diff --git a/.github/workflows/protobuf.yml b/.github/workflows/protobuf.yml
index 493ee5a74..a7acae918 100644
--- a/.github/workflows/protobuf.yml
+++ b/.github/workflows/protobuf.yml
@@ -32,20 +32,20 @@ jobs:
       id: cache-depends
       uses: actions/cache@v2
       with:
-        path: protobuf-3.15.8
+        path: protobuf-3.20.1
         key: ${{ runner.os }}-v1-depends
 
     - name: Download ProtoBuf
       if: steps.cache-depends.outputs.cache-hit != 'true'
-      run: curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.15.8/protobuf-all-3.15.8.tar.gz && tar xzvf protobuf-all-3.15.8.tar.gz
+      run: curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.20.1/protobuf-all-3.20.1.tar.gz && tar xzvf protobuf-all-3.20.1.tar.gz
 
     - name: Build ProtoBuf
       if: steps.cache-depends.outputs.cache-hit != 'true'
-      working-directory: protobuf-3.15.8
+      working-directory: protobuf-3.20.1
       run: ./configure DIST_LANG=cpp --prefix=/usr && make
 
     - name: Install ProtoBuf
-      working-directory: protobuf-3.15.8
+      working-directory: protobuf-3.20.1
       run: sudo make install && sudo ldconfig
 
     - name: Install proto2cpp
@@ -62,7 +62,7 @@ jobs:
     - name: Prepare Documentation Build
       run: |
         sed -i 's/PROJECT_NUMBER\s*= @VERSION_MAJOR@.@VERSION_MINOR@.@VERSION_PATCH@/PROJECT_NUMBER = master (${{ steps.get_version.outputs.VERSION }})/g' doxygen_config.cmake.in
-        echo "EXCLUDE_PATTERNS = */osi3/* */protobuf-3.15.8/* */proto2cpp/*" >> doxygen_config.cmake.in
+        echo "EXCLUDE_PATTERNS = */osi3/* */protobuf-3.20.1/* */proto2cpp/* */flatbuffers/*" >> doxygen_config.cmake.in
         echo "GENERATE_TREEVIEW = YES" >> doxygen_config.cmake.in
 
     - name: Configure C++ Build
@@ -74,7 +74,7 @@ jobs:
       run: cmake --build . --config Release -j 4
 
     - name: Build Python
-      run: python setup.py build && python setup.py sdist 
+      run: python setup.py build && python setup.py sdist
 
     - name: Install Python
       run: python -m pip install .
@@ -120,20 +120,20 @@ jobs:
       id: cache-depends
       uses: actions/cache@v2
       with:
-        path: protobuf-3.15.8
+        path: protobuf-3.20.1
         key: ${{ runner.os }}-v1-depends
 
     - name: Download ProtoBuf
       if: steps.cache-depends.outputs.cache-hit != 'true'
-      run: curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.15.8/protobuf-all-3.15.8.tar.gz && tar xzvf protobuf-all-3.15.8.tar.gz
+      run: curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.20.1/protobuf-all-3.20.1.tar.gz && tar xzvf protobuf-all-3.20.1.tar.gz
 
     - name: Build ProtoBuf
       if: steps.cache-depends.outputs.cache-hit != 'true'
-      working-directory: protobuf-3.15.8
+      working-directory: protobuf-3.20.1
       run: ./configure DIST_LANG=cpp --prefix=/usr && make
 
     - name: Install ProtoBuf
-      working-directory: protobuf-3.15.8
+      working-directory: protobuf-3.20.1
       run: sudo make install && sudo ldconfig
 
     - name: Prepare C++ Build
@@ -153,7 +153,7 @@ jobs:
       run: cmake --build . --config Release -j 4
 
     - name: Build Python
-      run: python setup.py build && python setup.py sdist 
+      run: python setup.py build && python setup.py sdist
 
     - name: Install Python
       run: python -m pip install .