diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bc26d7b0d0a389ca33e876fad6e11ca40c2e33bc..3387b3712629dbbf9845346059729cd8194415f3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,6 +6,6 @@ stages:
 build:
   stage: build
   script:
-    - npm install --global yarn
+    - npm install --force --global yarn
     - yarn install
     - yarn build
diff --git a/README.md b/README.md
index 3c2d0873cf97c840373af105c1564a304fa1d882..4b80faa0933efdba80f508d308683d91443ad033 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,13 @@ yarn run
 ```
 
 ## Useful resources
+[Typescript documentation react](https://www.typescriptlang.org/docs/handbook/react.html)
+
+[MDN](https://developer.mozilla.org/en-US/)
+
+[Documentazione material ui: framework css utilizzato](https://material-ui.com/)
 
-[react calendar app](https://codesandbox.io/s/kkyvoj97pv?from-embed=&file=/src/index.js)
 [codesandbox, utile per vedere altri progetti creati con framework](https://codesandbox.io/)
-[awesome css list](https://github.com/awesome-css-group/awesome-css)
+
+[react calendar app](https://codesandbox.io/s/kkyvoj97pv?from-embed=&file=/src/index.js)
+