diff --git a/chapter_06/parsing.c b/chapter_06/parsing.c
index e14848e..ce1ff56 100644
--- a/chapter_06/parsing.c
+++ b/chapter_06/parsing.c
@@ -42,15 +42,15 @@ int main(int argc, char const *argv[])
     /* Define them with the following language */
     mpca_lang(MPCA_LANG_DEFAULT,
         "                                                        \
-            number   : /-?[0-9]+/ ;                              \
-            operator : '+' | '-' | '*' | '/' ;                   \
+            number   : /-?[0-9]([.][0-9]+)*/ ;                   \
+            operator : '+' | '-' | '*' | '/' | '%' ;             \
             expr     : <number> |  '(' <operator> <expr>+ ')' ;  \
             lispy    : /^/ <operator> <expr>+ /$/ ;              \
         ",
         Number, Operator, Expr, Lispy);
 
     /* Print version and exit information */
-    puts("Lispy version 0.0.0.0.1");
+    puts("Lispy version 0.0.0.0.2");
     puts("Press Ctrl+c to exit\n");
 
     /* In a never ending loop */