diff --git a/.github/workflows/ci-linux.yaml b/.github/workflows/ci-linux.yaml
index c19594b..8079c0a 100644
--- a/.github/workflows/ci-linux.yaml
+++ b/.github/workflows/ci-linux.yaml
@@ -25,7 +25,7 @@ jobs:
             compiler: gcc
             version: "10"
             conan: true
-            cmake-args: -DCMAKE_PREFIX_PATH=`pwd`/build -DCMAKE_MODULE_PATH=`pwd`/build
+            cmake-args: -DCMAKE_PREFIX_PATH=`pwd`/build -DCMAKE_MODULE_PATH=`pwd`/build -DMSGPACK_DEFAULT_API_VERSION=1
 
           - name: ubuntu-20.04-clang-10
             os: ubuntu-20.04
@@ -38,7 +38,7 @@ jobs:
             compiler: clang
             version: "10"
             conan: true
-            cmake-args: -DCMAKE_PREFIX_PATH=`pwd`/build -DCMAKE_MODULE_PATH=`pwd`/build -DAUTOBAHN_USE_LIBCXX=NO
+            cmake-args: -DCMAKE_PREFIX_PATH=`pwd`/build -DCMAKE_MODULE_PATH=`pwd`/build -DAUTOBAHN_USE_LIBCXX=NO -DMSGPACK_DEFAULT_API_VERSION=1
 
     steps:
       - uses: actions/checkout@v2
@@ -58,7 +58,7 @@ jobs:
 
       - name: Install
         run: |
-          python -m pip install cmake==3.22.2 conan==1.44.1 --upgrade
+          python -m pip install cmake==3.22.2 conan>=1.52.0 --upgrade
 
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
           sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-10 main' -y
diff --git a/.github/workflows/ci-windows.yaml b/.github/workflows/ci-windows.yaml
index 16379e7..15fdf61 100644
--- a/.github/workflows/ci-windows.yaml
+++ b/.github/workflows/ci-windows.yaml
@@ -38,7 +38,7 @@ jobs:
 
       - name: Install
         run: |
-          python -m pip install cmake==3.22.2 conan==1.44.1 --upgrade
+          python -m pip install cmake==3.22.2 conan>=1.52.0 --upgrade
           conan profile new default --detect --force
           mkdir -p build && cd build
           conan install .. --build=missing -s arch=${{ matrix.conan_arch }} -s build_type=${{ matrix.type }}
diff --git a/cmake/Includes/CMakeLists.txt b/cmake/Includes/CMakeLists.txt
index 0e9ef28..81cb7ff 100644
--- a/cmake/Includes/CMakeLists.txt
+++ b/cmake/Includes/CMakeLists.txt
@@ -57,6 +57,9 @@ endif()
 find_package(Boost REQUIRED COMPONENTS program_options system thread random)
 
 find_package(msgpack REQUIRED)
+# https://github.com/crossbario/autobahn-cpp/issues/95
+add_compile_definitions(MSGPACK_DEFAULT_API_VERSION=1)
+
 find_package(websocketpp REQUIRED)
 
 MESSAGE( STATUS "AUTOBAHN_BUILD_EXAMPLES:  " ${AUTOBAHN_BUILD_EXAMPLES} )