diff --git a/README.md b/README.md
index a36ab21..28e5c90 100644
--- a/README.md
+++ b/README.md
@@ -10,12 +10,13 @@ Usage:
   confpress [OPTIONS]
 
 Application Options:
-  -v, --version     Show version
   -d, --debug       Log debug messages
-  -t, --template=   Input template file (- for stdin) (default: -)
-  -o, --output=     Output file (- for stdout) (default: -)
-  -i, --input=      Input variable file(s)
   -e, --env_prefix= Environment variables prefix (default: CONF_)
+  -i, --input=      Input variable file(s)
+  -m, --missing     Allow missing keys
+  -o, --output=     Output file (- for stdout) (default: -)
+  -t, --template=   Input template file (- for stdin) (default: -)
+  -v, --version     Show version
 
 Help Options:
   -h, --help        Show this help message
@@ -24,5 +25,5 @@ Help Options:
 ### Examples
 
 - **Reading a variable from yaml/json as shell env variable:**
-  
+
   `MY_VAR=$(echo "{{ .my_variable }}" | confpress -i variables.yaml)`
diff --git a/confpress.go b/confpress.go
index f639a4b..77abeca 100644
--- a/confpress.go
+++ b/confpress.go
@@ -13,17 +13,16 @@ import (
 )
 
 type Options struct {
-  Version bool `short:"v" long:"version" description:"Show version"`
   Debug bool `short:"d" long:"debug" description:"Log debug messages"`
-  TemplatePath string `short:"t" long:"template" description:"Input template file (- for stdin)" default:"-"`
-  OutputPath string `short:"o" long:"output" description:"Output file (- for stdout)" default:"-"`
-
-  InputPaths []string `short:"i" long:"input" description:"Input variable file(s)"`
-
   EnvPrefix string `short:"e" long:"env_prefix" description:"Environment variables prefix" default:"CONF_"`
+  InputPaths []string `short:"i" long:"input" description:"Input variable file(s)"`
+  Missing bool `short:"m" long:"missing" description:"Allow missing keys"`
+  OutputPath string `short:"o" long:"output" description:"Output file (- for stdout)" default:"-"`
+  TemplatePath string `short:"t" long:"template" description:"Input template file (- for stdin)" default:"-"`
+  Version bool `short:"v" long:"version" description:"Show version"`
 }
 
-const version=`0.0.1`
+const version=`0.1.0`
 var opts Options
 var parser = flags.NewParser(&opts, flags.Default)
 var log = logging.MustGetLogger("default")
@@ -84,8 +83,10 @@ func main() {
     os.Exit(1)
 	}
 
-  // err on missing keys
-  temp.Option("missingkey=error")
+  if ! opts.Missing {
+    // err on missing keys
+    temp.Option("missingkey=error")
+  }
 
   log.Infof("Opening output file: '%s'", opts.OutputPath)
 	outFile, err := createStream(opts.OutputPath)