diff --git a/lib/towerops/api_tokens.ex b/lib/towerops/api_tokens.ex
index c4fe7182..6ade21b7 100644
--- a/lib/towerops/api_tokens.ex
+++ b/lib/towerops/api_tokens.ex
@@ -176,7 +176,7 @@ defmodule Towerops.ApiTokens do
     # We don't care if this fails
     Task.start(fn ->
       token
-      |> Ecto.Changeset.change(last_used_at: DateTime.utc_now())
+      |> Ecto.Changeset.change(last_used_at: DateTime.truncate(DateTime.utc_now(), :second))
       |> Repo.update()
     end)
   end
diff --git a/lib/towerops/device_profiles/importer.ex b/lib/towerops/device_profiles/importer.ex
index 14e85ee9..523d0e53 100644
--- a/lib/towerops/device_profiles/importer.ex
+++ b/lib/towerops/device_profiles/importer.ex
@@ -377,7 +377,14 @@ defmodule Towerops.DeviceProfiles.Importer do
   defp parse_float(nil), do: nil
   defp parse_float(value) when is_float(value), do: value
   defp parse_float(value) when is_integer(value), do: value * 1.0
-  defp parse_float(value) when is_binary(value), do: String.to_float(value)
+
+  defp parse_float(value) when is_binary(value) do
+    case Float.parse(value) do
+      {float, _remainder} -> float
+      :error -> nil
+    end
+  end
+
   defp parse_float(_), do: nil
 
   defp extract_sensor_options(sensor) do