diff --git a/docker/al2-dotnet5-opencv4.5.3/Dockerfile b/docker/al2-dotnet5-opencv4.5.3/Dockerfile
index 2f2b0b9c0..6a6c6a227 100644
--- a/docker/al2-dotnet5-opencv4.5.3/Dockerfile
+++ b/docker/al2-dotnet5-opencv4.5.3/Dockerfile
@@ -58,7 +58,7 @@ RUN cd opencv && mkdir build && cd build && \
     -D BUILD_opencv_wechat_qrcode=OFF \
     -D WITH_GSTREAMER=OFF \
     -D OPENCV_ENABLE_NONFREE=ON \
-    .. && make -j8 && make install
+    .. && make -j$(nproc) && make install
 
 # Download OpenCvSharp
 RUN wget https://github.com/shimat/opencvsharp/archive/master.zip && \
diff --git a/docker/ubuntu20-dotnet5-opencv4.5.3/Dockerfile b/docker/ubuntu20-dotnet5-opencv4.5.3/Dockerfile
index 3982cd984..1c0217504 100644
--- a/docker/ubuntu20-dotnet5-opencv4.5.3/Dockerfile
+++ b/docker/ubuntu20-dotnet5-opencv4.5.3/Dockerfile
@@ -82,7 +82,7 @@ RUN cd opencv && mkdir build && cd build && \
     -D BUILD_opencv_structured_light=OFF \
     -D BUILD_opencv_surface_matching=OFF \
     -D BUILD_opencv_videostab=OFF \
-    -D BUILD_opencv_wechat_qrcode=OFF \
+    -D BUILD_opencv_wechat_qrcode=ON \
     -D WITH_GSTREAMER=OFF \
     -D WITH_ADE=OFF \
     -D OPENCV_ENABLE_NONFREE=ON \
@@ -128,14 +128,14 @@ COPY --from=builder /usr/lib /usr/lib
 # Install Build the C# part of OpenCvSharp
 RUN git clone https://github.com/shimat/opencvsharp.git && cd opencvsharp
 RUN cd /opencvsharp/src/OpenCvSharp && \
-    dotnet build -c Release -f netcoreapp3.1 && \
+    dotnet build -c Release -f net5.0 && \
     cd /opencvsharp/src/OpenCvSharp.Extensions && \
-    dotnet build -c Release -f netcoreapp2.1
+    dotnet build -c Release -f net5.0
 
 RUN dotnet test /opencvsharp/test/OpenCvSharp.Tests/OpenCvSharp.Tests.csproj -c Release -f net5.0 --runtime ubuntu.20.04-x64 --logger "trx;LogFileName=test-results.trx" < /dev/null
 
 # Simple console app test using NuGet
-#RUN dotnet new console -f netcoreapp3.1 -o "ConsoleApp01" && cd /ConsoleApp01 && \
+#RUN dotnet new console -f net5.0 -o "ConsoleApp01" && cd /ConsoleApp01 && \
 #    echo "\n\
 #using System; \n\
 #using OpenCvSharp; \n\
diff --git a/docker/ubuntu20-dotnet5sdk-opencv4.5.3/Dockerfile b/docker/ubuntu20-dotnet5sdk-opencv4.5.3/Dockerfile
index 3a40ba4b6..11809e34e 100644
--- a/docker/ubuntu20-dotnet5sdk-opencv4.5.3/Dockerfile
+++ b/docker/ubuntu20-dotnet5sdk-opencv4.5.3/Dockerfile
@@ -128,14 +128,14 @@ COPY --from=builder /usr/lib /usr/lib
 # Install Build the C# part of OpenCvSharp
 RUN git clone https://github.com/shimat/opencvsharp.git && cd opencvsharp
 RUN cd /opencvsharp/src/OpenCvSharp && \
-    dotnet build -c Release -f netcoreapp3.1 && \
+    dotnet build -c Release -f net5.0 && \
     cd /opencvsharp/src/OpenCvSharp.Extensions && \
-    dotnet build -c Release -f netcoreapp2.1
+    dotnet build -c Release -f net5.0
 
 RUN dotnet test /opencvsharp/test/OpenCvSharp.Tests/OpenCvSharp.Tests.csproj -c Release -f net5.0 --runtime ubuntu.20.04-x64 --logger "trx;LogFileName=test-results.trx" < /dev/null
 
 # Simple console app test using NuGet
-#RUN dotnet new console -f netcoreapp3.1 -o "ConsoleApp01" && cd /ConsoleApp01 && \
+# RUN dotnet new console -f net5.0 -o "ConsoleApp01" && cd /ConsoleApp01 && \
 #    echo "\n\
 #using System; \n\
 #using OpenCvSharp; \n\
diff --git a/docker/ubuntu20-dotnet6-opencv4.5.3/Dockerfile b/docker/ubuntu20-dotnet6-opencv4.5.3/Dockerfile
index e349336c2..566f5b484 100644
--- a/docker/ubuntu20-dotnet6-opencv4.5.3/Dockerfile
+++ b/docker/ubuntu20-dotnet6-opencv4.5.3/Dockerfile
@@ -82,7 +82,7 @@ RUN cd opencv && mkdir build && cd build && \
     -D BUILD_opencv_structured_light=OFF \
     -D BUILD_opencv_surface_matching=OFF \
     -D BUILD_opencv_videostab=OFF \
-    -D BUILD_opencv_wechat_qrcode=OFF \
+    -D BUILD_opencv_wechat_qrcode=ON \
     -D WITH_GSTREAMER=OFF \
     -D WITH_ADE=OFF \
     -D OPENCV_ENABLE_NONFREE=ON \
@@ -128,14 +128,14 @@ COPY --from=builder /usr/lib /usr/lib
 # Install Build the C# part of OpenCvSharp
 RUN git clone https://github.com/shimat/opencvsharp.git && cd opencvsharp
 RUN cd /opencvsharp/src/OpenCvSharp && \
-    dotnet build -c Release -f netcoreapp3.1 && \
+    dotnet build -c Release -f net6.0 && \
     cd /opencvsharp/src/OpenCvSharp.Extensions && \
-    dotnet build -c Release -f netcoreapp2.1
+    dotnet build -c Release -f net6.0
 
 RUN dotnet test /opencvsharp/test/OpenCvSharp.Tests/OpenCvSharp.Tests.csproj -c Release -f net6.0 --runtime ubuntu.20.04-x64 --logger "trx;LogFileName=test-results.trx" < /dev/null
 
 # Simple console app test using NuGet
-#RUN dotnet new console -f netcoreapp3.1 -o "ConsoleApp01" && cd /ConsoleApp01 && \
+# RUN dotnet new console -f net6.0 -o "ConsoleApp01" && cd /ConsoleApp01 && \
 #    echo "\n\
 #using System; \n\
 #using OpenCvSharp; \n\
diff --git a/docker/ubuntu20-dotnet6sdk-opencv4.5.3/Dockerfile b/docker/ubuntu20-dotnet6sdk-opencv4.5.3/Dockerfile
index 284e87e3b..6c057eb32 100644
--- a/docker/ubuntu20-dotnet6sdk-opencv4.5.3/Dockerfile
+++ b/docker/ubuntu20-dotnet6sdk-opencv4.5.3/Dockerfile
@@ -82,7 +82,7 @@ RUN cd opencv && mkdir build && cd build && \
     -D BUILD_opencv_structured_light=OFF \
     -D BUILD_opencv_surface_matching=OFF \
     -D BUILD_opencv_videostab=OFF \
-    -D BUILD_opencv_wechat_qrcode=OFF \
+    -D BUILD_opencv_wechat_qrcode=ON \
     -D WITH_GSTREAMER=OFF \
     -D WITH_ADE=OFF \
     -D OPENCV_ENABLE_NONFREE=ON \
@@ -128,27 +128,27 @@ COPY --from=builder /usr/lib /usr/lib
 # Install Build the C# part of OpenCvSharp
 RUN git clone https://github.com/shimat/opencvsharp.git && cd opencvsharp
 RUN cd /opencvsharp/src/OpenCvSharp && \
-    dotnet build -c Release -f netcoreapp3.1 && \
+    dotnet build -c Release -f net6.0 && \
     cd /opencvsharp/src/OpenCvSharp.Extensions && \
-    dotnet build -c Release -f netcoreapp2.1
+    dotnet build -c Release -f net6.0
 
 RUN dotnet test /opencvsharp/test/OpenCvSharp.Tests/OpenCvSharp.Tests.csproj -c Release -f net6.0 --runtime ubuntu.20.04-x64 --logger "trx;LogFileName=test-results.trx" < /dev/null
 
 # Simple console app test using NuGet
-#RUN dotnet new console -f netcoreapp3.1 -o "ConsoleApp01" && cd /ConsoleApp01 && \
-#    echo "\n\
-#using System; \n\
-#using OpenCvSharp; \n\
-#class Program{ \n\
-#  static void Main(){ \n\
-#    Console.WriteLine(Cv2.GetTickCount()); \n\
-#    using var mat = new Mat(1, 1, MatType.CV_8UC1); \n\
-#    Console.WriteLine(mat.CvPtr); \n\
-#  } \n\
-#}" > Program.cs && \
-#    dotnet add package OpenCvSharp4 && \
-#    dotnet run && \
-#    rm -rf /ConsoleApp01
+# RUN dotnet new console -f net6.0 -o "ConsoleApp01" && cd /ConsoleApp01 && \
+#     echo "\n\
+# using System; \n\
+# using OpenCvSharp; \n\
+# class Program{ \n\
+#   static void Main(){ \n\
+#     Console.WriteLine(Cv2.GetTickCount()); \n\
+#     using var mat = new Mat(1, 1, MatType.CV_8UC1); \n\
+#     Console.WriteLine(mat.CvPtr); \n\
+#   } \n\
+# }" > Program.cs && \
+#     dotnet add package OpenCvSharp4 && \
+#     dotnet run && \
+#     rm -rf /ConsoleApp01
 
 #RUN ldd /artifacts/libOpenCvSharpExtern.so