diff --git a/zapisy/apps/enrollment/timetable/assets/components/filters/MultiSelectFilter.vue b/zapisy/apps/enrollment/timetable/assets/components/filters/MultiSelectFilter.vue
index cf84939a8e..af338d146b 100644
--- a/zapisy/apps/enrollment/timetable/assets/components/filters/MultiSelectFilter.vue
+++ b/zapisy/apps/enrollment/timetable/assets/components/filters/MultiSelectFilter.vue
@@ -53,6 +53,7 @@ type Methods = {
   clearFilter: () => void;
   clearAll: () => void;
   updateDropdownWidth: () => void;
+  onSearchChange: () => void;
 };
 
 export default defineComponent<Props, any, Data, Computed, Methods>({
@@ -133,6 +134,9 @@ export default defineComponent<Props, any, Data, Computed, Methods>({
         }
       });
     },
+    onSearchChange() {
+      this.$emit("search-change", ...arguments);
+    },
   },
   computed: {
     selectionDescription(): string {
@@ -181,6 +185,7 @@ export default defineComponent<Props, any, Data, Computed, Methods>({
       :track-by="trackBy"
       :label="propAsLabel"
       :placeholder="selectionDescription"
+      @search-change="onSearchChange"
     >
       <template slot="option" slot-scope="props">
         <div class="option-row">
diff --git a/zapisy/apps/theses/assets/components/StudentFilter.vue b/zapisy/apps/theses/assets/components/StudentFilter.vue
index a65e846d44..9de5ec4c14 100644
--- a/zapisy/apps/theses/assets/components/StudentFilter.vue
+++ b/zapisy/apps/theses/assets/components/StudentFilter.vue
@@ -1,5 +1,6 @@
 <script lang="ts">
 import Vue from "vue";
+import { debounce } from "lodash";
 
 import MultiSelectFilter from "@/enrollment/timetable/assets/components/filters/MultiSelectFilter.vue";
 import {
@@ -20,47 +21,113 @@ export default Vue.extend({
       students: [] as MultiselectFilterData<number>,
     };
   },
-  mounted: function () {
-    const djangoField = document.getElementById("id_students");
+  mounted: async function () {
+    const djangoField = document.getElementById(
+      "id_students"
+    ) as HTMLSelectElement | null;
     if (djangoField === null) {
       return;
     }
 
-    const djangoOptions = djangoField.querySelectorAll("option");
-    this.students = Array.from(djangoOptions).map(
-      (option) =>
-        ({
-          value: Number(option.value),
-          label: option.text,
-        } as MultiselectFilterDataItem<number>)
-    );
-
-    const selectedOptions = Array.from(djangoOptions).filter(
-      (option) => option.selected
-    );
-    const multiselectOptions = this.students.filter((dataItem) =>
-      selectedOptions.some(
-        (selectedOption) => Number(selectedOption.value) === dataItem.value
-      )
-    );
+    const options = djangoField.options;
+    if (options.length === 0) {
+      return;
+    }
+    const assigned_students: MultiselectFilterData<number> = Array.from(
+      options
+    ).map((element) => ({
+      value: Number(element.value),
+      label: element.text,
+    }));
+
+    this.students = assigned_students;
 
     const filter = this.$refs["student-filter"] as Vue &
       MultiSelectFilterWithSelected;
     if (filter) {
-      filter.selected = multiselectOptions;
+      filter.selected = this.students;
     }
   },
   methods: {
+    onSelect: function (selectedIds: number[]) {
+      this.updateDjangoField(selectedIds);
+    },
+    clearData: function () {
+      const filter = this.$refs["student-filter"] as Vue &
+        MultiSelectFilterWithSelected;
+      if (filter) {
+        this.students = Array.from(filter.selected);
+      }
+    },
     updateDjangoField: function (selectedIds: number[]) {
-      const djangoField = document.getElementById("id_students");
+      console.log("Selected ids:", selectedIds);
+      const djangoField = document.getElementById(
+        "id_students"
+      ) as HTMLSelectElement | null;
       if (djangoField === null) {
+        console.log("No field");
+        return;
+      }
+
+      const optionArray = Array.from(djangoField.options);
+      const newId = selectedIds.find((id) =>
+        optionArray.every((option) => option.value !== String(id))
+      );
+      const removedIndex = optionArray.findIndex(
+        (option) => !selectedIds.includes(Number(option.value))
+      );
+
+      if (newId !== undefined) {
+        const newOption = document.createElement("option");
+        newOption.value = newId.toString();
+        newOption.text = this.students.find((s) => s.value === newId)!.label;
+        newOption.selected = true;
+        djangoField.options.add(newOption);
+      }
+
+      if (removedIndex !== -1) {
+        djangoField.options.remove(removedIndex);
+      }
+    },
+    fetchStudents: async function (
+      params: Record<string, string>
+    ): Promise<{ students: MultiselectFilterData<number> }> {
+      const ajaxUrlInput = document.querySelector(
+        "input#ajax-url"
+      ) as HTMLInputElement | null;
+
+      if (ajaxUrlInput === null) {
+        throw new Error("#ajax-url not found.");
+      }
+
+      const ajaxUrl = ajaxUrlInput.value;
+      const URLParams = new URLSearchParams(params).toString();
+      const response = await fetch(`${ajaxUrl}?${URLParams}`);
+      return response.json();
+    },
+    onSearchChange: debounce(function (
+      this: { updateStudents: (search: string) => void },
+      search: string
+    ) {
+      return this.updateStudents(search);
+    },
+    300),
+    updateStudents: async function (search: string) {
+      this.clearData();
+
+      if (search.length === 0) {
         return;
       }
 
-      const options = djangoField.querySelectorAll("option");
-      options.forEach((option) => {
-        option.selected = selectedIds.includes(Number(option.value));
+      const { students: fetchedStudents } = await this.fetchStudents({
+        q: search,
       });
+
+      const notSelectedStudents = fetchedStudents.filter((fetchedStudent) =>
+        this.students.every((s) => s.value !== fetchedStudent.value)
+      );
+
+      this.students.push(...notSelectedStudents);
     },
   },
 });
@@ -75,7 +142,8 @@ export default Vue.extend({
       title="Przypisani studenci"
       placeholder="Szukaj po imieniu, nazwisku, numerze indeksu..."
       ref="student-filter"
-      @select="updateDjangoField"
+      @select="onSelect"
+      @search-change="onSearchChange"
     />
   </div>
 </template>
diff --git a/zapisy/apps/theses/forms.py b/zapisy/apps/theses/forms.py
index 95c35aa872..f3ab888a89 100644
--- a/zapisy/apps/theses/forms.py
+++ b/zapisy/apps/theses/forms.py
@@ -2,6 +2,7 @@
 from crispy_forms.layout import Column, Layout, Row, Submit
 from django import forms
 from django.utils import timezone
+from django.db.models import Q
 
 from apps.common import widgets as common_widgets
 from apps.theses.enums import ThesisKind, ThesisStatus, ThesisVote
@@ -43,7 +44,7 @@ class Meta:
                                                 required=False)
     kind = forms.TypedChoiceField(choices=ThesisKind.choices, label="Typ", coerce=int)
     students = forms.ModelMultipleChoiceField(
-        queryset=Student.objects.all(),
+        queryset=Student.objects.none(),
         required=False,
         label="Przypisani studenci",
         widget=forms.SelectMultiple(attrs={'size': '10'}))
@@ -73,6 +74,10 @@ def __init__(self, user, *args, **kwargs):
 
         self.fields['status'].required = False
 
+        if 'students' in self.initial:
+            assigned_ids = [s.id for s in self.initial['students']]
+            self.fields['students'].queryset = Student.objects.filter(Q(id__in=assigned_ids))
+
         self.helper = FormHelper()
         self.helper.form_method = 'POST'
         self.helper.layout = Layout(
@@ -93,6 +98,15 @@ def __init__(self, user, *args, **kwargs):
 
     def clean(self):
         super().clean()
+        if 'students' in self.data:
+            if 'students' in self.errors:
+                self.errors.pop('students')
+            ids_or_students = self.data.getlist('students') if 'getlist' in dir(self.data) else self.data['students']
+            if len(ids_or_students) != 0 and isinstance(ids_or_students[0], str):
+                self.cleaned_data['students'] = Student.objects.filter(Q(id__in=ids_or_students))
+            else:
+                self.cleaned_data['students'] = ids_or_students
+
         students = self.cleaned_data['students']
         max_number_of_students = int(self.cleaned_data['max_number_of_students'])
         if ('students' in self.changed_data or 'max_number_of_students' in self.changed_data) \
diff --git a/zapisy/apps/theses/models.py b/zapisy/apps/theses/models.py
index e9167cdd8a..bc421bfa19 100644
--- a/zapisy/apps/theses/models.py
+++ b/zapisy/apps/theses/models.py
@@ -49,7 +49,7 @@ def visible(self, user):
             (~Q(status=ThesisStatus.BEING_EVALUATED) & ~Q(status=ThesisStatus.RETURNED_FOR_CORRECTIONS)) |
             Q(advisor__user=user) |
             Q(supporting_advisor__user=user) |
-            Q(students__user=user))
+            Q(students__user=user)).distinct()
 
 
 class Thesis(models.Model):
diff --git a/zapisy/apps/theses/templates/theses/thesis_form.html b/zapisy/apps/theses/templates/theses/thesis_form.html
index 5b1a1ce7a8..7314e16a8e 100644
--- a/zapisy/apps/theses/templates/theses/thesis_form.html
+++ b/zapisy/apps/theses/templates/theses/thesis_form.html
@@ -46,6 +46,7 @@ <h1 class="d-inline-block">
         {% csrf_token %}
         {% crispy thesis_form %}
         <div id="student-filter"></div>
+        <input type="hidden" id="ajax-url" value='{% url "theses:students" %}' />
         {% render_bundle 'theses-student-filter' %} 
     </form>
     {% if confirm_changes %}
diff --git a/zapisy/apps/theses/urls.py b/zapisy/apps/theses/urls.py
index bd2f603c9a..8293bb91e9 100644
--- a/zapisy/apps/theses/urls.py
+++ b/zapisy/apps/theses/urls.py
@@ -12,4 +12,5 @@
     path('<int:id>/form/<int:studentid>', views.gen_form, name="gen_form"),
     path('<int:id>/rejecter', views.rejecter_decision, name="rejecter_thesis"),
     path('<int:id>/delete', views.delete_thesis, name="delete_thesis"),
+    path('students', views.students, name="students"),
 ]
diff --git a/zapisy/apps/theses/views.py b/zapisy/apps/theses/views.py
index fb198b4933..0ba930fef9 100644
--- a/zapisy/apps/theses/views.py
+++ b/zapisy/apps/theses/views.py
@@ -1,11 +1,12 @@
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
-from django.http import Http404
+from django.http import Http404, HttpResponseNotAllowed, HttpResponseBadRequest, JsonResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
 from django.views.decorators.http import require_POST
 from django.forms.models import model_to_dict
+from django.db.models import Q
 
 from apps.theses.enums import ThesisStatus, ThesisVote
 from apps.theses.forms import EditThesisForm, RejecterForm, RemarkForm, ThesisForm, VoteForm
@@ -281,3 +282,31 @@ def delete_thesis(request, id):
     thesis.delete()
     messages.success(request, 'Pomyślnie usunięto pracę dyplomową')
     return redirect('theses:main')
+
+
+@employee_required
+def students(request):
+    if request.method != 'GET':
+        return HttpResponseNotAllowed(['GET'])
+
+    if 'q' not in request.GET and 'ids' not in request.GET:
+        return HttpResponseBadRequest()
+
+    if 'q' in request.GET:
+        query = request.GET['q']
+        conditions = (
+            Q(user__first_name__icontains=query) |
+            Q(user__last_name__icontains=query) |
+            Q(matricula__icontains=query)
+        )
+    else:
+        ids = request.GET['ids'].split(',')
+        conditions = Q(id__in=ids)
+
+    matching_students = Student.objects.filter(conditions)
+    return JsonResponse({'students': [
+        {
+            'value': s.id,
+            'label': str(s)
+        } for s in matching_students
+    ]})