diff --git a/fileutil/file.go b/fileutil/file.go
index d69a2b9b..822d21b2 100644
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -13,8 +13,8 @@ import (
 )
 
 var (
-	shebangRe = regexp.MustCompile(`^#!\s?/(usr/)?bin/(env\s+)?(sh|bash|mksh|bats|zsh)(\s|$)`)
-	extRe     = regexp.MustCompile(`\.(sh|bash|mksh|bats|zsh)$`)
+	shebangRe = regexp.MustCompile(`^#!\s?/(usr/)?bin/(env\s+)?(sh|bash|mksh|bats)(\s|$)`)
+	extRe     = regexp.MustCompile(`\.(sh|bash|mksh|bats)$`)
 )
 
 // TODO: consider removing HasShebang in favor of Shebang in v4