diff --git a/README.md b/README.md
index d1b9c793..a817a1f9 100644
--- a/README.md
+++ b/README.md
@@ -376,7 +376,7 @@ go install -v github.com/goplus/llgo/cmd/llgo@latest
 echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-18 main" | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update
-sudo apt-get install -y llvm-18-dev clang-18 libclang-18-dev lld-18 pkg-config libgc-dev libssl-dev zlib1g-dev libcjson-dev libsqlite3-dev
+sudo apt-get install -y llvm-18-dev clang-18 libclang-18-dev lld-18 pkg-config libgc-dev libssl-dev zlib1g-dev libcjson-dev libsqlite3-dev libunwind-dev
 sudo apt-get install -y python3.12-dev # optional
 go install -v github.com/goplus/llgo/cmd/llgo@latest
 ```
diff --git a/doc/_readme/scripts/install_ubuntu.sh b/doc/_readme/scripts/install_ubuntu.sh
index b36e42d7..e749f237 100644
--- a/doc/_readme/scripts/install_ubuntu.sh
+++ b/doc/_readme/scripts/install_ubuntu.sh
@@ -2,6 +2,6 @@
 echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-18 main" | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update
-sudo apt-get install -y llvm-18-dev clang-18 libclang-18-dev lld-18 pkg-config libgc-dev libssl-dev zlib1g-dev libcjson-dev libsqlite3-dev
+sudo apt-get install -y llvm-18-dev clang-18 libclang-18-dev lld-18 pkg-config libgc-dev libssl-dev zlib1g-dev libcjson-dev libsqlite3-dev libunwind-dev
 sudo apt-get install -y python3.12-dev # optional
 go install -v github.com/goplus/llgo/cmd/llgo@latest
\ No newline at end of file