> For the complete documentation index, see [llms.txt](https://docs.empe.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.empe.io/empe-blockchain/overview/migration-to-v0.4.0.md).
# Migration to v0.4.0
## [Release Notes](https://github.com/empe-io/empe-chain-releases/blob/master/v0.4.0/release_notes.md)
### For Linux AMD Distributions
### Install Go 1.23.0 on Linux (manually)
1. **Remove the old Go version (if installed manually):**
```bash
sudo rm -rf /usr/local/go
```
***
2. **Download Go 1.23.0 tarball:**
```bash
wget https://go.dev/dl/go1.23.0.linux-amd64.tar.gz
```
***
3. **Extract and install to `/usr/local`:**
```bash
sudo tar -C /usr/local -xzf go1.23.0.linux-amd64.tar.gz
```
***
4. **Add Go to your PATH (if not already added):**
Add this line to your shell config file (`~/.bashrc`, `~/.zshrc`, or `~/.profile`):
```bash
export PATH=$PATH:/usr/local/go/bin
```
Then reload your shell:
```bash
source ~/.bashrc
# or
source ~/.zshrc
```
***
5. **Verify the installation:**
```bash
go version
```
You should see:
```
go version go1.23.0 linux/amd64
```
***
### Install emped binary
Download the tar.gz file:
```
curl -LO https://github.com/empe-io/empe-chain-releases/raw/master/v0.4.0/emped_v0.4.0_linux_amd64.tar.gz
```
Verify the checksum (change filename for ARM):
```
sha256sum emped_v0.4.0_linux_amd64.tar.gz
```
You should see the following:
```
776ae05a7dd79251306a98cc947eed98aa5c99195f3cfaed0ce3e3a12a715481 emped_v0.4.0_linux_amd64.tar.gz
```
Unpack the tar.gz file:
```
tar -xvf emped_v0.4.0_linux_amd64.tar.gz
```
Move the binary to your local bin directory:
```
mkdir -p ~/go/bin
sudo mv emped ~/go/bin
```
Check the version
```
emped version
```
You should see the following:
```
0.4.0
```
### Setup cosmovisor
Create cosmovisor upgrade dir
```
export DAEMON_HOME=$HOME/.empe-chain/
mkdir -p $DAEMON_HOME/cosmovisor/upgrades/v0.4.0/bin
```
Put binary in proper dir;
```
cp ~/go/bin/emped $DAEMON_HOME/cosmovisor/upgrades/v0.4.0/bin
```
Just to be sure check version (should be 0.4.0);
```
$DAEMON_HOME/cosmovisor/upgrades/v0.4.0/bin/emped version
```
You should see the following:
```
0.4.0
```
### Common problems
#### **Cannot open or find libwasmvm before or after the migration**
**Install wasmvm library**
Create a directory for the library
```bash
mkdir ~/.empe-chain/lib
```
Download the library to the directory
```bash
wget https://github.com/CosmWasm/wasmvm/releases/download/v1.5.2/libwasmvm.x86_64.so -P ~/.empe-chain/lib
```
Add the library to the path
```bash
echo 'export LD_LIBRARY_PATH=/home/$USER/.empe-chain/lib:$LD_LIBRARY_PATH' >> ~/.profile
source ~/.profile
```
**Add wasmvm path to cosmovisor service**
Add the following line to the cosmovisor service file under the `[Service]` section. Remember to change `user_path` to your actual path
```bash
Environment="LD_LIBRARY_PATH=/home/user_path/.empe-chain/lib:$LD_LIBRARY_PATH"
```
Restart the cosmovisor service
```bash
sudo systemctl daemon-reload
sudo systemctl restart cosmovisor
```
---
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