diff --git a/CMakeLists.txt b/CMakeLists.txt
index ec3611f..520ba4b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,11 +7,19 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic -march=native")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+option(sword_optimize_for_portability "Build sword with -msse4.1" OFF)
+
+if (sword_optimize_for_portability)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
+else ()
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
+endif ()
+
 add_executable(sword
     src/chain.cpp
     src/database_alignment.cpp
diff --git a/src/main.cpp b/src/main.cpp
index e070319..095caea 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -13,7 +13,7 @@
 #include "database_alignment.hpp"
 #include "utils.hpp"
 
-static const char* version = "v1.0.3";
+static const char* version = "v1.0.4";
 
 static struct option options[] = {
     {"query", required_argument, 0, 'i'},
diff --git a/vendor/thread_pool b/vendor/thread_pool
index 048da94..5f3c48a 160000
--- a/vendor/thread_pool
+++ b/vendor/thread_pool
@@ -1 +1 @@
-Subproject commit 048da9485390ee8b8a7ecedccc598a06ca4429e2
+Subproject commit 5f3c48acc837a9019dd8cc71675723f932f75f32