diff --git a/Dockerfile b/Dockerfile
index fe558cb..56c4441 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,6 +32,7 @@ ENV CLOUDFLARE_CONFIG=/app/config.yaml
 ENV PUID=1001
 ENV PGID=1001
 ENV NODE_ENV=production
+ENV CRON='*/5 * * * *'
 
 COPY --from=builder /packages /app/packages/
 COPY package.json package-lock.json /app/
diff --git a/README.md b/README.md
index de12c47..05afa8f 100644
--- a/README.md
+++ b/README.md
@@ -202,17 +202,18 @@ ipv6:
 
 > If configuration file is found, environment variables are ignored.
 
-| Parameters   | Default | Description                                                                                                                |
-| ------------ | ------- | -------------------------------------------------------------------------------------------------------------------------- |
-| \*ZONE       |         | Domain, e.g. `example.com`.                                                                                                |
-| \*HOST       |         | DNS record to be updated, e.g. `example.com`, `subdomain.example.com`.                                                     |
-| \*EMAIL      |         | Cloudflare Email                                                                                                           |
-| \*API        |         | Cloudflare API key                                                                                                         |
-| PROXY        | true    | Whether the record is receiving the performance and security benefits of Cloudflare. `true` to enable; `false` to disable. |
-| FORCE_CREATE |         | When set, a record will be created if one does not exist already.                                                          |
-| IPV6         |         | When set, update IPv6 instead of IPv4.                                                                                     |
-| PUID         |         | User ID used by the script.                                                                                                |
-| PGID         |         | Group ID used by the script.                                                                                               |
+| Parameters   | Default           | Description                                                                                                                |
+| ------------ | ----------------- | -------------------------------------------------------------------------------------------------------------------------- |
+| \*ZONE       |                   | Domain, e.g. `example.com`.                                                                                                |
+| \*HOST       |                   | DNS record to be updated, e.g. `example.com`, `subdomain.example.com`.                                                     |
+| \*EMAIL      |                   | Cloudflare Email                                                                                                           |
+| \*API        |                   | Cloudflare API key                                                                                                         |
+| PROXY        | true              | Whether the record is receiving the performance and security benefits of Cloudflare. `true` to enable; `false` to disable. |
+| FORCE_CREATE |                   | When set, a record will be created if one does not exist already.                                                          |
+| IPV6         |                   | When set, update IPv6 instead of IPv4.                                                                                     |
+| PUID         |                   | User ID used by the script.                                                                                                |
+| PGID         |                   | Group ID used by the script.                                                                                               |
+| CRON         | \*\/5 \* \* \* \* | DDNS update schedule.                                                                                                      |
 
 \* These parameters are required.
 
diff --git a/docker/root/etc/cont-init.d/11-cron b/docker/root/etc/cont-init.d/11-cron
new file mode 100644
index 0000000..2918127
--- /dev/null
+++ b/docker/root/etc/cont-init.d/11-cron
@@ -0,0 +1,5 @@
+#!/usr/bin/with-contenv sh
+
+echo "Setting crontab to ${CRON}"
+echo "${CRON} /app/cloudflare.sh" >> /etc/crontabs/root
+chmod 600 /etc/crontabs/root
diff --git a/docker/root/etc/crontabs/root b/docker/root/etc/crontabs/root
deleted file mode 100644
index b1e1768..0000000
--- a/docker/root/etc/crontabs/root
+++ /dev/null
@@ -1 +0,0 @@
-*/5 * * * * /app/cloudflare.sh
diff --git a/package-lock.json b/package-lock.json
index b5549ce..b4941b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10960,7 +10960,7 @@
     },
     "node_modules/npm/node_modules/lodash._baseindexof": {
       "version": "3.1.0",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT"
     },
@@ -10976,19 +10976,19 @@
     },
     "node_modules/npm/node_modules/lodash._bindcallback": {
       "version": "3.0.1",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT"
     },
     "node_modules/npm/node_modules/lodash._cacheindexof": {
       "version": "3.0.2",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT"
     },
     "node_modules/npm/node_modules/lodash._createcache": {
       "version": "3.1.2",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT",
       "dependencies": {
@@ -11003,7 +11003,7 @@
     },
     "node_modules/npm/node_modules/lodash._getnative": {
       "version": "3.9.1",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT"
     },
@@ -11021,7 +11021,7 @@
     },
     "node_modules/npm/node_modules/lodash.restparam": {
       "version": "3.6.1",
-      "dev": true,
+      "extraneous": true,
       "inBundle": true,
       "license": "MIT"
     },
@@ -25121,7 +25121,7 @@
         "lodash._baseindexof": {
           "version": "3.1.0",
           "bundled": true,
-          "dev": true
+          "extraneous": true
         },
         "lodash._baseuniq": {
           "version": "4.6.0",
@@ -25135,17 +25135,17 @@
         "lodash._bindcallback": {
           "version": "3.0.1",
           "bundled": true,
-          "dev": true
+          "extraneous": true
         },
         "lodash._cacheindexof": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "extraneous": true
         },
         "lodash._createcache": {
           "version": "3.1.2",
           "bundled": true,
-          "dev": true,
+          "extraneous": true,
           "requires": {
             "lodash._getnative": "^3.0.0"
           }
@@ -25158,7 +25158,7 @@
         "lodash._getnative": {
           "version": "3.9.1",
           "bundled": true,
-          "dev": true
+          "extraneous": true
         },
         "lodash._root": {
           "version": "3.0.1",
@@ -25173,7 +25173,7 @@
         "lodash.restparam": {
           "version": "3.6.1",
           "bundled": true,
-          "dev": true
+          "extraneous": true
         },
         "lodash.union": {
           "version": "4.6.0",