diff --git a/README.md b/README.md
index 0c50843..61bf197 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,12 @@ If the token is not in the enviornment yet, set it up by the following commands
 $ export DUCKDNS_TOKEN='example-token'
 ```
 
+A few other settings are available via environment variables:
+
+- use `DUCKDNS_VERBOSE=true` to print more details from the DuckDNS API. Defaults to "false".
+- use `DUCKDNS_DELAY_SECONDS` change how long the script waits for DNS propagation. Defaults to "30".
+
+
 ## Usage
 
 ```
diff --git a/hook.sh b/hook.sh
index 3f01553..826b38e 100755
--- a/hook.sh
+++ b/hook.sh
@@ -12,19 +12,22 @@ if [[ -z "${DUCKDNS_TOKEN}" ]]; then
   echo " - Unable to locate DuckDNS Token in the environment!  Make sure DUCKDNS_TOKEN environment variable is set"
 fi
 
+VERBOSE="${DUCKDNS_VERBOSE:-false}"
+DELAY="${DUCKDNS_DELAY_SECONDS:-30}"
+
 deploy_challenge() {
   local DOMAIN="${1}" TOKEN_FILENAME="${2}" TOKEN_VALUE="${3}"
   echo -n " - Setting TXT record with DuckDNS ${TOKEN_VALUE}"
-  curl "https://www.duckdns.org/update?domains=${DOMAIN}&token=${DUCKDNS_TOKEN}&txt=${TOKEN_VALUE}"
+  curl -s "https://www.duckdns.org/update?domains=${DOMAIN}&token=${DUCKDNS_TOKEN}&txt=${TOKEN_VALUE}&verbose=${VERBOSE}"
   echo
-  echo " - Waiting 30 seconds for DNS to propagate."
-  sleep 30
+  echo " - Waiting $DELAY seconds for DNS to propagate."
+  sleep "$DELAY"
 }
 
 clean_challenge() {
   local DOMAIN="${1}" TOKEN_FILENAME="${2}" TOKEN_VALUE="${3}"
   echo -n " - Removing TXT record from DuckDNS ${DOMAIN}"
-  curl "https://www.duckdns.org/update?domains=${DOMAIN}&token=${DUCKDNS_TOKEN}&txt=removed&clear=true"
+  curl -s "https://www.duckdns.org/update?domains=${DOMAIN}&token=${DUCKDNS_TOKEN}&txt=removed&clear=true&verbose=${VERBOSE}"
   echo
 }