diff --git a/zkstack_cli/crates/zkstack/completion/_zkstack.zsh b/zkstack_cli/crates/zkstack/completion/_zkstack.zsh
index ba9feb65410..0c812a5f5b3 100644
--- a/zkstack_cli/crates/zkstack/completion/_zkstack.zsh
+++ b/zkstack_cli/crates/zkstack/completion/_zkstack.zsh
@@ -82,6 +82,7 @@ in-file\:"Specify file with wallets"))' \
 '--base-token-price-denominator=[Base token denominator]:BASE_TOKEN_PRICE_DENOMINATOR:_default' \
 '--set-as-default=[Set as default chain]' \
 '--evm-emulator=[Enable EVM emulator]' \
+'--l1-network=[L1 Network]:L1_NETWORK:(localhost sepolia holesky mainnet)' \
 '--start-containers=[Start reth and postgres containers after creation]' \
 '--chain=[Chain to use]:CHAIN:_default' \
 '--legacy-bridge[]' \
@@ -243,6 +244,7 @@ in-file\:"Specify file with wallets"))' \
 '--base-token-price-denominator=[Base token denominator]:BASE_TOKEN_PRICE_DENOMINATOR:_default' \
 '--set-as-default=[Set as default chain]' \
 '--evm-emulator=[Enable EVM emulator]' \
+'--l1-network=[L1 Network]:L1_NETWORK:(localhost sepolia holesky mainnet)' \
 '--chain=[Chain to use]:CHAIN:_default' \
 '--legacy-bridge[]' \
 '-v[Verbose mode]' \
diff --git a/zkstack_cli/crates/zkstack/completion/zkstack.fish b/zkstack_cli/crates/zkstack/completion/zkstack.fish
index 81e1db8a61f..488d28f27b5 100644
--- a/zkstack_cli/crates/zkstack/completion/zkstack.fish
+++ b/zkstack_cli/crates/zkstack/completion/zkstack.fish
@@ -71,6 +71,7 @@ complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_se
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l base-token-price-denominator -d 'Base token denominator' -r
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l set-as-default -d 'Set as default chain' -r -f -a "{true\t'',false\t''}"
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l evm-emulator -d 'Enable EVM emulator' -r -f -a "{true\t'',false\t''}"
+complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l l1-network -d 'L1 Network' -r -f -a "{localhost\t'',sepolia\t'',holesky\t'',mainnet\t''}"
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l start-containers -d 'Start reth and postgres containers after creation' -r -f -a "{true\t'',false\t''}"
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l chain -d 'Chain to use' -r
 complete -c zkstack -n "__fish_zkstack_using_subcommand ecosystem; and __fish_seen_subcommand_from create" -l legacy-bridge
@@ -158,6 +159,7 @@ complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_s
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l base-token-price-denominator -d 'Base token denominator' -r
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l set-as-default -d 'Set as default chain' -r -f -a "{true\t'',false\t''}"
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l evm-emulator -d 'Enable EVM emulator' -r -f -a "{true\t'',false\t''}"
+complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l l1-network -d 'L1 Network' -r -f -a "{localhost\t'',sepolia\t'',holesky\t'',mainnet\t''}"
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l chain -d 'Chain to use' -r
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -l legacy-bridge
 complete -c zkstack -n "__fish_zkstack_using_subcommand chain; and __fish_seen_subcommand_from create" -s v -l verbose -d 'Verbose mode'
diff --git a/zkstack_cli/crates/zkstack/completion/zkstack.sh b/zkstack_cli/crates/zkstack/completion/zkstack.sh
index bbb413459ea..02bb834d07b 100644
--- a/zkstack_cli/crates/zkstack/completion/zkstack.sh
+++ b/zkstack_cli/crates/zkstack/completion/zkstack.sh
@@ -1427,7 +1427,7 @@ _zkstack() {
             return 0
             ;;
         zkstack__chain__create)
-            opts="-v -h --chain-name --chain-id --prover-mode --wallet-creation --wallet-path --l1-batch-commit-data-generator-mode --base-token-address --base-token-price-nominator --base-token-price-denominator --set-as-default --legacy-bridge --evm-emulator --verbose --chain --ignore-prerequisites --help"
+            opts="-v -h --chain-name --chain-id --prover-mode --wallet-creation --wallet-path --l1-batch-commit-data-generator-mode --base-token-address --base-token-price-nominator --base-token-price-denominator --set-as-default --legacy-bridge --evm-emulator --l1-network --verbose --chain --ignore-prerequisites --help"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1488,6 +1488,10 @@ _zkstack() {
                     COMPREPLY=($(compgen -W "true false" -- "${cur}"))
                     return 0
                     ;;
+                --l1-network)
+                    COMPREPLY=($(compgen -W "localhost sepolia holesky mainnet" -- "${cur}"))
+                    return 0
+                    ;;
                 --chain)
                     COMPREPLY=($(compgen -f "${cur}"))
                     return 0
@@ -4796,7 +4800,7 @@ _zkstack() {
             return 0
             ;;
         zkstack__ecosystem__create)
-            opts="-v -h --ecosystem-name --l1-network --link-to-code --chain-name --chain-id --prover-mode --wallet-creation --wallet-path --l1-batch-commit-data-generator-mode --base-token-address --base-token-price-nominator --base-token-price-denominator --set-as-default --legacy-bridge --evm-emulator --start-containers --verbose --chain --ignore-prerequisites --help"
+            opts="-v -h --ecosystem-name --l1-network --link-to-code --chain-name --chain-id --prover-mode --wallet-creation --wallet-path --l1-batch-commit-data-generator-mode --base-token-address --base-token-price-nominator --base-token-price-denominator --set-as-default --legacy-bridge --evm-emulator --l1-network --start-containers --verbose --chain --ignore-prerequisites --help"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -4872,6 +4876,10 @@ _zkstack() {
                     COMPREPLY=($(compgen -W "true false" -- "${cur}"))
                     return 0
                     ;;
+                --l1-network)
+                    COMPREPLY=($(compgen -W "localhost sepolia holesky mainnet" -- "${cur}"))
+                    return 0
+                    ;;
                 --start-containers)
                     COMPREPLY=($(compgen -W "true false" -- "${cur}"))
                     return 0