diff --git a/VERSION b/VERSION
index 45a1b3f4..e25d8d9f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.1.2
+1.1.5
diff --git a/lib/supavisor/db_handler.ex b/lib/supavisor/db_handler.ex
index b7c17c99..f318e501 100644
--- a/lib/supavisor/db_handler.ex
+++ b/lib/supavisor/db_handler.ex
@@ -27,7 +27,8 @@ defmodule Supavisor.DbHandler do
   @impl true
   def init(args) do
     Process.flag(:trap_exit, true)
-    Logger.metadata(project: args.tenant, user: args.user, mode: args.mode)
+    {_, tenant} = args.tenant
+    Logger.metadata(project: tenant, user: args.user, mode: args.mode)
 
     data = %{
       id: args.id,
diff --git a/lib/supavisor/helpers.ex b/lib/supavisor/helpers.ex
index e33b556a..631ef775 100644
--- a/lib/supavisor/helpers.ex
+++ b/lib/supavisor/helpers.ex
@@ -1,7 +1,7 @@
 defmodule Supavisor.Helpers do
   @moduledoc false
 
-  @spec check_creds_get_ver(map) :: {:ok, String.t()} | {:error, String.t()}
+  @spec check_creds_get_ver(map) :: {:ok, String.t() | nil} | {:error, String.t()}
 
   def check_creds_get_ver(%{"require_user" => false} = params) do
     cond do
@@ -16,10 +16,12 @@ defmodule Supavisor.Helpers do
     end
   end
 
-  def check_creds_get_ver(params) do
+  def check_creds_get_ver(%{"users" => _} = params) do
     do_check_creds_get_ver(params)
   end
 
+  def check_creds_get_ver(_), do: {:ok, nil}
+
   def do_check_creds_get_ver(params) do
     Enum.reduce_while(params["users"], {nil, nil}, fn user, _ ->
       upstream_ssl? = !!params["upstream_ssl"]
diff --git a/lib/supavisor/tenant_supervisor.ex b/lib/supavisor/tenant_supervisor.ex
index 32fd2424..7a57cc2b 100644
--- a/lib/supavisor/tenant_supervisor.ex
+++ b/lib/supavisor/tenant_supervisor.ex
@@ -49,8 +49,11 @@ defmodule Supavisor.TenantSupervisor do
   defp pool_spec(id, args) do
     {size, overflow} =
       case args.mode do
-        :session -> {1, args.pool_size}
-        :transaction -> {args.pool_size, 0}
+        :session ->
+          {1, args.pool_size}
+
+        :transaction ->
+          if args.pool_size < 10, do: {args.pool_size, 0}, else: {10, args.pool_size - 10}
       end
 
     [
diff --git a/lib/supavisor_web/controllers/tenant_controller.ex b/lib/supavisor_web/controllers/tenant_controller.ex
index 88e93b7c..4acffdd0 100644
--- a/lib/supavisor_web/controllers/tenant_controller.ex
+++ b/lib/supavisor_web/controllers/tenant_controller.ex
@@ -128,9 +128,13 @@ defmodule SupavisorWeb.TenantController do
 
         {:ok, pg_version} ->
           params =
-            Map.put(params, "default_parameter_status", %{
-              "server_version" => pg_version
-            })
+            if pg_version do
+              Map.put(params, "default_parameter_status", %{
+                "server_version" => pg_version
+              })
+            else
+              params
+            end
 
           case Tenants.get_tenant_by_external_id(id) do
             nil ->
diff --git a/test/supavisor/db_handler_test.exs b/test/supavisor/db_handler_test.exs
index 12819cca..dc18ae2d 100644
--- a/test/supavisor/db_handler_test.exs
+++ b/test/supavisor/db_handler_test.exs
@@ -8,7 +8,7 @@ defmodule Supavisor.DbHandlerTest do
       args = %{
         id: {"a", "b"},
         auth: %{},
-        tenant: "test_tenant",
+        tenant: {:single, "test_tenant"},
         user_alias: "test_user_alias",
         user: "user",
         mode: :transaction,