diff --git a/CMakeLists.txt b/CMakeLists.txt
index b6cb0b2b..76f33d62 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.15)
 
-set(libcmaes_VERSION 0.10.2)
+set(libcmaes_VERSION 0.10.3)
 
 project (libcmaes
   VERSION ${libcmaes_VERSION}
@@ -28,6 +28,7 @@ option (LIBCMAES_BUILD_TESTS "build tests" OFF)
 option (LIBCMAES_BUILD_EXAMPLES "build examples" ${LIBCMAES_TOP_LEVEL})
 option (LIBCMAES_USE_OPENMP "Use OpenMP for multithreading" ON)
 option (LIBCMAES_ENABLE_SURROG "support for surrogates" ON)
+option (LIBCMAES_EIGEN_5 "Use Eigen v5" OFF)
 
 # Offer the user the choice of overriding the installation directories
 set (INSTALL_LIB_DIR lib${LIB_SUFFIX}
@@ -78,8 +79,9 @@ if(LIBCMAES_BUILD_PYTHON)
   endif ()
 endif()
 
-
-find_package (Eigen3 3.4.0 REQUIRED)
+if (NOT LIBCMAES_EIGEN_5)
+  find_package (Eigen3 3.4.0 REQUIRED)
+endif()
 
 if (LIBCMAES_USE_OPENMP)
   find_package (OpenMP QUIET)
diff --git a/appveyor.yml b/appveyor.yml
index 0fdd1cf8..f43c59be 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,14 +2,34 @@ clone_folder: C:\projects\libcmaes
 environment:
   matrix:
     - CMAKE_PLATFORM: "Visual Studio 14 2015"
+      EIGEN_VERSION: "3.3.4"
+      EIGEN_URL: "https://bitbucket.org/eigen/eigen/get/3.3.4.tar.gz"
+      EIGEN_ZIP: "3.3.4.tar.gz"
+      LIBCMAES_EIGEN_5: OFF
+    - CMAKE_PLATFORM: "Visual Studio 14 2015"
+      EIGEN_VERSION: "5.0.0"
+      EIGEN_URL: "https://gitlab.com/libeigen/eigen/-/archive/5.0.0/eigen-5.0.0.tar.gz"
+      EIGEN_ZIP: "eigen-5.0.0.tar.gz"
+      LIBCMAES_EIGEN_5: ON
+    - CMAKE_PLATFORM: "Visual Studio 14 2015 Win64"
+      EIGEN_VERSION: "3.3.4"
+      EIGEN_URL: "https://bitbucket.org/eigen/eigen/get/3.3.4.tar.gz"
+      EIGEN_ZIP: "3.3.4.tar.gz"
+      LIBCMAES_EIGEN_5: OFF
     - CMAKE_PLATFORM: "Visual Studio 14 2015 Win64"
+      EIGEN_VERSION: "5.0.0"
+      EIGEN_URL: "https://gitlab.com/libeigen/eigen/-/archive/5.0.0/eigen-5.0.0.tar.gz"
+      EIGEN_ZIP: "eigen-5.0.0.tar.gz"
+      LIBCMAES_EIGEN_5: ON
 
 install:
   - cinstall: python
-  - appveyor-retry appveyor DownloadFile https://bitbucket.org/eigen/eigen/get/3.3.4.tar.gz
-  - 7z x 3.3.4.tar.gz -oc:\projects > nul
-  - 7z x c:\projects\3.3.4.tar -oc:\projects > nul
-  - cd c:\projects\eigen-eigen-5a0156e40feb
+  - appveyor-retry appveyor DownloadFile "%EIGEN_URL%" -FileName eigen.tar.gz
+  - 7z x eigen.tar.gz -oc:\projects > nul
+  - 7z x c:\projects\eigen.tar -oc:\projects > nul
+  - cd c:\projects
+  - for /d %%i in (eigen-*) do set EIGEN_DIR=%%i
+  - cd %EIGEN_DIR%
   - mkdir build && cd build
   - cmake -G "%CMAKE_PLATFORM%" -DCMAKE_INSTALL_PREFIX=c:\Libraries\eigen -DCMAKE_BUILD_TYPE=Release ..
   - cmake --build . --config Release --target install
@@ -17,6 +37,6 @@ install:
 build_script:
   - cd c:\projects\libcmaes
   - mkdir build && cd build
-  - cmake -G "%CMAKE_PLATFORM%" -DCMAKE_INSTALL_PREFIX=c:\Libraries\libcmaes -DEigen3_DIR=c:\Libraries\eigen\share\eigen3\cmake -DBOOST_ROOT="C:/Libraries/boost_1_63_0" ..
+  - cmake -G "%CMAKE_PLATFORM%" -DCMAKE_INSTALL_PREFIX=c:\Libraries\libcmaes -DLIBCMAES_EIGEN_5=%LIBCMAES_EIGEN_5% -DEigen3_DIR=c:\Libraries\eigen\share\eigen3\cmake -DBOOST_ROOT="C:/Libraries/boost_1_63_0" ..
   - cmake --build . --config Release --target install
   - ctest -C Release
diff --git a/conanfile.py b/conanfile.py
index 9d12ffac..6089a88c 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -23,11 +23,14 @@ class CmaesConan(ConanFile):
 
     # Binary configuration
     settings = "os", "compiler", "build_type", "arch"
+
+    generators = "cmake"
     options = {
         "shared": [True, False],
         "openmp": [True, False],
         "surrog": [True, False],
         "enable_tests": [True, False],
+        "eigen_5": [True, False],
     }
     default_options = {
         "shared": True,
@@ -35,6 +38,7 @@ class CmaesConan(ConanFile):
         "surrog": True,
         "enable_tests": False,
         "boost/*:without_python": False,
+        "eigen_5": False,
     }
 
     # Sources are located in the same place as this recipe, copy them to the recipe
@@ -55,8 +59,10 @@ def build_requirements(self):
             self.test_requires("boost/1.85.0")
 
     def requirements(self):
-        self.requires("eigen/3.4.0", transitive_headers=True)
-
+        if self.options.eigen_5:
+            self.requires("eigen/5.0.0")
+        else:
+            self.requires("eigen/3.4.0", transitive_headers=True)
         if self.options.openmp and self.settings.os != "Windows":
             self.requires("llvm-openmp/17.0.6", transitive_headers=True)
 
@@ -94,6 +100,7 @@ def generate(self):
         tc.variables["LIBCMAES_ENABLE_SURROG"] = self.options.surrog
         tc.variables["LIBCMAES_BUILD_PYTHON"] = self.options.enable_tests
         tc.variables["LIBCMAES_BUILD_TESTS"] = self.options.enable_tests
+        tc.variables["LIBCMAES_EIGEN_5"] = self.options.eigen_5
         tc.generate()
 
     def build(self):
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 397bb461..f97e1ab7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -56,7 +56,16 @@ target_include_directories (
   cmaes PUBLIC $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
                $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
   )
-target_link_libraries (cmaes PUBLIC Eigen3::Eigen)
+
+if (LIBCMAES_EIGEN_5)
+  include (${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+  conan_basic_setup(TARGETS)
+
+  target_link_libraries (cmaes PUBLIC CONAN_PKG::eigen)
+else ()
+  target_link_libraries (cmaes PUBLIC Eigen3::Eigen)
+endif ()
+
 if (LIBCMAES_USE_OPENMP)
   target_link_libraries (cmaes PUBLIC OpenMP::OpenMP_CXX)
 endif ()