diff --git a/dnsapi2.md b/dnsapi2.md
index 5e5c7ba..87ca935 100644
--- a/dnsapi2.md
+++ b/dnsapi2.md
@@ -2799,6 +2799,7 @@ You need a **new** personal access token from the **Hetzner Cloud** and must set
 * `HETZNER_TOKEN` *(required)* — Personal Access Token for the Cloud DNS API (**read & write**).
 * `HETZNER_TTL` *(optional)* — TTL in seconds for TXT RRsets (default **120**).
 * `HETZNER_API` *(optional)* — Override API base URL (default `https://api.hetzner.cloud/v1`).
+* `HETZNER_MAX_ATTEMPTS` *(optional)* — Number of 1-second polls to wait for asynchronous Hetzner actions (default 120). Increase this if your zone needs more time to finish changes.
 
 **Example**
 
@@ -2807,6 +2808,7 @@ export HETZNER_TOKEN="your_token_here"
 # optional:
 # export HETZNER_TTL=120
 # export HETZNER_API="https://api.hetzner.cloud/v1"
+# export HETZNER_MAX_ATTEMPTS=120
 
 acme.sh --issue --dns dns_hetznercloud -d test.example.com
 ```