diff --git a/config.sh b/config.sh
index 747c2af..20a991c 100644
--- a/config.sh
+++ b/config.sh
@@ -52,7 +52,7 @@ TUNNEL_LABELS=()
 TUNNEL_INSTANCES=()
 TUNNEL_PORTS=()
 
-for i in $(seq 0 $((tunnel_count - 1))); do
+for ((i=0; i<tunnel_count; i++)); do
     name=$(jq -r ".tunnels[$i].name // empty" "$CONFIG_FILE")
     label=$(jq -r ".tunnels[$i].label // empty" "$CONFIG_FILE")
     instance=$(jq -r ".tunnels[$i].instance // empty" "$CONFIG_FILE")
@@ -109,7 +109,7 @@ SSH_FORWARDS=()
 SSH_HOSTS=()
 SSH_OPTS=()
 
-for i in $(seq 0 $((ssh_tunnel_count - 1))); do
+for ((i=0; i<ssh_tunnel_count; i++)); do
     name=$(jq -r ".ssh_tunnels[$i].name // empty" "$CONFIG_FILE")
     label=$(jq -r ".ssh_tunnels[$i].label // empty" "$CONFIG_FILE")
     forward=$(jq -r ".ssh_tunnels[$i].forward // empty" "$CONFIG_FILE")