diff --git a/cmd/cmd.go b/cmd/cmd.go
index ed7fd68..e590fa7 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -30,9 +30,6 @@ type TextBundleToEpub struct {
 }
 
 func (t *TextBundleToEpub) Run(textBundles []string, output string) (err error) {
-	if len(textBundles) == 0 {
-		textBundles, _ = filepath.Glob("*.textbundle")
-	}
 	if len(textBundles) == 0 {
 		return errors.New("no textbundle given")
 	}
diff --git a/go.mod b/go.mod
index cbe3ced..cabf941 100644
--- a/go.mod
+++ b/go.mod
@@ -6,6 +6,6 @@ require (
 	github.com/PuerkitoBio/goquery v1.6.1
 	github.com/gabriel-vasile/mimetype v1.2.0
 	github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8
-	github.com/gonejack/go-epub v1.0.4
+	github.com/gonejack/go-epub v1.0.5
 	github.com/spf13/cobra v1.1.3
 )
diff --git a/go.sum b/go.sum
index db94799..2df25f9 100644
--- a/go.sum
+++ b/go.sum
@@ -63,8 +63,8 @@ github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8 h1:nWU6p08f1VgIalT6iZyqXi4o5cZsz4X6qa87nusfcsc=
 github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8/go.mod h1:aii0r/K0ZnHv7G0KF7xy1v0A7s2Ljrb5byB7MO5p6TU=
-github.com/gonejack/go-epub v1.0.4 h1:ei2i0IO9EsH3TZp/Kh4cREX4FcWfKbGdxlhJWY9yEK4=
-github.com/gonejack/go-epub v1.0.4/go.mod h1:FTk593gdTZ30JUIJUk53c3AMTh63EYaeNbIQUMzIL0o=
+github.com/gonejack/go-epub v1.0.5 h1:Xm1bu/BcDf0iJZT+870a6SHONflEKSIzwNdDGhNb7s0=
+github.com/gonejack/go-epub v1.0.5/go.mod h1:FTk593gdTZ30JUIJUk53c3AMTh63EYaeNbIQUMzIL0o=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
diff --git a/main.go b/main.go
index 74b8649..8248f1e 100644
--- a/main.go
+++ b/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path/filepath"
 
 	_ "embed"
 
@@ -87,6 +88,10 @@ func run(c *cobra.Command, args []string) error {
 		Verbose: verbose,
 	}
 
+	if len(args) == 0 || args[0] == "*.textbundle" {
+		args, _ = filepath.Glob("*.textbundle")
+	}
+
 	return exec.Run(args, *output)
 }