diff --git a/api/types.go b/api/types.go
index 6212286..9d33609 100644
--- a/api/types.go
+++ b/api/types.go
@@ -257,7 +257,7 @@ func IsDefaultNSRecord(record *DomainRecord) bool {
 
 // IsDisallowed prevents empty NS|SOA record lists from being propagated, which is disallowed
 func IsDisallowed(t string, records []*DomainRecord) bool {
-	return len(records) == 0 && strings.EqualFold(t, NSType) || strings.EqualFold(t, SOAType)
+	return len(records) == 0 && strings.EqualFold(t, NSType) || strings.EqualFold(t, SOAType) || strings.EqualFold(t, CAAType)
 }
 
 func isSupportedType(recType string) bool {
diff --git a/install.sh b/install.sh
index d2de0fd..732be14 100755
--- a/install.sh
+++ b/install.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-version=1.7.2
+version=1.7.3
 
 os=$(uname -s | tr '[:upper:]' '[:lower:]')
 mach=$(uname -m)