diff --git a/ports/mimalloc/portfile.cmake b/ports/mimalloc/portfile.cmake
index 009ee76333..0a2bade58b 100644
--- a/ports/mimalloc/portfile.cmake
+++ b/ports/mimalloc/portfile.cmake
@@ -2,8 +2,8 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO microsoft/mimalloc
     REF "v${VERSION}"
-    SHA512 19f5481c98822c6a279e2f2d26d6c54918e18bcafd515a76ca3a3845f3a5e599236ea042f9cadaf793dce0c1ede347d76cc2fc5503094288362a78034d4d8f71
-    HEAD_REF master
+    SHA512 176fbfd6ef3698841f8a53fb968a1198e08eef071f3d5a811046521c9bac5c3e36d024c8b1fb67e95f9018658083efd98222502e81d57e114ebb76af13008fec
+    HEAD_REF dev3
     PATCHES
         pkgconfig-cxx.diff
 )
diff --git a/ports/mimalloc/vcpkg.json b/ports/mimalloc/vcpkg.json
index c9b7d96e5e..245f913f14 100644
--- a/ports/mimalloc/vcpkg.json
+++ b/ports/mimalloc/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "mimalloc",
-  "version": "2.2.7",
+  "version": "3.2.7",
   "description": "Compact general purpose allocator with excellent performance",
   "homepage": "https://github.com/microsoft/mimalloc",
   "license": "MIT",
diff --git a/scripts/test_ports/vcpkg-ci-mimalloc/build-type.diff b/scripts/test_ports/vcpkg-ci-mimalloc/build-type.diff
index 78865761fe..d412ccaa9a 100644
--- a/scripts/test_ports/vcpkg-ci-mimalloc/build-type.diff
+++ b/scripts/test_ports/vcpkg-ci-mimalloc/build-type.diff
@@ -1,8 +1,8 @@
 diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
-index c5fff1a..03a86ca 100644
+index 199f4809..beae8345 100644
 --- a/test/CMakeLists.txt
 +++ b/test/CMakeLists.txt
-@@ -20,6 +20,7 @@ find_package(mimalloc 2.2 CONFIG REQUIRED)
+@@ -20,6 +20,7 @@ find_package(mimalloc CONFIG REQUIRED)
  message(STATUS "Found mimalloc installed at: ${MIMALLOC_LIBRARY_DIR} (${MIMALLOC_VERSION_DIR})")
  
  
@@ -17,7 +17,7 @@ index c5fff1a..03a86ca 100644
 +endif()
  
  
-+if(0)
++if(MIMALLOC_OBJECT_DIR)
  # overriding with a static object file works reliable as the symbols in the
  # object file have priority over those in library files
  add_executable(static-override-obj main-override.c ${MIMALLOC_OBJECT_DIR}/mimalloc${CMAKE_C_OUTPUT_EXTENSION})
diff --git a/scripts/test_ports/vcpkg-ci-mimalloc/portfile.cmake b/scripts/test_ports/vcpkg-ci-mimalloc/portfile.cmake
index 8a46d4c502..31d1a50f32 100644
--- a/scripts/test_ports/vcpkg-ci-mimalloc/portfile.cmake
+++ b/scripts/test_ports/vcpkg-ci-mimalloc/portfile.cmake
@@ -1,12 +1,13 @@
 set(VCPKG_POLICY_EMPTY_PACKAGE enabled)
 
 vcpkg_find_acquire_program(PKGCONFIG)
+set(ENV{PKG_CONFIG} "${PKGCONFIG}")
 
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO microsoft/mimalloc
     REF "v${VERSION}"
-    SHA512 55262050f63868e3029cd929a74d312dc0f34b606534b1d0b3735eecc8eed68aae97523a50228b4ac4044e1e03192f2909440e3a27607e2d364607ac0bda828f
+    SHA512 a674dbe119e080630de0af12a972af9fb1ac3611413fd5a7eb14f61e47af620f6368a28e8849757136fcc1c3c4f8f776cfa0f351d3f0ef463eff98fdf8c4db52
     HEAD_REF master
     PATCHES
         build-type.diff
@@ -22,12 +23,11 @@ vcpkg_cmake_configure(
     SOURCE_PATH "${SOURCE_PATH}/test"
     OPTIONS
         "-DCMAKE_PROJECT_INCLUDE=${CURRENT_PORT_DIR}/vcpkg-tests.cmake"
-        "-DPKG_CONFIG_EXECUTABLE=${PKGCONFIG}"
+        "-DFEATURES=${FEATURES}"
 )
 
 set(ENV{MIMALLOC_VERBOSE} 1)
 set(ENV{MIMALLOC_SHOW_ERRORS} 1)
-set(ENV{MIMALLOC_DISABLE_REDIRECT} 1)
 
 vcpkg_cmake_install(ADD_BIN_TO_PATH)
 
diff --git a/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg-tests.cmake b/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg-tests.cmake
index 659cb7db66..0b70ee1f18 100644
--- a/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg-tests.cmake
+++ b/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg-tests.cmake
@@ -31,19 +31,27 @@ if(BUILD_SHARED_LIBS OR NOT WIN32)
     target_link_libraries(pkgconfig-override-cxx PRIVATE PkgConfig::PC_MIMALLOC)
 endif()
 
+# overriding allocation in a DLL that is compiled independent of mimalloc
+# https://github.com/microsoft/mimalloc/blob/dev/readme.md#dynamic-override-on-windows
+
+if(BUILD_SHARED_LIBS AND WIN32 AND "override" IN_LIST FEATURES)
+    add_library(mimalloc-test-override-dep SHARED main-override-dep.cpp)
+    target_link_libraries(dynamic-override-cxx PRIVATE mimalloc-test-override-dep)
+    target_link_libraries(pkgconfig-override-cxx PRIVATE mimalloc-test-override-dep)
+endif()
+
 # Runtime
 
 if(NOT CMAKE_CROSSCOMPILING)
-    if(BUILD_SHARED_LIBS)
-        add_custom_target(run-dynamic-override ALL COMMAND $<TARGET_NAME:dynamic-override>)
-        add_custom_target(run-dynamic-override-cxx ALL COMMAND $<TARGET_NAME:dynamic-override-cxx>)
-    elseif(NOT WIN32)
-        add_custom_target(run-static-override ALL COMMAND $<TARGET_NAME:static-override>)
-        add_custom_target(run-static-override-cxx ALL COMMAND $<TARGET_NAME:static-override-cxx>)
-    endif()
-    if(TARGET pkgconfig-override-cxx)
-        add_custom_target(run-pkgconfig-override-cxx ALL COMMAND $<TARGET_NAME:pkgconfig-override-cxx>)
-    endif()
+    get_directory_property(targets BUILDSYSTEM_TARGETS)
+    set(expected_fails test-wrong)
+    list(REMOVE_ITEM targets ${expected_fails})
+    foreach(target IN LISTS targets)
+        get_target_property(type ${target} TYPE)
+        if(type STREQUAL "EXECUTABLE")
+            add_custom_target(run-${target} ALL COMMAND ${target})
+        endif()       
+    endforeach()
 endif()
 
 # Deployment
diff --git a/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg.json b/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg.json
index 9c453dd098..47cf64cb99 100644
--- a/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg.json
+++ b/scripts/test_ports/vcpkg-ci-mimalloc/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "vcpkg-ci-mimalloc",
-  "version": "2.2.3",
+  "version": "3.2.6",
   "description": "Validates mimalloc",
   "dependencies": [
     "mimalloc",
@@ -9,23 +9,36 @@
       "host": true
     }
   ],
+  "default-features": [
+    {
+      "name": "override",
+      "platform": "native | (windows & !static)"
+    },
+    {
+      "name": "secure",
+      "platform": "native"
+    }
+  ],
   "features": {
-    "ci": {
-      "description": "Test feature permutation",
+    "override": {
+      "description": "Test override feature",
       "dependencies": [
         {
           "name": "mimalloc",
           "features": [
             "override"
-          ],
-          "platform": "native & !(windows & static)"
-        },
+          ]
+        }
+      ]
+    },
+    "secure": {
+      "description": "Test secure feature",
+      "dependencies": [
         {
           "name": "mimalloc",
           "features": [
             "secure"
-          ],
-          "platform": "arm64 & static"
+          ]
         }
       ]
     }
diff --git a/versions/baseline.json b/versions/baseline.json
index 711c0fe8fa..e3f9b62151 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -6409,7 +6409,7 @@
       "port-version": 3
     },
     "mimalloc": {
-      "baseline": "2.2.7",
+      "baseline": "3.2.7",
       "port-version": 0
     },
     "mimicpp": {
diff --git a/versions/m-/mimalloc.json b/versions/m-/mimalloc.json
index 07ab55660c..26c0218f85 100644
--- a/versions/m-/mimalloc.json
+++ b/versions/m-/mimalloc.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "7617731f2dfaea0ce243f3355ed8c0bc7d5e0dc9",
+      "version": "3.2.7",
+      "port-version": 0
+    },
     {
       "git-tree": "5b9c09b6d1592392634727afb0abbe0b14e030a2",
       "version": "2.2.7",