diff --git a/src/version_f.f90 b/src/version_f.f90
index 606727b..b12d489 100644
--- a/src/version_f.f90
+++ b/src/version_f.f90
@@ -8,6 +8,19 @@ module version_f
   public :: version_t, string_t, error_t, is_version, version_range_t, &
             comparator_set_t, comparator_t, operator_index
 
+  type :: string_t
+    character(:), allocatable :: str
+  contains
+    generic :: num => string_t_2i
+    procedure, private :: string_t_2i
+    generic :: is_numeric => string_t_is_numeric
+    procedure, private :: string_t_is_numeric
+  end type
+
+  interface string_t
+    module procedure :: create_string_t
+  end interface
+
   !> Contains all version information.
   type :: version_t
     !> The major version number. Incremented when breaking changes are made.
@@ -57,19 +70,6 @@ module version_f
     module procedure create, parse
   end interface
 
-  type :: string_t
-    character(:), allocatable :: str
-  contains
-    generic :: num => string_t_2i
-    procedure, private :: string_t_2i
-    generic :: is_numeric => string_t_is_numeric
-    procedure, private :: string_t_is_numeric
-  end type
-
-  interface string_t
-    module procedure :: create_string_t
-  end interface
-
   type :: error_t
     character(:), allocatable :: msg
   end type
@@ -78,13 +78,17 @@ module version_f
     module procedure :: create_error_t
   end interface
 
-  type :: version_range_t
-    type(comparator_set_t), allocatable :: comp_sets(:)
+  type :: comparator_t
+    character(:), allocatable :: op
+    type(version_t) :: version
   contains
-    generic :: parse => parse_version_range
-    procedure :: parse_version_range
+    procedure, private :: parse_comp_and_crop_str
   end type
 
+  interface comparator_t
+    module procedure :: create_comp
+  end interface
+
   type :: comparator_set_t
     type(comparator_t), allocatable :: comps(:)
   contains
@@ -96,17 +100,13 @@ module version_f
     module procedure :: create_comp_set
   end interface
 
-  type :: comparator_t
-    character(:), allocatable :: op
-    type(version_t) :: version
+  type :: version_range_t
+    type(comparator_set_t), allocatable :: comp_sets(:)
   contains
-    procedure, private :: parse_comp_and_crop_str
+    generic :: parse => parse_version_range
+    procedure :: parse_version_range
   end type
 
-  interface comparator_t
-    module procedure :: create_comp
-  end interface
-
 contains
 
   !> Wrapper function for `try_create`.