diff --git a/src/plugins/qmlprojectmanager/buildsystem/projectitem/converters.cpp b/src/plugins/qmlprojectmanager/buildsystem/projectitem/converters.cpp
index 51ee81c7d54..92afbe27e45 100644
--- a/src/plugins/qmlprojectmanager/buildsystem/projectitem/converters.cpp
+++ b/src/plugins/qmlprojectmanager/buildsystem/projectitem/converters.cpp
@@ -530,6 +530,7 @@ QJsonObject qmlProjectTojson(const Utils::FilePath &projectFile)
     QStringList qmlProjectDependencies;
     qmlProjectDependencies.append(qmlprojectsFromImportPaths(importPaths, projectRootPath));
     qmlProjectDependencies.append(qmlprojectsFromFilesNodes(fileGroupsObject, projectRootPath));
+    qmlProjectDependencies.removeDuplicates();
     qmlProjectDependencies.sort();
     rootObject.insert("qmlprojectDependencies", QJsonArray::fromStringList(qmlProjectDependencies));
 
diff --git a/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.cpp b/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.cpp
index 65c310ce497..63380fb5b9d 100644
--- a/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.cpp
+++ b/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.cpp
@@ -238,6 +238,28 @@ QStringList QmlProjectItem::qmlProjectModules() const
     return m_project["qmlprojectDependencies"].toVariant().toStringList();
 }
 
+void QmlProjectItem::setQmlProjectModules(const QStringList &paths)
+{
+    if (qmlProjectModules() == paths)
+        return;
+
+    auto jsonArray = QJsonArray::fromStringList(paths);
+    updateFileGroup("Module", "files", jsonArray);
+    insertAndUpdateProjectFile("qmlprojectDependencies", jsonArray);
+}
+
+void QmlProjectItem::addQmlProjectModule(const QString &modulePath)
+{
+    QJsonArray qmlModules = m_project["qmlprojectDependencies"].toArray();
+
+    if (qmlModules.contains(modulePath))
+        return;
+
+    qmlModules.append(modulePath);
+    updateFileGroup("Module", "files", qmlModules);
+    insertAndUpdateProjectFile("qmlprojectDependencies", qmlModules);
+}
+
 QStringList QmlProjectItem::fileSelectors() const
 {
     return m_project["runConfig"].toObject()["fileSelectors"].toVariant().toStringList();
@@ -444,10 +466,35 @@ void QmlProjectItem::addShaderToolFile(const QString &file)
 void QmlProjectItem::insertAndUpdateProjectFile(const QString &key, const QJsonValue &value)
 {
     m_project[key] = value;
+
     if (!m_skipRewrite)
         m_projectFile.writeFileContents(Converters::jsonToQmlProject(m_project).toUtf8());
 }
 
+void QmlProjectItem::updateFileGroup(const QString &groupType,
+                                     const QString &property,
+                                     const QJsonValue &value)
+{
+    auto arr = m_project["fileGroups"].toArray();
+    auto found = std::find_if(arr.begin(), arr.end(), [groupType](const QJsonValue &elem) {
+        return elem["type"].toString() == groupType;
+    });
+    if (found == arr.end()) {
+        qWarning() << "fileGroups - unable to find group:" << groupType;
+        return;
+    }
+
+    auto obj = found->toObject();
+    obj[property] = value;
+
+    arr.removeAt(std::distance(arr.begin(), found));
+    arr.append(obj);
+    m_project["fileGroups"] = arr;
+
+    m_content.clear();
+    setupFileFilters();
+}
+
 bool QmlProjectItem::enableCMakeGeneration() const
 {
     return m_project["deployment"].toObject()["enableCMakeGeneration"].toBool();
diff --git a/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.h b/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.h
index fa6d700291a..6bfc351edff 100644
--- a/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.h
+++ b/src/plugins/qmlprojectmanager/buildsystem/projectitem/qmlprojectitem.h
@@ -50,6 +50,8 @@ public:
     void setMockImports(const QStringList &paths);
 
     QStringList qmlProjectModules() const;
+    void setQmlProjectModules(const QStringList &paths);
+    void addQmlProjectModule(const QString &modulePath);
 
     QStringList fileSelectors() const;
     void setFileSelectors(const QStringList &selectors);
@@ -121,6 +123,7 @@ private:
 
     // file update functions
     void insertAndUpdateProjectFile(const QString &key, const QJsonValue &value);
+    void updateFileGroup(const QString &groupType, const QString &property, const QJsonValue &value);
 };
 
 } // namespace QmlProjectManager
diff --git a/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.cpp b/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.cpp
index 701da75dd57..509bff6bcf7 100644
--- a/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.cpp
+++ b/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.cpp
@@ -446,6 +446,11 @@ QmlBuildSystem *QmlBuildSystem::getStartupBuildSystem()
     return nullptr;
 }
 
+void QmlBuildSystem::addQmlProjectModule(const Utils::FilePath &path)
+{
+    m_projectItem->addQmlProjectModule(path.toFSPathString());
+}
+
 Utils::FilePath QmlBuildSystem::mainFilePath() const
 {
     const QString fileName = mainFile();
@@ -727,6 +732,11 @@ QStringList QmlBuildSystem::importPaths() const
     return m_projectItem->importPaths();
 }
 
+void QmlBuildSystem::addImportPath(const Utils::FilePath &path)
+{
+    m_projectItem->addImportPath(path.toFSPathString());
+}
+
 QStringList QmlBuildSystem::mockImports() const
 {
     return m_projectItem->mockImports();
diff --git a/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.h b/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.h
index e76d8ba75c9..b2012ec858d 100644
--- a/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.h
+++ b/src/plugins/qmlprojectmanager/buildsystem/qmlbuildsystem.h
@@ -74,12 +74,14 @@ public:
     Utils::EnvironmentItems environment() const;
 
     QStringList allImports() const;
-    QStringList importPaths() const;
     QStringList mockImports() const;
     QStringList absoluteImportPaths() const;
     QStringList targetImportPaths() const;
     QStringList fileSelectors() const;
 
+    QStringList importPaths() const;
+    void addImportPath(const Utils::FilePath &path);
+
     bool multilanguageSupport() const;
     QStringList supportedLanguages() const;
     void setSupportedLanguages(QStringList languages);
@@ -115,6 +117,8 @@ public:
 
     static QmlBuildSystem *getStartupBuildSystem();
 
+    void addQmlProjectModule(const Utils::FilePath &path);
+
 signals:
     void projectChanged();
 
diff --git a/tests/unit/tests/unittests/qmlprojectmanager/projectitem-test.cpp b/tests/unit/tests/unittests/qmlprojectmanager/projectitem-test.cpp
index f3088a56bee..ab12a6e886e 100644
--- a/tests/unit/tests/unittests/qmlprojectmanager/projectitem-test.cpp
+++ b/tests/unit/tests/unittests/qmlprojectmanager/projectitem-test.cpp
@@ -762,6 +762,38 @@ TEST_F(QmlProjectItem, qmlproject_modules)
             "../converter/test-set-mcu-2/testfile.qmlproject"));
 }
 
+TEST_F(QmlProjectItem, set_empty_qmlproject_modules)
+{
+    projectItemSetters->setQmlProjectModules({});
+
+    auto qmlProjectModules = projectItemSetters->qmlProjectModules();
+
+    ASSERT_THAT(qmlProjectModules, IsEmpty());
+}
+
+TEST_F(QmlProjectItem, set_qmlproject_modules)
+{
+    projectItemSetters->setQmlProjectModules({"testModule.qmlproject", "testModule2.qmlproject"});
+
+    auto qmlProjectModules = projectItemSetters->qmlProjectModules();
+
+    ASSERT_THAT(qmlProjectModules,
+                UnorderedElementsAre("testModule.qmlproject", "testModule2.qmlproject"));
+}
+
+TEST_F(QmlProjectItem, add_qmlproject_module)
+{
+    auto currentModules = projectItemSetters->qmlProjectModules();
+    projectItemSetters->addQmlProjectModule("test.qmlproject");
+    projectItemSetters->addQmlProjectModule("test2.qmlproject");
+
+    auto qmlProjectModules = projectItemSetters->qmlProjectModules();
+
+    ASSERT_THAT(qmlProjectModules,
+                UnorderedElementsAreArray(currentModules
+                                          + QStringList{"test.qmlproject", "test2.qmlproject"}));
+}
+
 TEST_F(QmlProjectItem, no_qmlproject_modules)
 {
     auto qmlProjectModules = projectItemEmpty->qmlProjectModules();