diff --git a/lib/ecto/dev_logger/printable_parameter.ex b/lib/ecto/dev_logger/printable_parameter.ex
index 728f685..a80bf02 100644
--- a/lib/ecto/dev_logger/printable_parameter.ex
+++ b/lib/ecto/dev_logger/printable_parameter.ex
@@ -71,7 +71,7 @@ defimpl Ecto.DevLogger.PrintableParameter, for: Atom do
 end
 
 defimpl Ecto.DevLogger.PrintableParameter, for: Map do
-  def to_expression(map), do: to_string_literal(map)
+  def to_expression(map), do: map |> to_string_literal() |> Ecto.DevLogger.Utils.in_string_quotes()
   def to_string_literal(map), do: Jason.encode!(map)
 end
 
diff --git a/mix.exs b/mix.exs
index 6486131..5cedac9 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,6 +1,6 @@
 defmodule Ecto.DevLogger.MixProject do
   use Mix.Project
-  @version "0.7.1"
+  @version "0.7.2"
   @source_url "https://github.com/fuelen/ecto_dev_logger"
 
   def project do
diff --git a/test/ecto/dev_logger/printable_parameter_test.exs b/test/ecto/dev_logger/printable_parameter_test.exs
index ee3177d..5b629ba 100644
--- a/test/ecto/dev_logger/printable_parameter_test.exs
+++ b/test/ecto/dev_logger/printable_parameter_test.exs
@@ -1,5 +1,5 @@
 defmodule Ecto.DevLogger.PrintableParameterTest do
-  use ExUnit.Case
+  use ExUnit.Case, async: true
   doctest Ecto.DevLogger.PrintableParameter
   import Ecto.DevLogger.PrintableParameter
 
@@ -42,7 +42,7 @@ defmodule Ecto.DevLogger.PrintableParameterTest do
              "boolean" => true,
              "integer" => 1,
              "array" => [1, 2, 3]
-           }) == ~s|{"array":[1,2,3],"boolean":true,"integer":1,"string":"string"}|
+           }) == ~s|'{"array":[1,2,3],"boolean":true,"integer":1,"string":"string"}'|
 
     # UUID-like binary
     assert to_expression(