diff --git a/drone/build/build_promote.go b/drone/build/build_promote.go
index 6838562..aee4331 100644
--- a/drone/build/build_promote.go
+++ b/drone/build/build_promote.go
@@ -20,9 +20,10 @@ var buildPromoteCmd = cli.Command{
 			Usage: "custom parameters to be injected into the job environment. Format: KEY=value",
 		},
 		cli.StringFlag{
-			Name:  "format",
-			Usage: "format output",
-			Value: tmplBuildInfo,
+			Name:   "format",
+			Usage:  "format output",
+			Value:  tmplBuildInfo,
+			Hidden: true,
 		},
 	},
 }
diff --git a/drone/build/build_start.go b/drone/build/build_start.go
index 91574d6..f10d06c 100644
--- a/drone/build/build_start.go
+++ b/drone/build/build_start.go
@@ -21,9 +21,10 @@ var buildStartCmd = cli.Command{
 			Usage: "custom parameters to be injected into the job environment. Format: KEY=value",
 		},
 		cli.StringFlag{
-			Name:  "format",
-			Usage: "format output",
-			Value: tmplBuildInfo,
+			Name:   "format",
+			Usage:  "format output",
+			Value:  tmplBuildInfo,
+			Hidden: true,
 		},
 	},
 }