diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
deleted file mode 100644
index 4505423..0000000
--- a/.github/workflows/build.yaml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: Build
-
-on:
-  push:
-    branches:
-      - master
-
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Install Dependencies
-        run: sudo apt-get install cmake qtbase5-dev libavcodec-dev libavformat-dev libavutil-dev libopencv-dev libopencv-video-dev libopencv-contrib-dev
-
-      - name: Build CMake
-        uses: ashutoshvarma/action-cmake-build@v1
-        with:
-          build-dir: ${{ runner.workspace }}/build
-          build-type: Release
-          # Extra options pass to cmake while configuring project
-          configure-options: -DUSE_WERROR=OFF
-          # install the build using cmake --install
-          install-build: true
-          # run build using '-j [parallel]' to use multiple threads to build
-          parallel: 8
\ No newline at end of file
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b6abb12..ea75ab0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,4 +1,4 @@
-name: CMake
+name: Build on Linux
 
 on:
   push:
@@ -21,7 +21,7 @@ jobs:
     steps:
     - name: Install dependencies
       run: sudo apt-get install cmake qtbase5-dev libavcodec-dev libavformat-dev libavutil-dev libopencv-dev libopencv-video-dev libopencv-contrib-dev
-        
+
     - uses: actions/checkout@v2
 
     - name: Configure CMake
@@ -31,5 +31,5 @@ jobs:
 
     - name: Build
       # Build your program with the given configuration
-      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}} 
-      
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
diff --git a/README.md b/README.md
index f06cd8d..0298fa4 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,10 @@
 
 ## Build Status
 
-Master branch | Development branch
+Linux | Windows
 ------------ | -------------
-[![Linux Status](https://travis-ci.org/pixlra/calyp.svg?branch=master)](https://travis-ci.org/pixlra/calyp.svg?branch=master) [![Windows status](https://ci.appveyor.com/api/projects/status/ea2ktvtg7uqwrika/branch/master?svg=true)](https://ci.appveyor.com/project/jfmcarreira/calyp/branch/master) | Comming soon!
+[Build Action](https://github.com/pixlra/calyp/actions/workflows/build.yml/badge.svg?branch=master) |
+[![Linux Status](https://travis-ci.org/pixlra/calyp.svg?branch=master)](https://travis-ci.org/pixlra/calyp.svg?branch=master) | [![Windows status](https://ci.appveyor.com/api/projects/status/ea2ktvtg7uqwrika/branch/master?svg=true)](https://ci.appveyor.com/project/jfmcarreira/calyp/branch/master)
 
 
 ## Features
diff --git a/lib/CalypDefs.h b/lib/CalypDefs.h
index d5d66d4..b8f6c72 100644
--- a/lib/CalypDefs.h
+++ b/lib/CalypDefs.h
@@ -26,6 +26,7 @@
 #ifndef __CALYPDEFS_H__
 #define __CALYPDEFS_H__
 
+#include <algorithm>
 #include <cstdint>
 #include <iterator>
 #include <memory>
@@ -107,14 +108,14 @@ static const double S_PI_2 = 1.57079632679489661923;
 inline ClpString clpLowercase( const ClpString& in )
 {
   ClpString out;
-  transform( in.begin(), in.end(), std::back_inserter( out ), tolower );
+  std::transform( in.begin(), in.end(), std::back_inserter( out ), tolower );
   return out;
 }
 
 inline ClpString clpUppercase( const ClpString& in )
 {
   ClpString out;
-  transform( in.begin(), in.end(), std::back_inserter( out ), toupper );
+  std::transform( in.begin(), in.end(), std::back_inserter( out ), toupper );
   return out;
 }