUDE_NOTION_ID_IN_URLS',
   !!isDev
 )
 
diff --git a/lib/get-config-value.ts b/lib/get-config-value.ts
index b57245c..a702150 100644
--- a/lib/get-config-value.ts
+++ b/lib/get-config-value.ts
@@ -1,23 +1,27 @@
-import siteConfig from '../site.config'
+import rawSiteConfig from '../site.config'
 
-if (!siteConfig) {
+if (!rawSiteConfig) {
   throw new Error(`Config error: invalid site.config.js`)
 }
 
-export function getSiteConfig<T>(
-  key: string,
-  envKey?: string,
-  defaultValue?: T
-): T {
-  if (envKey) {
-    // allow environment variables to override site.config.js (optional)
-    const envValue = process.env[envKey]
+// TODO: allow environment variables to override site.config.js
+let siteConfigOverrides
 
-    if (envValue !== undefined) {
-      return (envValue as unknown) as T
-    }
+try {
+  if (process.env.NEXT_PUBLIC_SITE_CONFIG) {
+    siteConfigOverrides = JSON.parse(process.env.NEXT_PUBLIC_SITE_CONFIG)
   }
+} catch (err) {
+  console.error('Invalid config "NEXT_PUBLIC_SITE_CONFIG" failed to parse')
+  throw err
+}
 
+const siteConfig = {
+  ...rawSiteConfig,
+  ...siteConfigOverrides
+}
+
+export function getSiteConfig<T>(key: string, defaultValue?: T): T {
   const value = siteConfig[key]
 
   if (value !== undefined) {