diff --git a/stack_orchestrator/data/container-build/cerc-fixturenet-lotus/build.sh b/stack_orchestrator/data/container-build/cerc-fixturenet-lotus/build.sh
index 341a0d50..a4188922 100755
--- a/stack_orchestrator/data/container-build/cerc-fixturenet-lotus/build.sh
+++ b/stack_orchestrator/data/container-build/cerc-fixturenet-lotus/build.sh
@@ -4,7 +4,7 @@ source ${CERC_CONTAINER_BASE_DIR}/build-base.sh
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
 # Use a release version tag to match the modified Dockerfile replaced in next step
-git -C ${CERC_REPO_BASE_DIR}/lotus checkout master
+git -C ${CERC_REPO_BASE_DIR}/lotus checkout main
 
 # Replace repo's Dockerfile with modified one
 cp ${SCRIPT_DIR}/Dockerfile ${CERC_REPO_BASE_DIR}/lotus/Dockerfile
diff --git a/stack_orchestrator/data/container-build/cerc-mainnet-lotus/build.sh b/stack_orchestrator/data/container-build/cerc-mainnet-lotus/build.sh
index 70236044..904c46db 100755
--- a/stack_orchestrator/data/container-build/cerc-mainnet-lotus/build.sh
+++ b/stack_orchestrator/data/container-build/cerc-mainnet-lotus/build.sh
@@ -4,7 +4,7 @@ source ${CERC_CONTAINER_BASE_DIR}/build-base.sh
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
 # Use a release version tag to match the modified Dockerfile replaced in next step
-git -C ${CERC_REPO_BASE_DIR}/lotus checkout master
+git -C ${CERC_REPO_BASE_DIR}/lotus checkout main
 
 # Replace repo's Dockerfile with modified one
 cp ${SCRIPT_DIR}/Dockerfile ${CERC_REPO_BASE_DIR}/lotus/Dockerfile