diff --git a/apps/astarte_realm_management/lib/astarte_realm_management/engine.ex b/apps/astarte_realm_management/lib/astarte_realm_management/engine.ex
index 5b0685bf5..06c9c7db0 100644
--- a/apps/astarte_realm_management/lib/astarte_realm_management/engine.ex
+++ b/apps/astarte_realm_management/lib/astarte_realm_management/engine.ex
@@ -95,9 +95,9 @@ defmodule Astarte.RealmManagement.Engine do
         Queries.install_new_interface(client, interface_doc, automaton)
       end
     else
-      {:error, {:invalid, _invalid_str, _invalid_pos}} ->
+      {:error, %Jason.DecodeError{} = jason_error_interface} ->
         _ =
-          Logger.warning("Received invalid interface JSON: #{inspect(interface_json)}.",
+          Logger.warning("Received invalid interface JSON: #{inspect(jason_error_interface)}.",
             tag: "invalid_json"
           )
 
@@ -177,9 +177,9 @@ defmodule Astarte.RealmManagement.Engine do
         )
       end
     else
-      {:error, {:invalid, _invalid_str, _invalid_pos}} ->
+      {:error, %Jason.DecodeError{} = jason_error_interface} ->
         _ =
-          Logger.warning("Received invalid interface JSON: #{inspect(interface_json)}.",
+          Logger.warning("Received invalid interface JSON: #{inspect(jason_error_interface)}.",
             tag: "invalid_json"
           )
 
@@ -885,7 +885,7 @@ defmodule Astarte.RealmManagement.Engine do
   end
 
   defp decode_policy(policy_json) do
-    with {:error, {:invalid, _invalid_str, _invalid_pos}} <- Jason.decode(policy_json) do
+    with {:error, %Jason.DecodeError{}} <- Jason.decode(policy_json) do
       _ =
         Logger.warning("Received invalid trigger policy JSON: #{inspect(policy_json)}.",
           tag: "invalid_trigger_policy_json"