diff --git a/api/material.yaml b/api/material.yaml
index c32c1ab..8e3a039 100644
--- a/api/material.yaml
+++ b/api/material.yaml
@@ -40,7 +40,7 @@
       500:
         $ref: 'api.yaml#/components/responses/500'
   put:
-    summary: TODO change material
+    summary: change material
     description: 'Auth: basic, levels: write, maintain, dev, admin'
     tags:
       - /material
@@ -79,8 +79,6 @@
     responses:
       200:
         $ref: 'api.yaml#/components/responses/Ok'
-      400:
-        $ref: 'api.yaml#/components/responses/400'
       401:
         $ref: 'api.yaml#/components/responses/401'
       403:
diff --git a/src/routes/material.spec.ts b/src/routes/material.spec.ts
index bb82bc1..e98da67 100644
--- a/src/routes/material.spec.ts
+++ b/src/routes/material.spec.ts
@@ -130,6 +130,16 @@ describe('/material', () => {
         res: {_id: '100000000000000000000001', name: 'Stanyl TW 200 F8', supplier: 'DSM', group: 'PA46', mineral: 0, glass_fiber: 40, carbon_fiber: 0, numbers: [{color: 'black', number: 5514263423}]}
       });
     });
+    it('returns keeps unchanged properties', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/100000000000000000000001',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200,
+        req: {name: 'Stanyl TW 200 F8', supplier: 'DSM', group: 'PA46', mineral: 0, glass_fiber: 40, carbon_fiber: 0, numbers: [{color: 'black', number: 5514263423}]},
+        res: {_id: '100000000000000000000001', name: 'Stanyl TW 200 F8', supplier: 'DSM', group: 'PA46', mineral: 0, glass_fiber: 40, carbon_fiber: 0, numbers: [{color: 'black', number: 5514263423}]}
+      });
+    });
     it('changes the given properties', done => {
       TestHelper.request(server, done, {
         method: 'put',
@@ -140,9 +150,11 @@ describe('/material', () => {
         ,
       }).end(err => {
         if (err) return done(err);
-        MaterialModel.findById('100000000000000000000001').lean().exec((err, data) => {
+        MaterialModel.findById('100000000000000000000001').lean().exec((err, data:any) => {
           if (err) return done(err);
-          should(data).be.eql({_id: '100000000000000000000002', name: 'UltramidTKR4355G7', supplier: 'BASF', group: 'PA6/6T', mineral: 0, glass_fiber: 35, carbon_fiber: 0, numbers: [{color: 'black', number: 5514212901}, {color: 'signalviolet', number: 5514612901}], __v: 0}
+          data._id = data._id.toString();
+          data.numbers = data.numbers.map(e => {return {color: e.color, number: e.number}});
+          should(data).be.eql({_id: '100000000000000000000001', name: 'UltramidTKR4355G7_2', supplier: 'BASF', group: 'PA6/6T', mineral: '0', glass_fiber: '35', carbon_fiber: '0', numbers: [{color: 'black', number: 5514212901}, {color: 'signalviolet', number: 5514612901}], __v: 0}
           );
           done();
         });
@@ -154,7 +166,7 @@ describe('/material', () => {
         url: '/material/100000000000000000000001',
         auth: {basic: 'janedoe'},
         httpStatus: 400,
-        req: {name: 'UltramidTKR4355G7'},
+        req: {name: 'Ultramid T KR 4355 G7'},
         res: {status: 'Material name already taken'}
       });
     });
@@ -173,9 +185,8 @@ describe('/material', () => {
         method: 'put',
         url: '/material/10000000000000000000000x',
         auth: {basic: 'admin'},
-        httpStatus: 400,
+        httpStatus: 404,
         req: {},
-        res: {status: 'Invalid id'}
       });
     });
     it('rejects an API key', done => {
@@ -227,7 +238,7 @@ describe('/material', () => {
         should(res.body).be.eql({status: 'OK'});
         MaterialModel.findById('100000000000000000000001').lean().exec((err, data) => {
           if (err) return done(err);
-          should(data).have.lengthOf(0);
+          should(data).be.null();
           done();
         });
       });
@@ -238,8 +249,7 @@ describe('/material', () => {
         method: 'delete',
         url: '/material/10000000000000000000000x',
         auth: {basic: 'admin'},
-        httpStatus: 400,
-        res: {status: 'Invalid id'}
+        httpStatus: 404
       });
     });
     it('rejects an API key', done => {
diff --git a/src/routes/material.ts b/src/routes/material.ts
index 42911e3..f193b9f 100644
--- a/src/routes/material.ts
+++ b/src/routes/material.ts
@@ -31,6 +31,58 @@ router.get('/material/' + IdValidate.parameter(), (req, res, next) => {
   });
 });
 
+router.put('/material/' + IdValidate.parameter(), (req, res, next) => {
+  if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
+
+  const {error, value: material} = MaterialValidate.input(req.body, 'change');
+  if(error !== undefined) {
+    res.status(400).json({status: 'Invalid body format'});
+    return;
+  }
+
+  if (material.hasOwnProperty('name')) {
+    MaterialModel.find({name: material.name}).lean().exec((err, data) => {
+      if(err) next(err);
+      if (data.length > 0 && data[0]._id != req.params.id) {
+        res.status(400).json({status: 'Material name already taken'});
+        return;
+      }
+      else {
+        f();
+      }
+    });
+  }
+  else {
+    f();
+  }
+
+  function f() {  // to resolve async
+    MaterialModel.findByIdAndUpdate(req.params.id, material).lean().exec((err, data) => {
+      if (err) next(err);
+      if (data) {
+        res.json(MaterialValidate.output(data));
+      }
+      else {
+        res.status(404).json({status: 'Not found'});
+      }
+    });
+  }
+});
+
+router.delete('/material/' + IdValidate.parameter(), (req, res, next) => {
+  if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
+
+  MaterialModel.findByIdAndDelete(req.params.id).lean().exec((err, data) => {
+    if (err) next(err);
+    if (data) {
+      res.json({status: 'OK'})
+    }
+    else {
+      res.status(404).json({status: 'Not found'});
+    }
+  });
+});
+
 router.post('/material/new', (req, res, next) => {
   if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
 
@@ -52,8 +104,8 @@ router.post('/material/new', (req, res, next) => {
       if(err) next(err);
       res.json(MaterialValidate.output(data.toObject()));
     });
-  })
-})
+  });
+});
 
 
 module.exports = router;
\ No newline at end of file
diff --git a/src/routes/user.ts b/src/routes/user.ts
index aabb8a2..c60dd7b 100644
--- a/src/routes/user.ts
+++ b/src/routes/user.ts
@@ -67,7 +67,7 @@ router.put('/user:username([/](?!key|new).?*|/?)', (req, res, next) => {  // thi
       UserModel.findOneAndUpdate({name: username}, user, {new: true}).lean().exec(  (err, data:any) => {
         if (err) next(err);
         if (data) {
-          res.json(UserValidate.output(data));  // validate all and filter null values from validation errors
+          res.json(UserValidate.output(data));
         }
         else {
           res.status(404).json({status: 'Not found'});
diff --git a/static/styles/swagger.css b/static/styles/swagger.css
index b86a643..ac69d38 100644
--- a/static/styles/swagger.css
+++ b/static/styles/swagger.css
@@ -197,6 +197,10 @@ body:after {
   margin-top: 5px;
 }
 
+.opblock-section .opblock-section-request-body > div > div {
+  padding-top: 18px;
+}
+
 /*response element positions*/
 .swagger-ui .model-example {
   position: relative;