diff --git a/go.mod b/go.mod
index 49a0955..fadd13f 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/chromedp/cdproto v0.0.0-20201204063249-be40c824ad18
 	github.com/chromedp/chromedp v0.5.4
 	github.com/goki/freetype v0.0.0-20181231101311-fa8a33aabaff
-	github.com/hidapple/isbn-gen v1.0.0
+	github.com/hidapple/isbn-gen v1.0.1
 	github.com/satori/go.uuid v1.2.0
 	github.com/schollz/progressbar/v2 v2.15.0
 	github.com/sndnvaps/go-epub v1.0.0
diff --git a/go.sum b/go.sum
index 0fb88c6..cc5f154 100644
--- a/go.sum
+++ b/go.sum
@@ -38,8 +38,8 @@ github.com/goki/freetype v0.0.0-20181231101311-fa8a33aabaff h1:W71vTCKoxtdXgnm1E
 github.com/goki/freetype v0.0.0-20181231101311-fa8a33aabaff/go.mod h1:wfqRWLHRBsRgkp5dmbG56SA0DmVtwrF5N3oPdI8t+Aw=
 github.com/gopherjs/gopherjs v0.0.0-20181103185306-d547d1d9531e h1:JKmoR8x90Iww1ks85zJ1lfDGgIiMDuIptTOhJq+zKyg=
 github.com/gopherjs/gopherjs v0.0.0-20181103185306-d547d1d9531e/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
-github.com/hidapple/isbn-gen v1.0.0 h1:xgWWd3Ftb3QeQbAPxqFx2QPTLbv6VZ1ArOsMHeF8fIE=
-github.com/hidapple/isbn-gen v1.0.0/go.mod h1:h0wwe/MLUq40dTZvtdPph5t4EXnykaQbv+FPcj4wk+I=
+github.com/hidapple/isbn-gen v1.0.1 h1:Hs10fuRAoQmbhvQG20jASprExzPryo9wUUwOeVKTosA=
+github.com/hidapple/isbn-gen v1.0.1/go.mod h1:h0wwe/MLUq40dTZvtdPph5t4EXnykaQbv+FPcj4wk+I=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/jtolds/gls v4.2.1+incompatible h1:fSuqC+Gmlu6l/ZYAoZzx2pyucC8Xza35fpRVWLVmUEE=