diff --git a/src/main/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImpl.java b/src/main/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImpl.java
index 31cc9ec..24057e3 100644
--- a/src/main/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImpl.java
+++ b/src/main/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImpl.java
@@ -90,11 +90,12 @@ class GitlabImpl implements Gitlab {
             // get gitlab group info
             var group = teacherGitlabApi.getGroupApi().getGroup(exerciseAssignment.getGitlabGroupId());
 
+            var path = projectName.replaceAll("[^\\w\\-.]", "_");
             // fork the template project
             project = teacherGitlabApi.getProjectApi().forkProject(
                     exerciseAssignment.getGitlabRepositoryTemplateId(),
                     group.getFullPath(),
-                    null,
+                    path,
                     projectName);
             // remove the fork link
             teacherGitlabApi.getProjectApi().deleteForkedFromRelationship(project.getId());
diff --git a/src/test/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImplTest.java b/src/test/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImplTest.java
index bdccb47..3d4452b 100644
--- a/src/test/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImplTest.java
+++ b/src/test/java/fr/univ_lille/gitlab/classrooms/gitlab/GitlabImplTest.java
@@ -170,11 +170,11 @@ class GitlabImplTest {
 
         var projectMock = new Project();
         projectMock.setId(125L);
-        when(gitLabApi.getProjectApi().forkProject("12", null, null, "Exercice 2 - Template-luke.skywalker")).thenReturn(projectMock);
+        when(gitLabApi.getProjectApi().forkProject("12", null, "Exercice_2_-_Template-luke.skywalker", "Exercice 2 - Template-luke.skywalker")).thenReturn(projectMock);
 
         gitlab.createProject(assignment, student);
 
-        verify(gitLabApi.getProjectApi()).forkProject("12", null, null, "Exercice 2 - Template-luke.skywalker");
+        verify(gitLabApi.getProjectApi()).forkProject("12", null, "Exercice_2_-_Template-luke.skywalker", "Exercice 2 - Template-luke.skywalker");
         verify(gitLabApi.getProjectApi()).deleteForkedFromRelationship(125L);
         verify(gitLabApi.getProjectApi()).addMember(125L, 8L, AccessLevel.MAINTAINER);