diff --git a/dev-libs/libmongocrypt/Manifest b/dev-libs/libmongocrypt/Manifest
index 5780b64..6323c87 100644
--- a/dev-libs/libmongocrypt/Manifest
+++ b/dev-libs/libmongocrypt/Manifest
@@ -1 +1 @@
-DIST libmongocrypt-1.15.0.tar.gz 4012071 BLAKE2B 73797bc43f7200508d45f8fb2ccc20dc43fb2952cd42b8f174ff083ba8e2da9831f9b82f9c560dfd30b93731ee7de95eb7023e75af945ab57bfc72ec2bc01744 SHA512 9f83497c5593641369c3741290db99fe3812ca1d8ea40809ac56063a8206ac391def528b08bdc416ff5116341172e9aba4a0315b2f583229dae1aee12a810020
+DIST libmongocrypt-1.15.2.tar.gz 4012840 BLAKE2B 33accfd5ad5b7e565ca58f88c5dcfeabcab9da828c49235d568ce791b6e28dfc9a8728a1f9186648e2f4143b72ce942582e8b2123a1cfb4ddea779a48ecd097c SHA512 26f3feaee715a00d80fea680858b5c2a31cd4e5ea4ce1a3596400fb6ceca5f641cef558324325803e0ca3076b035ddecc7b71d68486a7a7025448172ab4aa30c
diff --git a/dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-cmake4.patch b/dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-cmake4.patch
new file mode 100644
index 0000000..6d846e5
--- /dev/null
+++ b/dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-cmake4.patch
@@ -0,0 +1,120 @@
+ .evergreen/linker_tests_deps/app/CMakeLists.txt |  4 +--
+ CMakeLists.txt                                  | 34 ++++---------------------
+ cmake/MongoC-Warnings.cmake                     |  9 +------
+ kms-message/CMakeLists.txt                      |  5 ++--
+ 4 files changed, 10 insertions(+), 42 deletions(-)
+
+diff --git a/.evergreen/linker_tests_deps/app/CMakeLists.txt b/.evergreen/linker_tests_deps/app/CMakeLists.txt
+index 1a5abb1d..9b9f907e 100644
+--- a/.evergreen/linker_tests_deps/app/CMakeLists.txt
++++ b/.evergreen/linker_tests_deps/app/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required (VERSION 3.5)
++cmake_minimum_required (VERSION 3.15...4.0)
+ project (app C)
+ add_executable (app app.c)
+ find_package (bson-1.0 1.11 REQUIRED)
+@@ -6,4 +6,4 @@ message ("--   libbson found version \"${bson-1.0_VERSION}\"")
+ target_link_libraries (app PRIVATE mongo::bson_static)
+ 
+ find_package (mongocrypt REQUIRED)
+-target_link_libraries (app PRIVATE mongo::mongocrypt)
+\ No newline at end of file
++target_link_libraries (app PRIVATE mongo::mongocrypt)
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index c768faca..69e99f9d 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,15 +1,4 @@
+-cmake_minimum_required (VERSION 3.12)
+-
+-# Preempt the MSVC_RUNTIME_LIBRARY properties
+-if (POLICY CMP0091)
+-   cmake_policy (SET CMP0091 NEW)
+-elseif (DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
+-   message (WARNING "The CMAKE_MSVC_RUNTIME_LIBRARY variable is set, but CMake is too old to understand it")
+-endif ()
+-
+-if (POLICY CMP0135)
+-   cmake_policy (SET CMP0135 NEW)
+-endif ()
++cmake_minimum_required (VERSION 3.15...4.0)
+ 
+ project (mongocrypt C)
+ 
+@@ -27,20 +16,7 @@ option (ENABLE_BUILD_FOR_PPA "Maintainer-only option for preparing PPA build" OF
+ option (ENABLE_ONLINE_TESTS "Enable online tests and the csfle utility. Requires libmongoc." ON)
+ 
+ if (ENABLE_WINDOWS_STATIC_RUNTIME)
+-   if (POLICY CMP0091)
+-      # CMake 3.15 makes this trivial:
+-      set (CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+-   else ()
+-      # Fix it up the old-fashioned way
+-      string (REPLACE "/MDd" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
+-      string (REPLACE "/MD" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
+-      string (REPLACE "/MDd" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+-      string (REPLACE "/MD" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+-      string (APPEND CMAKE_C_FLAGS_DEBUG " /MTd")
+-      string (APPEND CMAKE_CXX_FLAGS_DEBUG " /MTd")
+-      string (APPEND CMAKE_C_FLAGS_RELEASE " /MT")
+-      string (APPEND CMAKE_CXX_FLAGS_RELEASE " /MT")
+-   endif ()
++   set (CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+ endif ()
+ 
+ list (APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
+@@ -216,10 +192,10 @@ if (BUILD_VERSION STREQUAL "0.0.0")
+       file (STRINGS ${PROJECT_SOURCE_DIR}/VERSION_CURRENT BUILD_VERSION)
+       message (STATUS "File VERSION_CURRENT contained BUILD_VERSION ${BUILD_VERSION}")
+    else ()
+-      find_package (PythonInterp)
+-      if (PYTHONINTERP_FOUND)
++      find_package (Python COMPONENTS Interpreter)
++      if (TARGET Python::Interpreter)
+          execute_process (
+-            COMMAND ${PYTHON_EXECUTABLE} etc/calc_release_version.py
++            COMMAND "${Python_EXECUTABLE}" etc/calc_release_version.py
+             WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+             OUTPUT_VARIABLE CALC_RELEASE_VERSION
+             RESULT_VARIABLE CALC_RELEASE_VERSION_RESULT
+diff --git a/cmake/MongoC-Warnings.cmake b/cmake/MongoC-Warnings.cmake
+index 4784c933..eb104f48 100644
+--- a/cmake/MongoC-Warnings.cmake
++++ b/cmake/MongoC-Warnings.cmake
+@@ -42,14 +42,7 @@ function (mongoc_add_platform_compile_options)
+    endforeach ()
+ endfunction ()
+ 
+-if (CMAKE_VERSION VERSION_LESS 3.3)
+-   # On older CMake versions, we'll just always pass the warning options, even
+-   # if the generate warnings for the C++ check file
+-   set (is_c_lang "1")
+-else ()
+-   # $<COMPILE_LANGUAGE> is only valid in CMake 3.3+
+-   set (is_c_lang "$<COMPILE_LANGUAGE:C>")
+-endif ()
++set (is_c_lang "$<COMPILE_LANGUAGE:C>")
+ 
+ # These below warnings should always be unconditional hard errors, as the code is
+ # almost definitely broken
+diff --git a/kms-message/CMakeLists.txt b/kms-message/CMakeLists.txt
+index 6848e61f..ff210d4f 100644
+--- a/kms-message/CMakeLists.txt
++++ b/kms-message/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required (VERSION 3.5)
++cmake_minimum_required (VERSION 3.15...4.0)
+ project (kms_message
+    VERSION 0.0.1
+    LANGUAGES C
+@@ -7,8 +7,7 @@ project (kms_message
+ set (CMAKE_C_STANDARD 99)
+ 
+ include (CheckCCompilerFlag)
+-# All targets obey visibility, not just library targets.
+-cmake_policy (SET CMP0063 NEW)
++
+ set (CMAKE_C_VISIBILITY_PRESET hidden)
+ set (KMS_MESSAGE_SOURCES
+    src/kms_b64.c
diff --git a/dev-libs/libmongocrypt/files/libmongocrypt-1.11.0-static.patch b/dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-static.patch
similarity index 61%
rename from dev-libs/libmongocrypt/files/libmongocrypt-1.11.0-static.patch
rename to dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-static.patch
index aef3eb8..2c9154e 100644
--- a/dev-libs/libmongocrypt/files/libmongocrypt-1.11.0-static.patch
+++ b/dev-libs/libmongocrypt/files/libmongocrypt-1.15.2-static.patch
@@ -1,49 +1,19 @@
 https://github.com/mongodb/libmongocrypt/pull/681
-From d6225c9b68cc6d0bc3ab5e3d3c3ac6e746d564a1 Mon Sep 17 00:00:00 2001
-From: tharvik <tharvik@users.noreply.github.com>
-Date: Sat, 29 Jul 2023 18:38:29 +0200
-Subject: [PATCH 1/4] cmake/bson: enforce local build for test
-
----
- cmake/ImportBSON.cmake | 5 ++++-
- 1 file changed, 4 insertions(+), 1 deletion(-)
+ cmake/ImportBSON.cmake | 95 +++++++++++++++++++++++++++++---------------------
+ 1 file changed, 55 insertions(+), 40 deletions(-)
 
 diff --git a/cmake/ImportBSON.cmake b/cmake/ImportBSON.cmake
-index b33750142..f168681ff 100644
+index c2ca766f..db31c713 100644
 --- a/cmake/ImportBSON.cmake
 +++ b/cmake/ImportBSON.cmake
-@@ -105,9 +105,12 @@ if (NOT DEFINED MONGOCRYPT_MONGOC_DIR)
+@@ -105,27 +105,42 @@ if (NOT DEFINED MONGOCRYPT_MONGOC_DIR)
     include (FetchMongoC)
     # The FetchMongoC module defines a MONGOCRYPT_MONGOC_DIR for us to use
  endif ()
 +if (ENABLE_ONLINE_TESTS AND (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" OR USE_SHARED_LIBBSON))
 +   message (FATAL_ERROR "Online tests requires static local build of libbson")
 +endif ()
- 
- function (_import_bson)
--   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" AND USE_SHARED_LIBBSON AND NOT ENABLE_ONLINE_TESTS)
-+   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" AND USE_SHARED_LIBBSON)
-       message (STATUS "NOTE: Using system-wide libbson library. This is intended only for package maintainers.")
-       find_library (_MONGOCRYPT_SYSTEM_LIBBSON_SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
-       find_library (_MONGOCRYPT_SYSTEM_LIBBSON_STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
-
-From 41b1fd383f61182c42bbaa76705f730a33e7ede2 Mon Sep 17 00:00:00 2001
-From: tharvik <tharvik@users.noreply.github.com>
-Date: Sat, 29 Jul 2023 19:16:53 +0200
-Subject: [PATCH 2/4] cmake/bson: refact system import
-
----
- cmake/ImportBSON.cmake | 43 +++++++++++++++++++++++++-----------------
- 1 file changed, 26 insertions(+), 17 deletions(-)
-
-diff --git a/cmake/ImportBSON.cmake b/cmake/ImportBSON.cmake
-index f168681ff..18e5d58fc 100644
---- a/cmake/ImportBSON.cmake
-+++ b/cmake/ImportBSON.cmake
-@@ -109,26 +109,35 @@ if (ENABLE_ONLINE_TESTS AND (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" OR USE_
-    message (FATAL_ERROR "Online tests requires static local build of libbson")
- endif ()
- 
++
 +function (_import_system_libbson target library_type library_name)
 +   # import a system libbson
 +   # target: target to add library under
@@ -67,9 +37,10 @@ index f168681ff..18e5d58fc 100644
 +   )
 +   set_property (CACHE ${lib} _MONGOCRYPT_SYSTEM_LIBBSON_INCLUDE_DIR PROPERTY ADVANCED TRUE)
 +endfunction ()
-+
+ 
  function (_import_bson)
-    if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" AND USE_SHARED_LIBBSON)
+-   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" AND USE_SHARED_LIBBSON AND NOT ENABLE_ONLINE_TESTS)
++   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM")
        message (STATUS "NOTE: Using system-wide libbson library. This is intended only for package maintainers.")
 -      find_library (_MONGOCRYPT_SYSTEM_LIBBSON_SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
 -      find_library (_MONGOCRYPT_SYSTEM_LIBBSON_STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
@@ -88,28 +59,17 @@ index f168681ff..18e5d58fc 100644
 -         PROPERTY ADVANCED
 -         TRUE
 -      )
-+      _import_system_libbson(bson_shared SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
-+      _import_system_libbson(bson_static STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
++      if (USE_SHARED_LIBBSON)
++         _import_system_libbson (bson_shared SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
++      else ()
++         _import_system_libbson (bson_static STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
++      endif ()
     else ()
        message (STATUS "Using [${MONGOCRYPT_MONGOC_DIR}] as a sub-project for libbson")
        # Disable AWS_AUTH, to prevent it from building the kms-message symbols, which we build ourselves
-
-From 1b7ba197aabb35384e3eb80476e0f4584cce2c71 Mon Sep 17 00:00:00 2001
-From: tharvik <tharvik@users.noreply.github.com>
-Date: Sat, 29 Jul 2023 20:09:10 +0200
-Subject: [PATCH 3/4] cmake/bson: install static iff not system
-
----
- cmake/ImportBSON.cmake | 40 ++++++++++++++++++++--------------------
- 1 file changed, 20 insertions(+), 20 deletions(-)
-
-diff --git a/cmake/ImportBSON.cmake b/cmake/ImportBSON.cmake
-index 18e5d58fc..afc784826 100644
---- a/cmake/ImportBSON.cmake
-+++ b/cmake/ImportBSON.cmake
-@@ -161,6 +161,26 @@ function (_import_bson)
-       else ()
-          add_subdirectory ("${MONGOCRYPT_MONGOC_DIR}" _mongo-c-driver EXCLUDE_FROM_ALL)
+@@ -172,6 +187,26 @@ function (_import_bson)
+       if (DEFINED saved_build_version)
+          set (BUILD_VERSION "${saved_build_version}")
        endif ()
 +
 +      # Put the libbson dynamic library into the current binary directory (plus possible config suffix).
@@ -134,7 +94,19 @@ index 18e5d58fc..afc784826 100644
        if (TARGET mongoc_static)
           # Workaround: Embedded mongoc_static does not set its INCLUDE_DIRECTORIES for user targets
           target_include_directories (mongoc_static
-@@ -201,23 +221,3 @@ if (TARGET mongoc_static)
+@@ -202,33 +237,13 @@ install (
+ # users during find_package()
+ if (USE_SHARED_LIBBSON)
+    target_link_libraries (_mongocrypt-libbson_for_shared INTERFACE $<BUILD_INTERFACE:bson_shared>)
++   target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_shared>)
+ else ()
+    target_link_libraries (_mongocrypt-libbson_for_shared INTERFACE $<BUILD_INTERFACE:bson_static>)
++   target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_static>)
+ endif ()
+-# libbson_for_static always links to the static libbson:
+-target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_static>)
+ 
+ if (TARGET mongoc_static)
     # And an alias to the mongoc target for use in some test cases
     add_library (_mongocrypt::mongoc ALIAS mongoc_static)
  endif ()
@@ -158,48 +130,3 @@ index 18e5d58fc..afc784826 100644
 -      RENAME ${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-for-libmongocrypt${CMAKE_STATIC_LIBRARY_SUFFIX}
 -      )
 -endif ()
-
-From 70c6d9cfbfa7608428391b6d796337d5e8abde14 Mon Sep 17 00:00:00 2001
-From: tharvik <tharvik@users.noreply.github.com>
-Date: Sat, 29 Jul 2023 23:05:26 +0200
-Subject: [PATCH 4/4] cmake/bson: only load needed system lib
-
----
- cmake/ImportBSON.cmake | 13 ++++++++-----
- 1 file changed, 8 insertions(+), 5 deletions(-)
-
-diff --git a/cmake/ImportBSON.cmake b/cmake/ImportBSON.cmake
-index afc784826..672034082 100644
---- a/cmake/ImportBSON.cmake
-+++ b/cmake/ImportBSON.cmake
-@@ -134,10 +134,13 @@ function (_import_system_libbson target library_type library_name)
- endfunction ()
- 
- function (_import_bson)
--   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM" AND USE_SHARED_LIBBSON)
-+   if (MONGOCRYPT_MONGOC_DIR STREQUAL "USE-SYSTEM")
-       message (STATUS "NOTE: Using system-wide libbson library. This is intended only for package maintainers.")
--      _import_system_libbson(bson_shared SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
--      _import_system_libbson(bson_static STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
-+      if (USE_SHARED_LIBBSON)
-+         _import_system_libbson (bson_shared SHARED "${CMAKE_SHARED_LIBRARY_PREFIX}bson-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}")
-+      else ()
-+         _import_system_libbson (bson_static STATIC "${CMAKE_STATIC_LIBRARY_PREFIX}bson-static-1.0${CMAKE_STATIC_LIBRARY_SUFFIX}")
-+      endif ()
-    else ()
-       message (STATUS "Using [${MONGOCRYPT_MONGOC_DIR}] as a sub-project for libbson")
-       # Disable AWS_AUTH, to prevent it from building the kms-message symbols, which we build ourselves
-@@ -211,11 +214,11 @@ install (
- # users during find_package()
- if (USE_SHARED_LIBBSON)
-    target_link_libraries (_mongocrypt-libbson_for_shared INTERFACE $<BUILD_INTERFACE:bson_shared>)
-+   target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_shared>)
- else ()
-    target_link_libraries (_mongocrypt-libbson_for_shared INTERFACE $<BUILD_INTERFACE:bson_static>)
-+   target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_static>)
- endif ()
--# libbson_for_static always links to the static libbson:
--target_link_libraries (_mongocrypt-libbson_for_static INTERFACE $<BUILD_INTERFACE:bson_static>)
- 
- if (TARGET mongoc_static)
-    # And an alias to the mongoc target for use in some test cases
diff --git a/dev-libs/libmongocrypt/libmongocrypt-1.15.0.ebuild b/dev-libs/libmongocrypt/libmongocrypt-1.15.2.ebuild
similarity index 92%
rename from dev-libs/libmongocrypt/libmongocrypt-1.15.0.ebuild
rename to dev-libs/libmongocrypt/libmongocrypt-1.15.2.ebuild
index 56e7c17..4142f58 100644
--- a/dev-libs/libmongocrypt/libmongocrypt-1.15.0.ebuild
+++ b/dev-libs/libmongocrypt/libmongocrypt-1.15.2.ebuild
@@ -25,7 +25,8 @@ DEPEND="${RDEPEND}
 	)"
 
 PATCHES=(
-	"${FILESDIR}/${PN}-1.11.0-static.patch"
+	"${FILESDIR}/${PN}-1.15.2-static.patch"
+	"${FILESDIR}/${PN}-1.15.2-cmake4.patch"
 )
 
 src_configure() {