diff --git a/auth-hook.sh b/auth-hook.sh
index 1af3f95..4574403 100755
--- a/auth-hook.sh
+++ b/auth-hook.sh
@@ -1,7 +1,7 @@
 # ownDynDNS auth script for certbot dns-01 challenge
 
 # install curl
-$(apk --no-cache add curl)
+apk --no-cache add curl
 
 ACME_PREFIX="_acme-challenge"