diff --git a/grammars/tree-sitter-bash.cson b/grammars/tree-sitter-bash.cson
index 4f74335..a65b19e 100644
--- a/grammars/tree-sitter-bash.cson
+++ b/grammars/tree-sitter-bash.cson
@@ -12,7 +12,7 @@ injectionRegex: '^(bash|sh|BASH|SH)$'
 
 firstLineRegex: [
   # shebang line
-  '^#!.*\\b(bash|sh)\\r?\\n'
+  '^#!.*\\b(bash|sh)(\\r?\\n|\\s)'
 
   # vim modeline
   'vim\\b.*\\bset\\b.*\\b(filetype|ft|syntax)=(sh|bash)'