diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..6b8710a
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1 @@
+.git
diff --git a/.gitignore b/.gitignore
index 378eac2..5576fa6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 build
+install-win32
+packages
diff --git a/.travis.yml b/.travis.yml
index debe3ba..35d2c62 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,21 +1,14 @@
-dist: trusty
-sudo: required
+dist: xenial
+services: docker
+language: bash
 
-language: c
-compiler: gcc
-
-before_install:
-  - sudo apt-get update -y
-  - sudo apt-get install -y gcc-mingw-w64-i686 g++-mingw-w64-i686
-  - sudo bash -c "cd /tmp && wget https://github.com/at-wat/qt/releases/download/v4.8-win32static/qt4.ubuntu-trusty.mingw32.tar.gz && cd / && tar xzf /tmp/qt4.ubuntu-trusty.mingw32.tar.gz"
 script:
-  - mkdir build-win32 && cd build-win32 && /usr/local/mingw32/bin/qmake ../ypspur_gui.pro && make release LFLAGS="-static -mwindows"
-  - cd ../
-  - mkdir install-win32 && mkdir install-win32/bin && cp ./build-win32/release/ypspur-gui.exe ./install-win32/bin/
+  - docker build -t builder .
+  - docker run --rm -v $(pwd)/install-win32:/install-win32 builder cp -r /work/install-win32/bin /install-win32/
 before_deploy:
-  - export GIT_TAG=`git describe --abbrev=0 --tags`
+  - export GIT_TAG=$(git describe --abbrev=0 --tags)
   - mkdir packages
-  - cd install-win32/ && zip -q ../packages/ypspur-gui.win32.$GIT_TAG.zip -r $(ls)
+  - cd install-win32/ && zip -q ../packages/ypspur-gui.win32.${GIT_TAG}.zip -r $(ls)
   - cd ../
 
 deploy:
@@ -24,7 +17,7 @@ deploy:
   api_key:
     secure: "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"
   file:
-    - packages/ypspur-gui.win32.$GIT_TAG.zip
+    - packages/ypspur-gui.win32.${GIT_TAG}.zip
   on:
     tags: true
 
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..5576f8f
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,26 @@
+FROM fedora:latest
+
+RUN dnf install -y \
+    make \
+    mingw64-bzip2-static \
+    mingw64-freetype-static \
+    mingw64-gcc-c++ \
+    mingw64-pcre2-static \
+    mingw64-qt5-qmake \
+    mingw64-qt5-qtbase-devel \
+    mingw64-qt5-qtbase-static \
+    mingw64-qt5-qtbase-static \
+    mingw64-win-iconv-static \
+  && dnf clean all
+
+COPY . /work
+WORKDIR /work
+RUN mkdir -p build-win32 \
+  && mkdir -p install-win32/bin
+RUN cd build-win32 \
+  && mingw64-qmake-qt5 ../ypspur_gui.pro \
+  && make release LFLAGS="-static -mwindows" \
+  && cp ./release/ypspur-gui.exe ../install-win32/bin/ \
+  && make clean
+
+RUN mingw-objdump -p install-win32/bin/ypspur-gui.exe | grep dll
diff --git a/README.md b/README.md
index 8c958ca..34cc60f 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ $ git clone https://github.com/at-wat/ypspur-gui.git
 $ cd ypspur-gui
 $ mkdir build
 $ cd build
-$ qmake-qt4 ../ypspur-gui.pro
+$ qmake ../ypspur-gui.pro
 $ make
 # make install
 ```
diff --git a/main.cpp b/main.cpp
index 5a905a0..0def49c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,11 @@
 #include "ypspur_gui.h"
 #include <QApplication>
 
+#ifdef _WIN32
+#include <QtCore/QtPlugin>
+Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin)
+#endif  // _WIN32
+
 int main(int argc, char* argv[])
 {
   QApplication app(argc, argv);
diff --git a/ypspur_gui.cpp b/ypspur_gui.cpp
index 2ba3131..a9d674e 100644
--- a/ypspur_gui.cpp
+++ b/ypspur_gui.cpp
@@ -219,11 +219,7 @@ void YPSpurGUI::setParamFile(QString fileName)
   settings_.setValue("coordinator/param", param_file_);
 }
 
-#if QT_VERSION >= 0x050000
 void YPSpurGUI::on_portList_currentTextChanged(const QString& arg1)
-#else
-void YPSpurGUI::on_portList_textChanged(const QString& arg1)
-#endif
 {
   if (!arg1.isNull())
   {
diff --git a/ypspur_gui.h b/ypspur_gui.h
index 581c8a1..5e053d4 100644
--- a/ypspur_gui.h
+++ b/ypspur_gui.h
@@ -39,11 +39,7 @@ private slots:
   void coordinatorQuit(int exitCode);
 
   void on_parameterBrowse_clicked();
-#if QT_VERSION >= 0x050000
   void on_portList_currentTextChanged(const QString& arg1);
-#else
-  void on_portList_textChanged(const QString& arg1);
-#endif
   void on_interpreterCommand_returnPressed();
   void on_coordinatorDefaultParam_clicked();
   void on_coordinatorPath_textChanged(const QString& arg1);
diff --git a/ypspur_gui.pro b/ypspur_gui.pro
index 9bc4b84..acfa4b7 100644
--- a/ypspur_gui.pro
+++ b/ypspur_gui.pro
@@ -4,36 +4,37 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+lessThan(QT_MAJOR_VERSION, 5) {
+  error("ypspur-gui requires QT>=5")
+}
 
-greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+QT += core gui widgets
 
 TARGET = ypspur-gui
 TEMPLATE = app
 
-
-SOURCES += main.cpp \
-    ypspur_gui.cpp
-
+SOURCES += \
+  main.cpp \
+  ypspur_gui.cpp
 HEADERS  += \
-    ypspur_gui.h
-
-win32:LIBS += -lsetupapi
-win32:INCLUDEPATH += /mingw/include/ddk
-
-win32:QMAKE_CXXFLAGS_RELEASE -= -O
-win32:QMAKE_CXXFLAGS_RELEASE -= -O1
-win32:QMAKE_CXXFLAGS_RELEASE -= -O2
-
-win32:QMAKE_CXXFLAGS_RELEASE *= -Os
-
-
+  ypspur_gui.h
 FORMS += \
-    ypspur_gui.ui
+  ypspur_gui.ui
+
+win32:QTPLUGIN.platforms = qwindows
+win32:LIBS += \
+  -lsetupapi \
+  -lqwindows \
+  -ldwmapi \
+  -lQt5EventDispatcherSupport \
+  -lQt5FontDatabaseSupport \
+  -lQt5ThemeSupport \
+  -lQt5VulkanSupport \
+  -lQt5WindowsUIAutomationSupport
 
-CONFIG += static
+win32:QMAKE_CXXFLAGS_RELEASE *= -Os
 
+win32:CONFIG += static
 
 INSTALLS += target
 target.path = /usr/local/bin
-