diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e9c2b91..d2cee2ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,9 +18,9 @@ if(NOT ${PREBUILD_RESULT} EQUAL 0)
 endif()
 
 if(MSVC)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR- /EHsc /utf-8 /O2")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /utf-8 /O2")
 else()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fexceptions -O2")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions -O2")
 endif()
 
 include_directories(${CMAKE_CURRENT_LIST_DIR}/include)
diff --git a/README.md b/README.md
index 818a48ed..6a4a5f61 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,6 @@ To compile it with your project, these flags must be set:
 
 + `--std=c++17` flag must be set
 + Exception must be enabled
-+ RTTI is not required
 
 ### Example
 
diff --git a/build.sh b/build.sh
index 630e9e92..5c81603d 100644
--- a/build.sh
+++ b/build.sh
@@ -1,14 +1,16 @@
 python3 prebuild.py
 SRC=$(find src/ -name "*.cpp")
-FLAGS="-std=c++17 -fno-rtti -O2 -stdlib=libc++ -Wfatal-errors -Iinclude"
+FLAGS="-std=c++17 -O2 -stdlib=libc++ -Wfatal-errors -Iinclude"
 
 if [[ "$OSTYPE" == "darwin"* ]]; then
     LIB_EXTENSION=".dylib"
     FLAGS="$FLAGS -undefined dynamic_lookup"
+    LINK_FLAGS=""
 else
     LIB_EXTENSION=".so"
+    LINK_FLAGS="-Wl,-rpath=."
 fi
 clang++ $FLAGS -o libpocketpy$LIB_EXTENSION $SRC -fPIC -shared -ldl
 
 # compile main.cpp and link to libpocketpy.so
-clang++ $FLAGS -o main src2/main.cpp -L. -lpocketpy -Wl,-rpath=.
\ No newline at end of file
+clang++ $FLAGS -o main src2/main.cpp -L. -lpocketpy $LINK_FLAGS
\ No newline at end of file
diff --git a/build_web.sh b/build_web.sh
index bfc5738a..9ed30b58 100644
--- a/build_web.sh
+++ b/build_web.sh
@@ -4,4 +4,4 @@ rm -rf web/lib
 mkdir web/lib
 
 SRC=$(find src/ -name "*.cpp")
-em++ $SRC -Iinclude/ -fno-rtti -fexceptions -O3 -sEXPORTED_FUNCTIONS=_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_vm -sEXPORTED_RUNTIME_METHODS=ccall -o web/lib/pocketpy.js
\ No newline at end of file
+em++ $SRC -Iinclude/ -fexceptions -O3 -sEXPORTED_FUNCTIONS=_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_vm -sEXPORTED_RUNTIME_METHODS=ccall -o web/lib/pocketpy.js
\ No newline at end of file
diff --git a/docs/quick-start/installation.md b/docs/quick-start/installation.md
index 3de66c02..28c4fa27 100644
--- a/docs/quick-start/installation.md
+++ b/docs/quick-start/installation.md
@@ -22,7 +22,6 @@ To compile it with your project, these flags must be set:
 
 + `--std=c++17` flag must be set
 + Exception must be enabled
-+ RTTI is not required
 
 ### Example
 
diff --git a/libpocketpy.dylib b/libpocketpy.dylib
new file mode 100755
index 00000000..e53981b6
Binary files /dev/null and b/libpocketpy.dylib differ
diff --git a/plugins/flutter/src/CMakeLists.txt b/plugins/flutter/src/CMakeLists.txt
index 3f2faf3d..0007b96f 100644
--- a/plugins/flutter/src/CMakeLists.txt
+++ b/plugins/flutter/src/CMakeLists.txt
@@ -13,12 +13,6 @@ add_library(pocketpy SHARED
   "pocketpy.cpp"
 )
 
-if (NOT MSVC)
-  target_compile_options(pocketpy PRIVATE -fno-rtti)
-else()
-  target_compile_options(pocketpy PRIVATE /GR- /EHsc)
-endif()
-
 set_target_properties(pocketpy PROPERTIES
   PUBLIC_HEADER pocketpy.h
   OUTPUT_NAME "pocketpy"
diff --git a/run_profile.sh b/run_profile.sh
index 18acc550..33b1cdcb 100644
--- a/run_profile.sh
+++ b/run_profile.sh
@@ -1,6 +1,6 @@
 python3 prebuild.py
 SRC=$(find src/ -name "*.cpp")
-clang++ -pg -O1 -std=c++17 -fno-rtti -stdlib=libc++ -Wfatal-errors -o main $SRC -Iinclude -ldl
+clang++ -pg -O1 -std=c++17 -stdlib=libc++ -Wfatal-errors -o main $SRC -Iinclude -ldl
 time ./main benchmarks/fib.py
 mv benchmarks/gmon.out .
 gprof pocketpy gmon.out > gprof.txt
diff --git a/run_tests.sh b/run_tests.sh
index 60dcb8ad..50b01a68 100644
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -1,6 +1,6 @@
 python3 prebuild.py
 SRC=$(find src/ -name "*.cpp")
-clang++ -std=c++17 -fno-rtti --coverage -O1 -stdlib=libc++ -Wfatal-errors -o main src2/main.cpp $SRC -Iinclude -ldl
+clang++ -std=c++17 --coverage -O1 -stdlib=libc++ -Wfatal-errors -o main src2/main.cpp $SRC -Iinclude -ldl
 python3 scripts/run_tests.py
 rm -rf .coverage
 mkdir .coverage