diff --git a/.github/workflows/ccpp-linux.yml b/.github/workflows/ccpp-linux.yml
new file mode 100644
index 00000000..39f5f275
--- /dev/null
+++ b/.github/workflows/ccpp-linux.yml
@@ -0,0 +1,46 @@
+name: C/C++ CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+      with:
+        depth: 1
+        submodules: 'recursive'
+    - name: Run Cppcheck
+      uses: Bedzior/run-cppcheck@master
+      with:
+        enabled checks: all
+        enable inconclusive: true
+        generate report: true
+    - name: Upload report
+      uses: actions/upload-artifact@v1
+      with:
+        name: report
+        path: output
+    - name: mkdir
+      run: |
+        mkdir build
+    - name: cmake
+      run: | 
+        cd build
+        cmake ..
+    - name: make -j4
+      run: |
+        cd build
+        make -j4
+    - name: find & copy binaries
+      run: |
+        mkdir artifacts
+        cp --parents build/crypto/fift build/crypto/adjust-block build/crypto/dump-block build/crypto/tlbc build/crypto/func build/crypto/create-state build/validator-engine-console/validator-engine-console build/tonlib/tonlib-cli build/tonlib/libtonlibjson.so.0.5 build/tddb/io-bench build/http/http-proxy build/tdnet/udp_ping_pong build/tdnet/tcp_ping_pong build/rldp-http-proxy/rldp-http-proxy build/dht-server/dht-server build/lite-client/lite-client build/validator-engine/validator-engine build/utils/generate-random-id build/utils/pack-viewer build/utils/json2tlo build/adnl/adnl-proxy build/adnl/adnl-pong artifacts
+    - name: Upload artifacts
+      uses: actions/upload-artifact@master
+      with:
+        name: ton-binaries
+        path: artifacts
diff --git a/.github/workflows/ccpp-win64.yml b/.github/workflows/ccpp-win64.yml
new file mode 100644
index 00000000..4a829a6f
--- /dev/null
+++ b/.github/workflows/ccpp-win64.yml
@@ -0,0 +1,77 @@
+name: C/C++ CI Win64 Compile
+
+on: [push]
+
+defaults:
+  run:
+    shell: cmd
+    
+jobs:
+  build:
+
+    runs-on: windows-latest
+
+    steps:
+      - name: Get Current OS version
+        run: |
+          systeminfo | findstr /B /C:"OS Name" /C:"OS Version"
+
+      - name: Check out current repository
+        uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+        
+      - name: Check out zlib repository
+        uses: actions/checkout@v2
+        with:
+          repository: desktop-app/zlib
+          path: zlib
+          
+      - name: Setup msbuild.exe
+        uses: microsoft/setup-msbuild@v1.0.2
+                
+      - name: Compile zlib Win64
+        run: |
+          cd zlib\contrib\vstudio\vc14
+          msbuild zlibstat.vcxproj /p:Configuration=Debug /p:platform=x64        
+          msbuild zlibstat.vcxproj /p:Configuration=ReleaseWithoutAsm /p:platform=x64
+          
+      - name: Install OpenSSL Win64
+        run: |
+          curl -o openssl.msi https://slproweb.com/download/Win64OpenSSL-1_1_1i.msi
+          msiexec /i openssl.msi /quiet /qn /norestart
+          
+      - name: Build ton
+        run: |
+          set root=%cd%
+          echo %root%
+          mkdir build
+          cd build
+          cmake -DZLIB_FOUND=1 -DZLIB_INCLUDE_DIR=%root%\zlib -DZLIB_LIBRARY=%root%\zlib\contrib\vstudio\vc14\x64\ZlibStatReleaseWithoutAsm\zlibstat.lib -DCMAKE_CXX_FLAGS="/DTD_WINDOWS=1 /EHsc /bigobj /W0" -DCMAKE_BUILD_TYPE=Release ..
+          
+      - name: Compile ton
+        run: |       
+          cd build   
+          cmake --build .
+        continue-on-error: true          
+          
+      - name: Show executables
+        run: |
+          cd build          
+          dir *.exe /a-D /S /B
+          
+      - name: Check if validator-engine.exe exists
+        run: |
+          set root=%cd%
+          copy %root%\build\validator-engine\Debug\validator-engine.exe test
+          
+      - name: Find & copy binaries
+        run: |
+          mkdir artifacts
+          for /f %%a in ('dir *.exe /b /a /s') do copy /Y %%a artifacts
+          
+      - name: Upload artifacts
+        uses: actions/upload-artifact@master
+        with:
+          name: ton-win64-binaries
+          path: artifacts
diff --git a/lite-client/lite-client.cpp b/lite-client/lite-client.cpp
index bf30e1e8..1f438978 100644
--- a/lite-client/lite-client.cpp
+++ b/lite-client/lite-client.cpp
@@ -3461,7 +3461,7 @@ bool TestNode::ValidatorLoadInfo::store_record(const td::Bits256& key, const blo
   if (it == vset_map.end()) {
     return false;
   }
-  created.at(it->second) = std::make_pair<td::int64, td::int64>(mc_cnt.total, shard_cnt.total);
+  created.at(it->second) = std::make_pair(mc_cnt.total, shard_cnt.total);
   return true;
 }
 
diff --git a/tdutils/td/utils/port/Stat.cpp b/tdutils/td/utils/port/Stat.cpp
index abe997c3..00e63438 100644
--- a/tdutils/td/utils/port/Stat.cpp
+++ b/tdutils/td/utils/port/Stat.cpp
@@ -58,6 +58,8 @@
 #define PSAPI_VERSION 1
 #endif
 #include <psapi.h>
+#pragma comment( lib, "psapi.lib" )
+
 
 #endif
 
diff --git a/validator/manager.cpp b/validator/manager.cpp
index d1a3984a..3abea6e8 100644
--- a/validator/manager.cpp
+++ b/validator/manager.cpp
@@ -1692,7 +1692,7 @@ void ValidatorManagerImpl::update_shards() {
   auto exp_vec = last_masterchain_state_->get_shards();
   auto config = last_masterchain_state_->get_consensus_config();
   validatorsession::ValidatorSessionOptions opts{config};
-  uint threshold = 9407194;
+  td::uint32 threshold = 9407194;
   bool force_group_id_upgrade = last_masterchain_seqno_ == threshold;
   auto legacy_opts_hash = opts.get_hash();
   if(last_masterchain_seqno_ >= threshold) { //TODO move to get_consensus_config()