diff --git a/go.sum b/go.sum
index c33a22331f..048b28c781 100644
--- a/go.sum
+++ b/go.sum
@@ -10,9 +10,8 @@ github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2 h1:JAEbJn3j/FrhdWA9jW8
 github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2/go.mod h1:0KeJpeMD6o+O4hW7qJOT7vyQPKrWmj26uf5wMc/IiIs=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/tdewolff/parse/v2 v2.6.1 h1:RIfy1erADkO90ynJWvty8VIkqqKYRzf2iLp8ObG174I=
-github.com/tdewolff/parse/v2 v2.6.1/go.mod h1:WzaJpRSbwq++EIQHYIRTpbYKNA3gn9it1Ik++q4zyho=
-github.com/tdewolff/test v1.0.6/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=
+github.com/tdewolff/parse/v2 v2.6.2 h1:RDExtQ7ThRGSucatK0nri3p+HD/tSreYh1IDtDDAS/I=
+github.com/tdewolff/parse/v2 v2.6.2/go.mod h1:woz0cgbLwFdtbjJu8PIKxhW05KplTFQkOdX78o+Jgrs=
 github.com/tdewolff/test v1.0.7 h1:8Vs0142DmPFW/bQeHRP3MV19m1gvndjUb1sn8yy74LM=
 github.com/tdewolff/test v1.0.7/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=
 golang.org/x/sys v0.0.0-20220412211240-33da011f77ad h1:ntjMns5wyP/fN65tdBD4g8J5w8n015+iIIs9rtjXkY0=
diff --git a/js/js_test.go b/js/js_test.go
index a37c7a09a4..9b60660485 100644
--- a/js/js_test.go
+++ b/js/js_test.go
@@ -792,6 +792,7 @@ func TestJS(t *testing.T) {
 		{`var a=5;({});var b=function(){3}`, `var b,a=5;({},b=function(){3})`},                                                                             // #494
 		{`var a=5;({});var b=class{c(){3}}`, `var b,a=5;({},b=class{c(){3}})`},                                                                             // #494
 		{`({});a={b(){3}}`, `({},a={b(){3}})`},                                                                                                             // #494
+		{`export default function Foo(){a}Foo.prototype.bar=b`, `export default function Foo(){a}Foo.prototype.bar=b;Foo=6`},                               // #525
 	}
 
 	m := minify.New()