diff --git a/Cargo.lock b/Cargo.lock
index 0bf9b20..b2589a7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -39,7 +39,7 @@ dependencies = [
  "bootloader 0.8.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "cache_utils 0.1.0",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "linked_list_allocator 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "linked_list_allocator 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polling_serial 0.1.0",
  "vga_buffer 0.1.0",
  "volatile 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -56,10 +56,18 @@ dependencies = [
 
 [[package]]
 name = "linked_list_allocator"
-version = "0.6.6"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spinning_top 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "lock_api"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -71,11 +79,24 @@ dependencies = [
  "x86_64 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "spin"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "spinning_top"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lock_api 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "vga_buffer"
 version = "0.1.0"
@@ -105,7 +126,10 @@ dependencies = [
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum bootloader 0.8.6 (registry+https://github.com/rust-lang/crates.io-index)" = "37b4577f46430d7dd1f16fa13a3aab5e3b57fe9ce7ff4378aa6b184e268eb60e"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum linked_list_allocator 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)" = "47de1a43fad0250ee197e9e124e5b5deab3d7b39d4428ae8a6d741ceb340c362"
+"checksum linked_list_allocator 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "411991593f041990abf72f6715903fe67770e710e3c95a6d2e98a7550270136a"
+"checksum lock_api 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "79b2de95ecb4691949fea4716ca53cdbcfccb2c612e19644a8bad05edcf9f47b"
+"checksum scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 "checksum spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+"checksum spinning_top 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32d801a3a53bcf5071f85fef8d5cab9e5f638fc5580a37e6eb7aba4b37438d24"
 "checksum volatile 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "6af0edf5b4faacc31fc51159244d78d65ec580f021afcef7bd53c04aeabc7f29"
 "checksum x86_64 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7467ff985c75f098f9897ea693141dbb25c8a5ceaf91e4a28ab705765932efb6"
diff --git a/Cargo.toml b/Cargo.toml
index 8217ce4..4541fe7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,15 +28,15 @@ x86_64 = "0.9.2"
 vga_buffer = { path = "vga_buffer" }
 polling_serial = { path = "polling_serial" }
 volatile = "0.2.6"
-linked_list_allocator = "0.6.4"
+linked_list_allocator = "0.7.0"
 cache_utils = { path = "cache_utils" }
 
 [dependencies.lazy_static]
-version = "1.0"
+version = "1.4.0"
 features = ["spin_no_std"]
 
 [dependencies.bootloader]
-version = "^0.8.2"
+version = "0.8.6"
 features = ["sse", "map_physical_memory"]
 
 #[patch.crates-io]
diff --git a/cache_utils/src/calibration.rs b/cache_utils/src/calibration.rs
index cc97a59..a5cc81a 100644
--- a/cache_utils/src/calibration.rs
+++ b/cache_utils/src/calibration.rs
@@ -1,5 +1,5 @@
-use crate::{flush, maccess, rdtsc_fence, rdtsc_nofence};
-use polling_serial::{serial_print, serial_println};
+use crate::{flush, maccess, rdtsc_fence};
+use polling_serial::serial_println;
 use vga_buffer::println;
 
 extern crate alloc;
diff --git a/src/allocator.rs b/src/allocator.rs
index ba46e25..81d58e3 100644
--- a/src/allocator.rs
+++ b/src/allocator.rs
@@ -1,4 +1,3 @@
-use polling_serial::serial_println;
 use x86_64::{
     structures::paging::{
         mapper::MapToError, FrameAllocator, Mapper, Page, PageTableFlags, Size4KiB,
@@ -21,7 +20,7 @@ pub fn init_heap(
         Page::range_inclusive(heap_start_page, heap_end_page)
     };
 
-    for (i, page) in page_range.enumerate() {
+    for page in page_range {
         let frame = frame_allocator
             .allocate_frame()
             .ok_or(MapToError::FrameAllocationFailed)?;
diff --git a/src/main.rs b/src/main.rs
index dd9cf19..9667a70 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,7 +12,6 @@ use bootloader::{entry_point, BootInfo};
 use cache_utils;
 use core::panic::PanicInfo;
 use dendrobates_tinctoreus_azureus::allocator;
-use polling_serial::serial_print;
 use polling_serial::serial_println;
 use vga_buffer; // required for custom panic handler
 use vga_buffer::{print, println};
diff --git a/src/memory.rs b/src/memory.rs
index 24022c9..ce98eb5 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -49,8 +49,7 @@ pub fn create_example_mapping(
     let not_really_unused_frame = unsafe { UnusedPhysFrame::new(frame) };
     let flags = Flags::PRESENT | Flags::WRITABLE;
 
-    let map_to_result =
-        unsafe { mapper.map_to(page, not_really_unused_frame, flags, frame_allocator) };
+    let map_to_result = mapper.map_to(page, not_really_unused_frame, flags, frame_allocator);
     map_to_result.expect("map_to failed").flush();
 }