diff --git a/README.md b/README.md
index 13c0021..606d17b 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,5 @@ Change brightness:
 
 ## Requirements
 
-*curl* version 7.82.0 or newer.
 You have to be connected to the local network.
 
diff --git a/wled b/wled
index 62eb85b..fcb3405 100755
--- a/wled
+++ b/wled
@@ -31,14 +31,21 @@ commands:
     -b,--brightness [1-255] set brightness"
 }
 
-curl_cmd() {
-    curl --silent --show-error --fail --ipv4 --max-filesize 32K "$@"
+curl_fetch() {
+    curl --silent --show-error --fail --ipv4 --max-filesize 32768 \
+         --max-redirs 0 --header 'Accept: application/json' "$@"
+}
+
+curl_send() {
+    curl --silent --show-error --fail --ipv4 --max-filesize 1024 \
+         --max-redirs 0 --header 'Accept: application/json' \
+         --header 'Content-Type: application/json' "$@"
 }
 
 active_preset() {
     # Find number of active preset. API returns -1 if none is active, we return
     # an empty string.
-    curl_cmd "http://$1/json" | \
+    curl_fetch "http://$1/json" | \
         # -1 will be a no-match.
         sed -n 's/.*"ps"[[:space:]]*:[[:space:]]*\(1\?[0-9]\).*/\1/p'
 }
@@ -69,10 +76,10 @@ esac
 # Parse and execute command argument.
 case "$2" in
     on) # Switch on.
-        api_resp=$(curl_cmd --json '{"on":true}' "http://$wled_host/json")
+        api_resp=$(curl_send --data '{"on":true}' "http://$wled_host/json")
     ;;
     off) # Switch off.
-        api_resp=$(curl_cmd --json '{"on":false}' "http://$wled_host/json")
+        api_resp=$(curl_send --data '{"on":false}' "http://$wled_host/json")
     ;;
     -b|--brightness) # Set brightness.
         if test -z "$3"; then
@@ -88,15 +95,15 @@ case "$2" in
             echo "Error: parameter for brightness is out of range." >&2
             exit 1
         fi
-        api_resp=$(curl_cmd --json "{'bri':$bright}" "http://$wled_host/json")
+        api_resp=$(curl_send --data "{'bri':$bright}" "http://$wled_host/json")
     ;;
     [1-9]|1[0-7]) # Switch to preset.
-        api_resp=$(curl_cmd --json "{'ps':$2}" "http://$wled_host/json")
+        api_resp=$(curl_send --data "{'ps':$2}" "http://$wled_host/json")
     ;;
     l|list) # List presets.
         printf "loading ...\r"
         active_ps=$(active_preset "$wled_host")
-        curl_cmd "http://$wled_host/presets.json" | \
+        curl_fetch "http://$wled_host/presets.json" | \
             # Split into lines - one line per preset.
             sed --sandbox 's/"1\?[0-9]"[[:space:]]*:/\n&/g' | \
             # Extract number and name of every preset. Right-align numbers.
@@ -115,7 +122,7 @@ case "$2" in
         exit $?
     ;;
     dump) # Dump JSON response from API.
-        curl_cmd -w '\n' "http://$wled_host/json"
+        curl_fetch -w '\n' "http://$wled_host/json"
         exit 0
     ;;
     "") # Missing command.