diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2109fb99..20de2e38 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,6 +9,11 @@ on:
 jobs:
   backend:
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18]
+
     steps:
       - name: Checkout Code
         uses: actions/checkout@v4
@@ -59,4 +64,4 @@ jobs:
 
       - name: Build Frontend
         working-directory: frontend
-        run: npm run build
\ No newline at end of file
+        run: npm run build
diff --git a/backend/src/models/Routine.js b/backend/src/models/Routine.js
index b9029425..b87b178d 100644
--- a/backend/src/models/Routine.js
+++ b/backend/src/models/Routine.js
@@ -10,6 +10,7 @@ const routineSchema = mongoose.Schema(
     name: {
       type: String,
       required: true,
+      trim: true
     },
     description: {
       type: String,
@@ -25,6 +26,7 @@ const routineSchema = mongoose.Schema(
         day: {
           type: String,
           required: true,
+          trim: true,
           enum: [
             "Monday",
             "Tuesday",
diff --git a/backend/src/models/Task.js b/backend/src/models/Task.js
index afcc9bd5..41ad178d 100644
--- a/backend/src/models/Task.js
+++ b/backend/src/models/Task.js
@@ -10,14 +10,17 @@ const taskSchema = mongoose.Schema(
     title: {
       type: String,
       required: true,
+      trim: true
     },
     description: {
       type: String,
       required: false,
+      trim: true
     },
     tags: {
       type: [String],
       required: false,
+      trim: true
       default: [],
     },
     priority: {
diff --git a/backend/src/models/User.js b/backend/src/models/User.js
index 993693e2..7c92201d 100644
--- a/backend/src/models/User.js
+++ b/backend/src/models/User.js
@@ -46,4 +46,4 @@ const userSchema = new mongoose.Schema(
 
 const User = mongoose.model('User', userSchema);
 
-export default User;
\ No newline at end of file
+export default User;