diff --git a/pydetex/_utils_tex.py b/pydetex/_utils_tex.py
index f718c91..8e92406 100644
--- a/pydetex/_utils_tex.py
+++ b/pydetex/_utils_tex.py
@@ -462,8 +462,7 @@ def get_tex_commands_args(
         if len(command) == 0:
             command.append(s[a + 1:b + 1].strip())
         arg = s[c - 1:d + 2]
-        optional = '[' in arg
-        command.append((arg[1:-1], optional))
+        command.append((arg[1:-1], len(arg) != 0 and arg[0] == '['))
         if not cont:
             if pos:
                 command.append((a, d + 2))
diff --git a/pydetex/version.py b/pydetex/version.py
index 3966b71..e80729d 100644
--- a/pydetex/version.py
+++ b/pydetex/version.py
@@ -32,6 +32,6 @@ def __str__(self) -> str:
     patch = property(lambda self: self[2])
 
 
-vernum = Version(1, 0, 6)
+vernum = Version(1, 0, 7)
 ver = str(vernum)
 rev = ''
diff --git a/test/test_utils.py b/test/test_utils.py
index c5f137f..d234572 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -432,6 +432,10 @@ def test_get_tex_commands_args(self) -> None:
         s = 'This is \\subfloat[a title]'
         self.assertEqual(ut.get_tex_commands_args(s), (('subfloat', ('a title', True)),))
         self.assertEqual(ut.get_tex_commands_args(s, True), (('subfloat', ('a title', True), (8, 26)),))
+        s = 'This is \\command{[not_optional]}'
+        self.assertEqual(ut.get_tex_commands_args(s), (('command', ('[not_optional]', False)),))
+        s = 'This is \\command [optional]'
+        self.assertEqual(ut.get_tex_commands_args(s), (('command', ('optional', True)),))
 
     def test_find_tex_commands_no_argv(self) -> None:
         """