diff --git a/apps/system/components/kata-os-common/src/slot-allocator/Cargo.toml b/apps/system/components/kata-os-common/src/slot-allocator/Cargo.toml
index 8ee9b02..54a670d 100644
--- a/apps/system/components/kata-os-common/src/slot-allocator/Cargo.toml
+++ b/apps/system/components/kata-os-common/src/slot-allocator/Cargo.toml
@@ -9,7 +9,6 @@ default = []
 TRACE_OPS = []
 
 [dependencies]
-# TODO(sleffler): v1.0 requires rust edition2021
-bitvec = { version = "0.22", default-features = false, features = ["alloc"] }
+bitvec = { version = "1.0", default-features = false, features = ["alloc"] }
 log = "0.4"
 spin = "0.9"
diff --git a/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs b/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
index d751766..a12f289 100644
--- a/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
@@ -12,7 +12,7 @@ use log::trace;
 use spin::Mutex;
 
 struct Slots {
-    bits: Option<BitBox<Lsb0, u8>>,
+    bits: Option<BitBox<u8, Lsb0>>,
     used: usize,
     name: &'static str, // Component name
     // TODO(sleffler): maybe track last alloc for O(1) sequential allocations
@@ -20,7 +20,7 @@ struct Slots {
 impl Slots {
     fn new(name: &'static str, size: usize) -> Self {
         Slots {
-            bits: Some(bitvec![Lsb0, u8; 0; size].into_boxed_bitslice()),
+            bits: Some(bitvec![u8, Lsb0; 0; size].into_boxed_bitslice()),
             used: 0,
             name,
         }
@@ -33,7 +33,7 @@ impl Slots {
         }
     }
     fn init(&mut self, name: &'static str, size: usize) {
-        self.bits = Some(bitvec![Lsb0, u8; 0; size].into_boxed_bitslice());
+        self.bits = Some(bitvec![u8, Lsb0; 0; size].into_boxed_bitslice());
         self.name = name;
     }
     fn used_slots(&self) -> usize { self.used }
@@ -57,11 +57,11 @@ impl Slots {
         let bslice = &mut bits.as_mut_bitslice()[range];
         if value {
             assert!(bslice.not_any());
-            bslice.set_all(true);
+            bslice.fill(true);
             self.used = self.used + count;
         } else {
             assert!(bslice.all());
-            bslice.set_all(false);
+            bslice.fill(false);
             self.used = self.used - count;
         }
     }