diff --git a/Readme.md b/Readme.md
index e2dcae1..814da89 100644
--- a/Readme.md
+++ b/Readme.md
@@ -40,7 +40,7 @@ This mask can support two separate canisters, which can be advantageous if you n
 We also provide a 3D printed canister following this standard and compatible with this mask and other standard gaz mask in the [distorsion/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: **WARNING : _Please don't use a 3D printed canister (or even our mask) in life threatening situations !_** :warning: 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 canister modeled within the file of the [_old gaz mask version_](#4-b-_older-versiosn-_-filter-canister).
+There is also an older version of such a canister modeled within the file of the [_old gaz mask version_](#4-b-_older-version-_-filter-canister).
 
 There also exist 3D printed adapter from this standard to other standard gaz mask connector if you search on 3D printing site.