diff --git a/tools/installer/README.md b/tools/installer/README.md
index 02e487f2..9b8fc3b2 100644
--- a/tools/installer/README.md
+++ b/tools/installer/README.md
@@ -14,7 +14,7 @@ To evaluate Occlum in non-docker environment, installers are needed. Occlum prov
 
 Normally, Occlum installers should be provided together with release. However, users can also build them on their own.
 
-To build RPM packages, a docker container with Occlum CentOS image (based on CentOS 8.1) is needed. Execute below commands under the occlum directory:
+To build RPM packages, a docker container with Occlum CentOS image (based on CentOS 8.2) is needed. Execute below commands under the occlum directory:
 ```
 cd tools/installer/rpm
 make
@@ -42,11 +42,11 @@ yum install -y ocaml ocaml-ocamlbuild
 ```
 
 **Step 2. Install Intel® SGX driver and Intel® SGX PSW**
-Please follow [Intel SGX Installation Guide](https://download.01.org/intel-sgx/sgx-linux/2.9.1/docs/Intel_SGX_Installation_Guide_Linux_2.9.1_Open_Source.pdf) to install SGX driver and SGX PSW. SGX SDK is not required. Using RPM installer is recommanded.
+Please follow [Intel SGX Installation Guide](https://download.01.org/intel-sgx/sgx-linux/2.13/docs/Intel_SGX_Installation_Guide_Linux_2.13_Open_Source.pdf) to install SGX driver and SGX PSW. SGX SDK is not required. Using RPM installer is recommanded.
 
 Also, UAE service libraries are needed but may not installed together with SGX PSW if SGX PSW installer is used. Go to SGX RPM local repo and run:
 ```
-rpm -i libsgx-uae-service-2.9.101.2-1.el7.x86_64.rpm
+rpm -i libsgx-uae-service-*.rpm
 ```
 
 **Step 3. Install enable_RDFSBASE Kernel Module**
@@ -121,7 +121,7 @@ apt-get install -y --no-install-recommends libcurl4-openssl-dev libssl-dev libpr
 ```
 
 **Step 2. Install Intel® SGX driver and Intel® SGX PSW**
-Please follow [Intel SGX Installation Guide](https://download.01.org/intel-sgx/sgx-linux/2.9.1/docs/Intel_SGX_Installation_Guide_Linux_2.9.1_Open_Source.pdf) to install SGX driver and SGX PSW. SGX SDK is not required. Using PSW installer is recommanded.
+Please follow [Intel SGX Installation Guide](https://download.01.org/intel-sgx/sgx-linux/2.13/docs/Intel_SGX_Installation_Guide_Linux_2.13_Open_Source.pdf) to install SGX driver and SGX PSW. SGX SDK is not required. Using PSW installer is recommanded.
 
 To install PSW, follow the guide to add Intel® SGX repository to apt source. And then run:
 ```
@@ -131,7 +131,7 @@ apt-get install -y libsgx-epid libsgx-urts libsgx-quote-ex libsgx-uae-service
 
 After installing PSW, please make sure that the aesm service is running:
 ```
-service status aesmd
+service aesmd status
 ```
 
 **Step 3. Install enable_RDFSBASE Kernel Module**