diff --git a/.github/workflows/develop-pipeline.yml b/.github/workflows/develop-pipeline.yml
index a814acf..b686ddb 100644
--- a/.github/workflows/develop-pipeline.yml
+++ b/.github/workflows/develop-pipeline.yml
@@ -47,13 +47,13 @@ jobs:
       - name: Create JWT keys for staging
         run: |
           mkdir -p back/config/jwt
-          echo "${{ secrets.JWT_PRIVATE_KEY_STG }}" > back/config/jwt/private.pem
-          echo "${{ secrets.JWT_PUBLIC_KEY_STG }}" > back/config/jwt/public.pem
-          chmod 644 back/config/jwt/private.pem
+          printf '%s' "${{ secrets.JWT_PRIVATE_KEY_STG }}" > back/config/jwt/private.pem
+          printf '%s' "${{ secrets.JWT_PUBLIC_KEY_STG }}" > back/config/jwt/public.pem
+          chmod 600 back/config/jwt/private.pem
           chmod 644 back/config/jwt/public.pem
 
       - name: Create .env for frontend staging
-        run: echo "${{ secrets.FRONT_ENV_STG }}" > .env
+        run: printf '%s' "${{ secrets.FRONT_ENV_STG }}" > .env
 
       - name: Build Staging Images
         run: docker compose -f docker-compose-build-stg.yml build
@@ -70,7 +70,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Create .env for backend staging
-        run: echo "${{ secrets.BACK_ENV_STG }}" > .env
+        run: printf '%s' "${{ secrets.BACK_ENV_STG }}" > .env
 
       - name: Deploy Staging Services
         run: |
diff --git a/.github/workflows/main-pipeline.yml b/.github/workflows/main-pipeline.yml
index 9701a0e..d92e32f 100644
--- a/.github/workflows/main-pipeline.yml
+++ b/.github/workflows/main-pipeline.yml
@@ -50,13 +50,13 @@ jobs:
       - name: Create JWT keys for production
         run: |
           mkdir -p back/config/jwt
-          echo "${{ secrets.JWT_PRIVATE_KEY_PRD }}" > back/config/jwt/private.pem
-          echo "${{ secrets.JWT_PUBLIC_KEY_PRD }}" > back/config/jwt/public.pem
-          chmod 644 back/config/jwt/private.pem
+          printf '%s' "${{ secrets.JWT_PRIVATE_KEY_PRD }}" > back/config/jwt/private.pem
+          printf '%s' "${{ secrets.JWT_PUBLIC_KEY_PRD }}" > back/config/jwt/public.pem
+          chmod 600 back/config/jwt/private.pem
           chmod 644 back/config/jwt/public.pem
 
       - name: Create .env for frontend production
-        run: echo "${{ secrets.FRONT_ENV_PRD }}" > .env
+        run: printf '%s' "${{ secrets.FRONT_ENV_PRD }}" > .env
 
       - name: Build Production Images
         run: docker compose -f docker-compose-build-prd.yml build
@@ -72,7 +72,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Create .env for backend production
-        run: echo "${{ secrets.BACK_ENV_PRD }}" > .env
+        run: printf '%s' "${{ secrets.BACK_ENV_PRD }}" > .env
 
       - name: Deploy Production Services
         run: |
diff --git a/README.md b/README.md
index beac8fc..9f8b2be 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # SlotFinder 3
 
-Test number 3
+Test number 4
 
 No more endless discussions to find a date: let us suggest the best times that suit everyone.