diff --git a/.github/workflows/publish_to_pypi.yml b/.github/workflows/publish_to_pypi.yml
index a282bab..bd7b726 100644
--- a/.github/workflows/publish_to_pypi.yml
+++ b/.github/workflows/publish_to_pypi.yml
@@ -17,15 +17,9 @@
 name: Publish to PyPI
 
 on:
-  # push:
-  #   tags:
-  #     - '*'
   push:
-    branches:
-      - master
-  pull_request:
-    branches:
-      - master
+    tags:
+      - '*'
 
 jobs:
   pypi:
@@ -113,12 +107,12 @@ jobs:
           python3 setup.py bdist_wheel --python-tag=py${tag}
           ls -lh dist/
 
-      # - name: Publish wheels to PyPI
-      #   env:
-      #     TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
-      #     TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
-      #   run: |
-      #     twine upload dist/kaldifeat-*.whl
+      - name: Publish wheels to PyPI
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          twine upload dist/kaldifeat-*.whl
 
       - name: Upload Wheel
         uses: actions/upload-artifact@v2
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 18f1284..5fc4918 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -106,7 +106,7 @@ jobs:
           mkdir build_release
           cd build_release
           cmake ..
-          make -j
+          make VERBOSE=1
 
       - name: Run tests
         shell: bash
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8813346..8263966 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
 
 project(kaldifeat)
 
-set(kaldifeat_VERSION "1.3")
+set(kaldifeat_VERSION "1.4")
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
diff --git a/README.md b/README.md
index 408c346..cbc58f3 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,10 @@
 # kaldifeat
 
+<div align="center">
+<img src="/doc/source/images/os.svg">
+</div>
+
+
 <sub>
 <table>
 <tr>
diff --git a/doc/source/images/os.svg b/doc/source/images/os.svg
new file mode 100644
index 0000000..314bf44
--- /dev/null
+++ b/doc/source/images/os.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="118" height="20" role="img" aria-label="OS: Linux | macOS"><title>OS: Linux | macOS</title><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="118" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="27" height="20" fill="#555"/><rect x="27" width="91" height="20" fill="#4c1"/><rect width="118" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="145" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="170">OS</text><text x="145" y="140" transform="scale(.1)" fill="#fff" textLength="170">OS</text><text aria-hidden="true" x="715" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="810">Linux | macOS</text><text x="715" y="140" transform="scale(.1)" fill="#fff" textLength="810">Linux | macOS</text></g></svg>