diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b4f33d586..f444966abb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.18.3)
 project (llama CXX)
 
 # llama
-find_package(Boost 1.70.0 REQUIRED)
+find_package(Boost 1.74.0 REQUIRED)
 find_package(fmt CONFIG QUIET)
 add_library(${PROJECT_NAME} INTERFACE)
 target_include_directories(${PROJECT_NAME} INTERFACE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
diff --git a/cmake/llama-config.cmake.in b/cmake/llama-config.cmake.in
index 98c8173cbb..7df2a1947e 100644
--- a/cmake/llama-config.cmake.in
+++ b/cmake/llama-config.cmake.in
@@ -17,7 +17,7 @@ set(llama_INCLUDE_DIR ${llama_INCLUDE_DIR} "${PACKAGE_PREFIX_DIR}/include")
 target_include_directories(llama INTERFACE ${llama_INCLUDE_DIR})
 
 # dependencies
-find_package(Boost 1.70.0 REQUIRED)
+find_package(Boost 1.74.0 REQUIRED)
 find_package(fmt CONFIG QUIET)
 target_link_libraries(llama INTERFACE Boost::headers)
 if (fmt_FOUND)
diff --git a/docs/pages/install.rst b/docs/pages/install.rst
index 86be4b191c..39c9d78fe7 100644
--- a/docs/pages/install.rst
+++ b/docs/pages/install.rst
@@ -25,7 +25,7 @@ LLAMA library
 At its core, using the LLAMA library requires:
 
 - cmake 3.18.3 or higher
-- Boost 1.70.0 or higher
+- Boost 1.74.0 or higher
 - libfmt 6.2.1 or higher (optional) for support to dump mappings as SVG/HTML
 
 Tests
diff --git a/include/llama/Meta.hpp b/include/llama/Meta.hpp
index 0c9ef92633..f52d285535 100644
--- a/include/llama/Meta.hpp
+++ b/include/llama/Meta.hpp
@@ -4,52 +4,6 @@
 
 #include <boost/mp11.hpp>
 
-#if BOOST_MP11_VERSION < 107300
-//  Copyright 2015 Peter Dimov.
-//
-//  Distributed under the Boost Software License, Version 1.0.
-//
-// Boost Software License - Version 1.0 - August 17th, 2003
-//
-// Permission is hereby granted, free of charge, to any person or organization
-// obtaining a copy of the software and accompanying documentation covered by
-// this license (the "Software") to use, reproduce, display, distribute,
-// execute, and transmit the Software, and to prepare derivative works of the
-// Software, and to permit third-parties to whom the Software is furnished to
-// do so, all subject to the following:
-//
-// The copyright notices in the Software and this entire statement, including
-// the above license grant, this restriction and the following disclaimer,
-// must be included in all copies of the Software, in whole or in part, and
-// all derivative works of the Software, unless such copies or derivative
-// works are solely in the form of machine-executable object code generated by
-// a source language processor.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-namespace boost::mp11
-{
-    namespace detail
-    {
-        template<class L2>
-        struct mp_flatten_impl
-        {
-            template<class T>
-            using fn = mp_if<mp_similar<L2, T>, T, mp_list<T>>;
-        };
-    } // namespace detail
-
-    template<class L, class L2 = mp_clear<L>>
-    using mp_flatten = mp_apply<mp_append, mp_push_front<mp_transform_q<detail::mp_flatten_impl<L2>, L>, mp_clear<L>>>;
-} // namespace boost::mp11
-#endif
-
 namespace llama
 {
     // make mp11 directly available in the llama namespace
diff --git a/include/llama/Tuple.hpp b/include/llama/Tuple.hpp
index 5b972b348b..d02de6412d 100644
--- a/include/llama/Tuple.hpp
+++ b/include/llama/Tuple.hpp
@@ -245,10 +245,10 @@ namespace llama
 
     /// Applies a functor to every element of a tuple, creating a new tuple with the result of the element
     /// transformations. The functor needs to implement a template `operator()` to which all tuple elements are passed.
-    // TODO(bgruber): replace by mp11 version in Boost 1.74.
     template<typename... Elements, typename Functor>
     LLAMA_FN_HOST_ACC_INLINE constexpr auto tupleTransform(const Tuple<Elements...>& tuple, const Functor& functor)
     {
+        // note: cannot use mp11::tuple_transform since that returns a std::tuple
         return internal::tupleTransformHelper(std::make_index_sequence<sizeof...(Elements)>{}, tuple, functor);
     }