diff --git a/third_party/function2/appveyor.yml b/third_party/function2/appveyor.yml
--- a/third_party/function2/appveyor.yml
+++ b/third_party/function2/appveyor.yml
@@ -14,14 +14,11 @@
       FU2_WITH_CPP_LATEST: ON
 
 platform:
   - x64
 
-clone_script:
-  - cmd: git clone -q --branch=%APPVEYOR_REPO_BRANCH% https://github.com/%APPVEYOR_REPO_NAME%.git %APPVEYOR_BUILD_FOLDER%
-  - cmd: cd %APPVEYOR_BUILD_FOLDER%
-  - cmd: git checkout -qf %APPVEYOR_REPO_COMMIT%
+install:
   - cmd: git submodule update --init --recursive
 
 before_build:
   - cmd: >
          cmake -H. -Bbuild -A%PLATFORM%
diff --git a/third_party/function2/include/function2/function2.hpp b/third_party/function2/include/function2/function2.hpp
--- a/third_party/function2/include/function2/function2.hpp
+++ b/third_party/function2/include/function2/function2.hpp
@@ -1082,11 +1082,13 @@
   /// We extend the union through a technique similar to the tail object hack
   typedef union {
     /// Tag to access the structure in a type-safe way
     data_accessor accessor_;
     /// The internal capacity we use to allocate in-place
-    std::aligned_storage_t<Capacity::capacity, Capacity::alignment> capacity_;
+    struct alignas(Capacity::alignment) {
+      unsigned char data[Capacity::capacity];
+    } capacity_;
   } type;
 };
 template <typename Capacity>
 struct internal_capacity<
     Capacity, std::enable_if_t<(Capacity::capacity < sizeof(void*))>> {
diff --git a/third_party/function2/moz.yaml b/third_party/function2/moz.yaml
--- a/third_party/function2/moz.yaml
+++ b/third_party/function2/moz.yaml
@@ -8,13 +8,13 @@
   name: function2
   description: Improved and configurable drop-in replacement to std::function
 
   url: https://naios.github.io/function2/
 
-  release: 43fc0ca473ecb081918709bd7d524d84c2ff8dce (2024-02-25T17:37:03Z).
+  release: 496c20fede5378190fff471fcd7ee3d8705e5096 (2025-07-17T20:32:21Z).
 
-  revision: 43fc0ca473ecb081918709bd7d524d84c2ff8dce
+  revision: 496c20fede5378190fff471fcd7ee3d8705e5096
 
   license: BSL-1.0
   license-file: LICENSE.txt
 
 updatebot: