diff --git a/hammond-downloader/src/lib.rs b/hammond-downloader/src/lib.rs
index 7ac819a..a1a7ee8 100644
--- a/hammond-downloader/src/lib.rs
+++ b/hammond-downloader/src/lib.rs
@@ -1,7 +1,15 @@
 #![recursion_limit = "1024"]
-#![warn(unused_extern_crates, unused)]
 #![allow(unknown_lints)]
 #![cfg_attr(feature = "cargo-clippy", allow(blacklisted_name, option_map_unit_fn))]
+// Enable lint group collections
+#![warn(nonstandard_style, edition_2018, rust_2018_idioms, bad_style, unused)]
+// standalone lints
+#![warn(
+    const_err, improper_ctypes, non_shorthand_field_patterns, no_mangle_generic_items,
+    overflowing_literals, plugin_as_library, private_no_mangle_fns, private_no_mangle_statics,
+    unconditional_recursion, unions_with_drop_fields, while_true, missing_debug_implementations,
+    trivial_casts, trivial_numeric_casts, elided_lifetime_in_paths, missing_copy_implementations
+)]
 #![deny(warnings)]
 
 extern crate failure;
diff --git a/hammond-gtk/src/main.rs b/hammond-gtk/src/main.rs
index 9322f42..b317e25 100644
--- a/hammond-gtk/src/main.rs
+++ b/hammond-gtk/src/main.rs
@@ -3,7 +3,15 @@
     allow(clone_on_ref_ptr, blacklisted_name, match_same_arms, option_map_unit_fn)
 )]
 #![allow(unknown_lints)]
-#![warn(unused_extern_crates, unused)]
+// Enable lint group collections
+#![warn(nonstandard_style, edition_2018, rust_2018_idioms, bad_style, unused)]
+// standalone lints
+#![warn(
+    const_err, improper_ctypes, non_shorthand_field_patterns, no_mangle_generic_items,
+    overflowing_literals, plugin_as_library, private_no_mangle_fns, private_no_mangle_statics,
+    unconditional_recursion, unions_with_drop_fields, while_true, missing_debug_implementations,
+    trivial_casts, trivial_numeric_casts, elided_lifetime_in_paths, missing_copy_implementations
+)]
 #![deny(warnings)]
 
 extern crate gdk;
diff --git a/hammond-gtk/src/widgets/player.rs b/hammond-gtk/src/widgets/player.rs
index 4ec2362..427047b 100644
--- a/hammond-gtk/src/widgets/player.rs
+++ b/hammond-gtk/src/widgets/player.rs
@@ -355,7 +355,7 @@ impl PlayerWidget {
     fn connect_update_slider(slider: &gtk::Scale, player: &gst_player::Player) -> SignalHandlerId {
         slider.connect_value_changed(clone!(player => move |slider| {
             let value = slider.get_value() as u64;
-            player.seek(ClockTime::from_seconds(value as u64));
+            player.seek(ClockTime::from_seconds(value));
         }))
     }
 }