diff --git a/Readme.md b/Readme.md
index a1c55d4..605c584 100644
--- a/Readme.md
+++ b/Readme.md
@@ -17,7 +17,7 @@ The final design relies on an insuflation mask (_with a standard 22m inner diame
 
 The downside of this method are that firstly these mask tend to deteriorate over time and with use as they are ment to be single use item, however they are obviously swapable so they can be switched when unsusable ; and secondly that the height of these mask and the length of the adapter puts the majority of the mask weight far from the face and thus a bit unconfortable, espacially under quick head movments.
 
-For a mask that directly fit on the face, see [the section on older version](#2---Older-version).
+For a mask that directly fit on the face, see [the section on older version](#2-older-version).
 
 ### 1.b - Filtering cartidge
 
@@ -26,7 +26,7 @@ This mask supports standard 40mm threaded cartridges - sometimes also known as "
 We also provide a 3D printed cartridge following this standard and compatible with this mask and other standard gaz mask in the [3D-printed-parametric-respiratory-one-way-valve](https://git.deuxfleurs.fr/distorsion/3D-printed-parametric-40mm-gaz-mask-canister) repository, which is a submodule of this repository located at [./3D-printed-parametric-respiratory-one-way-valve](./).
 **WARNING : _Please don't use a 3D printed cartridge (or even our mask) in life threatening situations !_** Or at least understand the inner working of gaz mask and test your gaz mask (_especialy its fittment to your face_) before using it.
 
-There is also an older version of such a cartridge modeled within the file of the [old gaz mask version](#2.b---_Older-version-:_-Filtering-cartidge).
+There is also an older version of such a cartridge modeled within the file of the [old gaz mask version](#2-b-_older-version-_-filtering-cartidge).
 
 There also exist 3D printed adapter from this standard to other standard gaz mask connector if you search on 3D printing site.