diff --git a/app/data/stacks/fixturenet-optimism/README.md b/app/data/stacks/fixturenet-optimism/README.md
index d8a7966f..7664a7c3 100644
--- a/app/data/stacks/fixturenet-optimism/README.md
+++ b/app/data/stacks/fixturenet-optimism/README.md
@@ -19,7 +19,7 @@ Checkout to the required versions and branches in repos:
 ```bash
 # Optimism
 cd ~/cerc/optimism
-git checkout v1.0.3
+git checkout v1.0.4
 ```
 
 Build the container images:
diff --git a/app/data/stacks/fixturenet-optimism/l2-only.md b/app/data/stacks/fixturenet-optimism/l2-only.md
index 0396bf6a..8cac9ce1 100644
--- a/app/data/stacks/fixturenet-optimism/l2-only.md
+++ b/app/data/stacks/fixturenet-optimism/l2-only.md
@@ -19,7 +19,7 @@ Checkout to the required versions and branches in repos:
 ```bash
 # Optimism
 cd ~/cerc/optimism
-git checkout v1.0.3
+git checkout v1.0.4
 ```
 
 Build the container images:
diff --git a/app/data/stacks/mobymask-v2/README.md b/app/data/stacks/mobymask-v2/README.md
index a123c203..32fdbf60 100644
--- a/app/data/stacks/mobymask-v2/README.md
+++ b/app/data/stacks/mobymask-v2/README.md
@@ -35,7 +35,7 @@ git checkout v0.1.2
 
 # Optimism
 cd ~/cerc/optimism
-git checkout v1.0.3
+git checkout v1.0.4
 ```
 
 Build the container images: