diff --git a/restservice/src/main/java/com/plannaplan/controllers/GroupController.java b/restservice/src/main/java/com/plannaplan/controllers/GroupController.java
index 42d2742..3424c95 100755
--- a/restservice/src/main/java/com/plannaplan/controllers/GroupController.java
+++ b/restservice/src/main/java/com/plannaplan/controllers/GroupController.java
@@ -13,9 +13,11 @@ import com.plannaplan.services.GroupService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
@@ -57,4 +59,17 @@ public class GroupController {
         }
         return new ResponseEntity<>(GroupsMappers.mapToGetCourseGroupsDefaultResponse(groups), HttpStatus.OK);
     }
+
+    @PreAuthorize("hasRole('ROLE_DEANERY')")
+    @PutMapping("/{id}/capacity")
+    public ResponseEntity<String> updateCapacity(@PathVariable(name = "id") Long id,
+            @RequestParam(name = "newcapacity") int newcapacity) {
+        final Groups group = this.groupService.getGroupById(id).get();
+        if (group == null) {
+            return new ResponseEntity<>("Given group doens't exist", HttpStatus.NOT_FOUND);
+        }
+        group.setCapacity(newcapacity);
+        this.groupService.save(group);
+        return new ResponseEntity<>("Success", HttpStatus.OK);
+    }
 }
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