diff --git a/src/Parser/__init__.py b/src/Parser/__init__.py
index d42e09c..59d2edf 100644
--- a/src/Parser/__init__.py
+++ b/src/Parser/__init__.py
@@ -6,33 +6,33 @@ from collections.abc import Mapping
 __all__ = ["js1_style", "js2_style"]
 
 grammar = """
-        # starting point for jobshop1 input file
+        // starting point for jobshop1 input file
         job_shop1       = skip_preface
-        # eat away lines of preface, until first problem_instance is
-        # encountered; then the list of instances start
+        // eat away lines of preface, until first problem_instance is
+        // encountered; then the list of instances start
         skip_preface    = (!problem_instance r"[^\n]+" skip_preface) / (eol skip_preface) / instance_list
         instance_list   = problem_instance (sep_line trim_ws eol problem_instance eol?)* eof_sep
         problem_instance = trim_ws "instance" ' ' instance_name trim_ws eol trim_ws eol sep_line description eol problem_data
         description     = r"[^\n]*"
         instance_name   = r"\w+"
         sep_line        = trim_ws plus_line trim_ws eol
-        # lines out of multiple + signs
+        // lines out of multiple + signs
         plus_line       = r"\+\+\++"
-        # EOF is a builtin rule matching end of file
+        // EOF is a builtin rule matching end of file
         eof_sep         = trim_ws plus_line " EOF " plus_line trim_ws eol* EOF
-        # entry point for jobshop2 input files
+        // entry point for jobshop2 input files
         job_shop2       = problem_data EOF
         problem_data    = trim_ws num_jobs ' ' num_machines eol job_data+
-        # used for skipping arbitrary number of non-breaking whitespace
+        // used for skipping arbitrary number of non-breaking whitespace
         trim_ws         = r'[ \t]*'
-        # git may change line-endings on windows, so we have to match on both
+        // git may change line-endings on windows, so we have to match on both
         eol             = "\n" / "\r\n"
         nonneg_num      = r'\d+'
         num_jobs        = nonneg_num
         num_machines    = nonneg_num
         machine         = nonneg_num
         duration        = nonneg_num
-        # task data for 1 job
+        // task data for 1 job
         job_data        = ' '* machine ' '+ duration (' '+ machine ' '+ duration)* trim_ws eol
         """