diff --git a/CMakeLists.txt b/CMakeLists.txt
index aba5a56..ab199ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@ project(zswag)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(ZSWAG_VERSION 1.6.3)
+set(ZSWAG_VERSION 1.6.4)
 
 option(ZSWAG_BUILD_WHEELS "Enable zswag whl-output to WHEEL_DEPLOY_DIRECTORY." ON)
 option(ZSWAG_KEYCHAIN_SUPPORT "Enable zswag keychain support." ON)
@@ -104,7 +104,7 @@ endif()
 if (NOT TARGET httplib)
   FetchContent_Declare(httplib
     GIT_REPOSITORY "https://github.com/yhirose/cpp-httplib.git"
-    GIT_TAG        "v0.13.1"
+    GIT_TAG        "v0.15.0"
     GIT_SHALLOW    ON)
   FetchContent_MakeAvailable(httplib)
   target_compile_definitions(httplib
@@ -165,20 +165,20 @@ message(STATUS "OpenSSL include dir: ${OPENSSL_INCLUDE_DIR}")
 if(APPLE)
   set(OPENSSL_LIB_DIR "${OPENSSL_INCLUDE_DIR}/../lib")
   set(OPENSSL_LIBS
-    "${OPENSSL_LIB_DIR}/libcrypto.1.1.dylib"
-    "${OPENSSL_LIB_DIR}/libssl.1.1.dylib"
+      "${OPENSSL_LIB_DIR}/libcrypto.3.dylib"
+      "${OPENSSL_LIB_DIR}/libssl.3.dylib"
   )
 elseif(MSVC)
   set(OPENSSL_LIB_DIR "${OPENSSL_INCLUDE_DIR}/../bin")
   set(OPENSSL_LIBS
-      "${OPENSSL_LIB_DIR}/libcrypto-1_1-x64.dll"
-      "${OPENSSL_LIB_DIR}/libssl-1_1-x64.dll"
+      "${OPENSSL_LIB_DIR}/libcrypto-3-x64.dll"
+      "${OPENSSL_LIB_DIR}/libssl-3-x64.dll"
   )
 elseif(UNIX AND NOT APPLE)
   set(OPENSSL_LIB_DIR "${OPENSSL_INCLUDE_DIR}/../lib")
   set(OPENSSL_LIBS
-      "${OPENSSL_LIB_DIR}/libcrypto.so.1.1"
-      "${OPENSSL_LIB_DIR}/libssl.so.1.1"
+      "${OPENSSL_LIB_DIR}/libcrypto.so.3"
+      "${OPENSSL_LIB_DIR}/libssl.so.3"
   )
 endif()
 
diff --git a/conanfile.txt b/conanfile.txt
index 44ecebc..837e863 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,5 +1,5 @@
 [requires]
-openssl/1.1.1t
+openssl/3.2.0
 keychain/1.2.1
 spdlog/1.11.0
 pybind11/2.10.4
diff --git a/libs/pyzswagcl/CMakeLists.txt b/libs/pyzswagcl/CMakeLists.txt
index 5640fb6..2c0e8f2 100644
--- a/libs/pyzswagcl/CMakeLists.txt
+++ b/libs/pyzswagcl/CMakeLists.txt
@@ -22,15 +22,15 @@ target_compile_features(pyzswagcl
 if (MSVC)
   # Required because cpp-httplib speaks https via OpenSSL
   set (DEPLOY_FILES
-    "${OPENSSL_INCLUDE_DIR}/../bin/libcrypto-1_1-x64.dll"
-    "${OPENSSL_INCLUDE_DIR}/../bin/libssl-1_1-x64.dll")
+    "${OPENSSL_INCLUDE_DIR}/../bin/libcrypto-3-x64.dll"
+    "${OPENSSL_INCLUDE_DIR}/../bin/libssl-3-x64.dll")
 endif()
 
 if (APPLE)
   # Required because cpp-httplib speaks https via OpenSSL
   set (DEPLOY_FILES
-    "${OPENSSL_INCLUDE_DIR}/../lib/libcrypto.1.1.dylib"
-    "${OPENSSL_INCLUDE_DIR}/../lib/libssl.1.1.dylib")
+    "${OPENSSL_INCLUDE_DIR}/../lib/libcrypto.3.dylib"
+    "${OPENSSL_INCLUDE_DIR}/../lib/libssl.3.dylib")
 endif()
 
 add_wheel(pyzswagcl