diff --git a/README.md b/README.md
index 8c6c6db..b4494f0 100644
--- a/README.md
+++ b/README.md
@@ -131,7 +131,7 @@ The `valuable` feature enables the [`Valuable`](https://docs.rs/valuable/latest/
 
 ### Nightly features
 
-Activating the `nightly` feature will enable the `from_be_bytes`, `from_le_bytes`, `from_ne_bytes`, `to_be_bytes`, `to_le_bytes` and `to_ne_bytes` methods on `bnum`'s unsigned and signed integers and will make the `unchecked_...` methods `const`. This comes at the cost of only being able to compile on nightly. The nightly features that this uses are [`generic_const_exprs`](https://github.com/rust-lang/rust/issues/76560), [`const_trait_impl`](https://github.com/rust-lang/rust/issues/67792) and [`const_option_ext`](https://github.com/rust-lang/rust/issues/91930).
+Activating the `nightly` feature will enable the `from_be_bytes`, `from_le_bytes`, `from_ne_bytes`, `to_be_bytes`, `to_le_bytes` and `to_ne_bytes` methods on `bnum`'s unsigned and signed integers and will make the `unchecked_...` methods `const`. This comes at the cost of only being able to compile on nightly. The nightly features that this uses are [`generic_const_exprs`](https://github.com/rust-lang/rust/issues/76560), [`const_trait_impl`](https://github.com/rust-lang/rust/issues/67792), [`effects`](https://github.com/rust-lang/rust/issues/102090) and [`const_option_ext`](https://github.com/rust-lang/rust/issues/91930).
 
 ## Testing
 
diff --git a/src/int/ops.rs b/src/int/ops.rs
index 799ff8c..7e3856a 100644
--- a/src/int/ops.rs
+++ b/src/int/ops.rs
@@ -200,37 +200,10 @@ macro_rules! all_shift_impls {
             i128
         );
 
-        #[cfg(feature = "usize_exptype")]
-        crate::int::ops::try_shift_impl!(
-            $Struct, $BUint, $BInt;
-            Shl,
-            shl,
-            ShlAssign,
-            shl_assign,
-            "attempt to shift left with overflow",
-            u32,
-            u64,
-            u128
-        );
-
-        #[cfg(feature = "usize_exptype")]
-        crate::int::ops::try_shift_impl!(
-            $Struct, $BUint, $BInt;
-            Shr,
-            shr,
-            ShrAssign,
-            shr_assign,
-            "attempt to shift right with overflow",
-            u32,
-            u64,
-            u128
-        );
-
         crate::int::ops::shift_impl!($Struct, Shl, shl, ShlAssign, shl_assign, u8, u16);
 
         crate::int::ops::shift_impl!($Struct, Shr, shr, ShrAssign, shr_assign, u8, u16);
 
-        #[cfg(not(feature = "usize_exptype"))]
         crate::int::ops::try_shift_impl!(
             $Struct, $BUint, $BInt;
             Shl,
@@ -243,7 +216,6 @@ macro_rules! all_shift_impls {
             u128
         );
 
-        #[cfg(not(feature = "usize_exptype"))]
         crate::int::ops::try_shift_impl!(
             $Struct, $BUint, $BInt;
             Shr,
diff --git a/src/lib.rs b/src/lib.rs
index 3e48a9b..ece7ea5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,7 +4,8 @@
     feature(
         generic_const_exprs,
         const_trait_impl,
-        const_option_ext
+        const_option_ext,
+        effects,
     )
 )]
 #![cfg_attr(
@@ -15,7 +16,6 @@
         float_minimum_maximum,
         wrapping_next_power_of_two,
         float_next_up_down,
-        unchecked_math,
         unchecked_shifts,
     )
 )]