diff --git a/cmd/update_api.go b/cmd/update_api.go
index afb8852..4c3bb06 100644
--- a/cmd/update_api.go
+++ b/cmd/update_api.go
@@ -16,24 +16,38 @@ import (
 	"sigs.k8s.io/yaml"
 )
 
+const updateAPILongHelp = `Command to update the Promise API.
+
+It can be used to update the API GVK, or to add/remove properties to the API.
+
+The --group, --kind, --version, and --plural flags are used to update the API
+GVK. The --property flag is used to add or remove properties from the API. The
+format is PROPERTY-NAME:TYPE. Valid types are string, number, integer, object,
+and boolean.
+
+For object types, the property name can be nested using the '.' character.
+
+To remove a property, append a '-' to the property name.`
+
 var updateAPICmd = &cobra.Command{
 	Use:   "api --property PROPERTY-NAME:TYPE",
 	Short: "Command to update promise API",
-	Long:  "Command to update promise API",
-	Example: `  # add a new property of type string to the API
-  kratix update api --property region:string
+	Long:  updateAPILongHelp,
+	Example: `  # add a new property of type string to the API kratix update api
+	--property region:string
 
   # add an integer 'port' property nested into a 'service' object
   kratix update api --property service.port:integer
-  
+
   # removes the property from the API
   kratix update api --property region-
-  
+
   # updates the API group and the Kind
   kratix update api --group myorg.com --kind Database
-  
+
   # updates the version and the plural form
-  kratix update api --version v1beta3 --plural mydbs`,
+  kratix update api --version v1beta3 --plural mydbs
+  `,
 	RunE: UpdateAPI,
 }
 
@@ -146,7 +160,7 @@ func updateCRDBytes(crd *apiextensionsv1.CustomResourceDefinition) ([]byte, erro
 			propNames := strings.Split(parsedProps[0], ".")
 			propType := parsedProps[1]
 
-			if !slices.Contains([]string{"string", "number", "integer", "object"}, propType) {
+			if !slices.Contains([]string{"string", "number", "integer", "object", "boolean"}, propType) {
 				return nil, fmt.Errorf("unsupported property type: %s", propType)
 			}
 
diff --git a/test/update_test.go b/test/update_test.go
index 84190e8..27e15db 100644
--- a/test/update_test.go
+++ b/test/update_test.go
@@ -46,7 +46,7 @@ var _ = Describe("update", func() {
 		When("called with --help", func() {
 			It("prints the help", func() {
 				session := r.run("update", "api", "--help")
-				Expect(session.Out).To(gbytes.Say("Command to update promise API"))
+				Expect(session.Out).To(gbytes.Say("Command to update the Promise API"))
 			})
 		})