diff --git a/Development.md b/Development.md
index 447e039..ebf8d76 100644
--- a/Development.md
+++ b/Development.md
@@ -28,17 +28,17 @@ We try to keep it simple, as such we enforce using following code styles:
 When writing python we follow `PEP-8`, more precisely we are using [black](https://black.readthedocs.io/en/stable/) with a line length of 120 characters.
 
 #### ECMAScript / TypeScript
-We follow the presets of `prettier` version `2.3.0` with this exceptions:
+We follow the presets of `prettier` version `2.4` with this exceptions:
 * You should use single quotes
 * Print semicolons at the ends of statements
-* Line length is 120 characters
+* Line length is 100 characters
 * Allways use parens for arrow functions, e.g. `(x) => fo`
 
 ```json
 "prettier": {
     "singleQuote": true,
     "semi": true,
-    "printWidth": 120,
+    "printWidth": 100,
     "arrowParens": "always"
 }
 ```