diff --git a/app/data/stacks/fixturenet-optimism/README.md b/app/data/stacks/fixturenet-optimism/README.md
index 02e06a4..0fd4f94 100644
--- a/app/data/stacks/fixturenet-optimism/README.md
+++ b/app/data/stacks/fixturenet-optimism/README.md
@@ -14,14 +14,6 @@ laconic-so --stack fixturenet-optimism setup-repositories
 # If this throws an error as a result of being already checked out to a branch/tag in a repo, remove the repositories mentioned below and re-run the command
 ```
 
-Checkout to the required versions and branches in repos:
-
-```bash
-# Optimism
-cd ~/cerc/optimism
-git checkout v1.0.4
-```
-
 Build the container images:
 
 ```bash
diff --git a/app/data/stacks/fixturenet-optimism/stack.yml b/app/data/stacks/fixturenet-optimism/stack.yml
index 61570e4..c483b8d 100644
--- a/app/data/stacks/fixturenet-optimism/stack.yml
+++ b/app/data/stacks/fixturenet-optimism/stack.yml
@@ -3,12 +3,14 @@ name: fixturenet-optimism
 decription: "Optimism Fixturenet"
 repos:
   - github.com/cerc-io/go-ethereum
+  - github.com/cerc-io/lighthouse
   - github.com/dboreham/foundry
-  - github.com/ethereum-optimism/optimism
-  - github.com/ethereum-optimism/op-geth
+  - github.com/ethereum-optimism/optimism@v1.0.4
+  - github.com/ethereum-optimism/op-geth@v1.101105.2
 containers:
   - cerc/go-ethereum
   - cerc/lighthouse
+  - cerc/lighthouse-cli
   - cerc/fixturenet-eth-geth
   - cerc/fixturenet-eth-lighthouse
   - cerc/foundry