diff --git a/.github/depends/zlib.sh b/.github/depends/zlib.sh
index 1afe6afac..c69881481 100755
--- a/.github/depends/zlib.sh
+++ b/.github/depends/zlib.sh
@@ -27,10 +27,10 @@ while getopts "b:t:p:" c; do
 done
 
 mkdir $prefix || exit 1
-wget https://zlib.net/current/zlib.tar.gz || exit 1
-mkdir zlib
-tar -xf zlib.tar.gz -C zlib || exit 1
-cd $(dirname $(find zlib -name zlib.h))
+
+wget https://zlib.net/zlib-1.3.1.tar.gz || exit 1
+tar -xf zlib-1.3.1.tar.gz || exit 1
+cd zlib-1.3.1
 
 build()
 {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73199b017..68efc57c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 2024-04-02 version 6.1.1
+  * Fix compilation error when std::variant has the same types (#1112)
+  * Improve CI (#1090, #1110)
+  * Fix to avoid common function name's (has_as::check) ambiguity/conflict with other libraries' macros  (#1085)
+
 # 2023-07-08 version 6.1.0
   * Remove dependency on boost in chrono.hpp (#1076)
   * Add support for std::variant behavior (#1075)
diff --git a/QUICKSTART-CPP.md b/QUICKSTART-CPP.md
index fd4fadbc3..a9dc8fd8d 100644
--- a/QUICKSTART-CPP.md
+++ b/QUICKSTART-CPP.md
@@ -12,7 +12,7 @@ Same as QuickStart for C Language.
 
 ## First program
 
-Include `msgpack.hpp` header and link `msgpack` library to use MessagePack on your program.
+Include `msgpack.hpp` header to use MessagePack on your program.
 
 ```cpp
 #include <msgpack.hpp>
diff --git a/README.md b/README.md
index cf578c540..31d29e800 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 `msgpack` for C++
 ===================
 
-Version 6.1.0 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
+Version 6.1.1 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
 [![codecov](https://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master/graph/badge.svg)](https://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master)
 
 It's like JSON but smaller and faster.
diff --git a/appveyor.yml b/appveyor.yml
index f730f79af..2e71a4f71 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 6.1.0.{build}
+version: 6.1.1.{build}
 
 branches:
   only:
@@ -23,9 +23,11 @@ environment:
       boost_subdir: lib32-msvc-14.0
 build_script:
   - ps: |
-      appveyor DownloadFile https://zlib.net/current/zlib.tar.gz -FileName zlib.tar.gz
-      7z x zlib.tar.gz 2> $null
-      7z x zlib.tar 2> $null
+
+      appveyor DownloadFile http://zlib.net/zlib-1.3.1.tar.gz -FileName zlib-1.3.1.tar.gz
+      7z x zlib-1.3.1.tar.gz 2> $null
+      7z x zlib-1.3.1.tar 2> $null
+
       cd zlib-1.3.1
 
       md build
diff --git a/include/msgpack/v1/adaptor/cpp17/variant.hpp b/include/msgpack/v1/adaptor/cpp17/variant.hpp
index 2ddb6b6e6..d96a15eb0 100644
--- a/include/msgpack/v1/adaptor/cpp17/variant.hpp
+++ b/include/msgpack/v1/adaptor/cpp17/variant.hpp
@@ -40,11 +40,11 @@ Variant construct_variant(
     std::index_sequence<current_index, indices...>
 ) {
     if constexpr(sizeof...(Ts) == 0) {
-        return object.as<T>();
+        return Variant{std::in_place_index<current_index>, object.as<T>()};
     }
     else {
         if (index == current_index) {
-            return object.as<T>();
+            return Variant{std::in_place_index<current_index>, object.as<T>()};
         }
         return construct_variant<Variant, Ts...>(
             index,
diff --git a/include/msgpack/version_master.hpp b/include/msgpack/version_master.hpp
index ad76f7373..e844bcd15 100644
--- a/include/msgpack/version_master.hpp
+++ b/include/msgpack/version_master.hpp
@@ -1,3 +1,3 @@
 #define MSGPACK_VERSION_MAJOR    6
 #define MSGPACK_VERSION_MINOR    1
-#define MSGPACK_VERSION_REVISION 0
+#define MSGPACK_VERSION_REVISION 1
diff --git a/test/msgpack_cpp17.cpp b/test/msgpack_cpp17.cpp
index b20c04ccd..be3d9d410 100644
--- a/test/msgpack_cpp17.cpp
+++ b/test/msgpack_cpp17.cpp
@@ -474,6 +474,28 @@ BOOST_AUTO_TEST_CASE(variant_pack_unpack_as) {
         oh.get().as<std::variant<bool, int, float, double> >();
     BOOST_CHECK(val1 == val2);
     BOOST_CHECK_THROW((oh.get().as<std::variant<bool>>()), msgpack::type_error);
+
+    {
+      std::stringstream same_ss;
+      std::variant<int, float, int> same_expected{std::in_place_index<2>, 2};
+      msgpack::pack(same_ss, same_expected);
+      std::string const& same_str = same_ss.str();
+      msgpack::object_handle same_oh =
+          msgpack::unpack(same_str.data(), same_str.size());
+      std::variant<int, float, int> same_actual = same_oh->as<std::variant<int, float, int>>();
+      BOOST_CHECK(same_expected == same_actual);
+    }
+
+    {
+      std::stringstream same_ss;
+      std::variant<int, int> same_expected{std::in_place_index<1>, 2};
+      msgpack::pack(same_ss, same_expected);
+      std::string const& same_str = same_ss.str();
+      msgpack::object_handle same_oh =
+          msgpack::unpack(same_str.data(), same_str.size());
+      std::variant<int, int> same_actual = same_oh->as<std::variant<int, int>>();
+      BOOST_CHECK(same_expected == same_actual);
+    }
 }
 
 BOOST_AUTO_TEST_CASE(variant_with_zone) {