diff --git a/.github/workflows/lints.yml b/.github/workflows/lints.yml
index bcb957bc6..fff353dcf 100644
--- a/.github/workflows/lints.yml
+++ b/.github/workflows/lints.yml
@@ -75,19 +75,19 @@ jobs:
         if: always()
 
   rust-clippy:
-    name: Clippy (1.64.0)
+    name: Clippy (1.67.1)
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.64.0
+          toolchain: 1.67.1
           components: clippy
           override: true
       - name: Run clippy
         uses: actions-rs/clippy-check@v1
         with:
-          name: Clippy (1.64.0)
+          name: Clippy (1.67.1)
           token: ${{ secrets.GITHUB_TOKEN }}
           args: --all-features --all-targets -- -D warnings
 
@@ -98,7 +98,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.64.0
+          toolchain: 1.67.1
           override: true
       - run: rustup component add rustfmt
       - uses: actions-rs/cargo@v1
diff --git a/Cargo.toml b/Cargo.toml
index 9f201bd20..bb3dc9733 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ repository = "https://github.com/zcash/zcash"
 readme = "README.md"
 license = "MIT OR Apache-2.0"
 edition = "2018"
-rust-version = "1.64"
+rust-version = "1.67.1"
 
 [package.metadata.vet]
 store = { path = "./qa/supply-chain" }
diff --git a/contrib/devtools/update-clang-hashes.sh b/contrib/devtools/update-clang-hashes.sh
index 0e64360bb..cf682392f 100755
--- a/contrib/devtools/update-clang-hashes.sh
+++ b/contrib/devtools/update-clang-hashes.sh
@@ -45,4 +45,3 @@ update_clang_hash amd64-unknown-freebsd12 freebsd
 # For Windows cross-compilation
 # update_libcxx_msys2_hash LIBCXX_LIBRARY MAKEFILE_HASH_SUFFIX
 update_libcxx_msys2_hash libc++ sha256_hash
-update_libcxx_msys2_hash libc++abi libcxxabi_sha256_hash
diff --git a/depends/Makefile b/depends/Makefile
index 85401b502..280581671 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -107,7 +107,7 @@ wallet_packages_$(NO_WALLET) = $(wallet_packages)
 
 packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(wallet_packages_)
 native_packages += $($(host_arch)_$(host_os)_native_packages) $($(host_os)_native_packages)
-all_packages = $(packages) $(native_packages)
+all_packages = $(native_packages) $(packages)
 
 meta_depends = Makefile funcs.mk builders/default.mk hosts/default.mk hosts/$(host_os).mk builders/$(build_os).mk
 
diff --git a/depends/packages/libcxx.mk b/depends/packages/libcxx.mk
index 0ee3c2aea..fcda4be5c 100644
--- a/depends/packages/libcxx.mk
+++ b/depends/packages/libcxx.mk
@@ -1,6 +1,6 @@
 package=libcxx
 $(package)_version=$(native_clang_version)
-$(package)_msys2_version=14.0.6-1
+$(package)_msys2_version=15.0.7-3
 
 ifneq ($(canonical_host),$(build))
 ifneq ($(host_os),mingw32)
@@ -9,10 +9,10 @@ ifneq ($(host_os),mingw32)
 $(package)_download_path=$(native_clang_download_path)
 $(package)_download_file_aarch64_linux=clang+llvm-$($(package)_version)-aarch64-linux-gnu.tar.xz
 $(package)_file_name_aarch64_linux=clang-llvm-$($(package)_version)-aarch64-linux-gnu.tar.xz
-$(package)_sha256_hash_aarch64_linux=1a81fda984f5e607584916fdf69cf41e5385b219b983544d2c1a14950d5a65cf
+$(package)_sha256_hash_aarch64_linux=8ca4d68cf103da8331ca3f35fe23d940c1b78fb7f0d4763c1c059e352f5d1bec
 $(package)_download_file_linux=clang+llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-18.04.tar.xz
 $(package)_file_name_linux=clang-llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-18.04.tar.xz
-$(package)_sha256_hash_linux=61582215dafafb7b576ea30cc136be92c877ba1f1c31ddbbd372d6d65622fef5
+$(package)_sha256_hash_linux=38bc7f5563642e73e69ac5626724e206d6d539fbef653541b34cae0ba9c3f036
 
 # Starting from LLVM 14.0.0, some Clang binary tarballs store libc++ in a
 # target-specific subdirectory.
@@ -26,37 +26,17 @@ endef
 
 else
 # For Windows cross-compilation, use the MSYS2 binaries.
+# Starting from LLVM 15.0.0, libc++abi is provided by libc++.
 $(package)_download_path=https://repo.msys2.org/mingw/x86_64
 $(package)_download_file=mingw-w64-x86_64-libc++-$($(package)_msys2_version)-any.pkg.tar.zst
 $(package)_file_name=mingw-w64-x86_64-libcxx-$($(package)_msys2_version)-any.pkg.tar.zst
-$(package)_sha256_hash=05f888ec1d82cb989a22ced6b85834c5d9aac46613b15334e6a2806c3d0960a4
-
-$(package)_libcxxabi_download_file=mingw-w64-x86_64-libc++abi-$($(package)_msys2_version)-any.pkg.tar.zst
-$(package)_libcxxabi_file_name=mingw-w64-x86_64-libcxxabi-$($(package)_msys2_version)-any.pkg.tar.zst
-$(package)_libcxxabi_sha256_hash=0ca22d18cb155f6d230d7f6691c05b876316e0c381195428f063f66352689ca4
-
-$(package)_extra_sources += $($(package)_libcxxabi_file_name)
-
-define $(package)_fetch_cmds
-$(call fetch_file,$(package),$($(package)_download_path),$($(package)_download_file),$($(package)_file_name),$($(package)_sha256_hash)) && \
-$(call fetch_file,$(package),$($(package)_download_path),$($(package)_libcxxabi_download_file),$($(package)_libcxxabi_file_name),$($(package)_libcxxabi_sha256_hash))
-endef
-
-define $(package)_extract_cmds
-  mkdir -p $($(package)_extract_dir) && \
-  echo "$($(package)_sha256_hash)  $($(package)_source)" > $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  echo "$($(package)_libcxxabi_sha256_hash)  $($(package)_source_dir)/$($(package)_libcxxabi_file_name)" >> $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  $(build_SHA256SUM) -c $($(package)_extract_dir)/.$($(package)_file_name).hash && \
-  mkdir -p libcxxabi && \
-  tar --no-same-owner --strip-components=1 -C libcxxabi -xf $($(package)_source_dir)/$($(package)_libcxxabi_file_name) && \
-  tar --no-same-owner --strip-components=1 -xf $($(package)_source)
-endef
+$(package)_sha256_hash=8c14da21fa9622cc7450b22467452c6c933a03cee526cf8744faea3d4674035b
 
 define $(package)_stage_cmds
   mkdir -p $($(package)_staging_prefix_dir)/lib && \
   mv include/ $($(package)_staging_prefix_dir) && \
   cp lib/libc++.a $($(package)_staging_prefix_dir)/lib && \
-  cp libcxxabi/lib/libc++abi.a $($(package)_staging_prefix_dir)/lib
+  cp lib/libc++abi.a $($(package)_staging_prefix_dir)/lib
 endef
 endif
 
diff --git a/depends/packages/native_clang.mk b/depends/packages/native_clang.mk
index c431bf520..7d3f7708f 100644
--- a/depends/packages/native_clang.mk
+++ b/depends/packages/native_clang.mk
@@ -5,25 +5,27 @@ package=native_clang
 # - Manually fix the versions for packages that don't exist (the LLVM project
 #   doesn't uniformly cut binaries across releases).
 # The Clang compiler should use the same LLVM version as the Rust compiler.
-$(package)_major_version=14
-$(package)_version=14.0.6
-$(package)_download_path=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
-$(package)_download_path_linux=https://github.com/llvm/llvm-project/releases/download/llvmorg-14.0.0
-$(package)_download_file_linux=clang+llvm-14.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz
+$(package)_major_version=15
+$(package)_version=15.0.6
+$(package)_download_path_linux=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
+$(package)_download_file_linux=clang+llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-18.04.tar.xz
 $(package)_file_name_linux=clang-llvm-$($(package)_version)-x86_64-linux-gnu-ubuntu-18.04.tar.xz
-$(package)_sha256_hash_linux=61582215dafafb7b576ea30cc136be92c877ba1f1c31ddbbd372d6d65622fef5
-$(package)_download_path_darwin=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
-$(package)_download_file_darwin=clang+llvm-$($(package)_version)-x86_64-apple-darwin.tar.xz
-$(package)_file_name_darwin=clang-llvm-$($(package)_version)-x86_64-apple-darwin.tar.xz
-$(package)_sha256_hash_darwin=e6cc6b8279661fd4452c2847cb8e55ce1e54e1faf4ab497b37c85ffdb6685e7c
-$(package)_download_path_freebsd=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
-$(package)_download_file_freebsd=clang+llvm-$($(package)_version)-amd64-unknown-freebsd12.tar.xz
-$(package)_file_name_freebsd=clang-llvm-$($(package)_version)-amd64-unknown-freebsd12.tar.xz
+$(package)_sha256_hash_linux=38bc7f5563642e73e69ac5626724e206d6d539fbef653541b34cae0ba9c3f036
+$(package)_download_path_darwin=https://github.com/llvm/llvm-project/releases/download/llvmorg-15.0.4
+$(package)_download_file_darwin=clang+llvm-15.0.4-x86_64-apple-darwin.tar.xz
+$(package)_file_name_darwin=clang-llvm-15.0.4-x86_64-apple-darwin.tar.xz
+$(package)_sha256_hash_darwin=4c98d891c07c8f6661b233bf6652981f28432cfdbd6f07181114195c3536544b
+# 2023-02-16: No FreeBSD packages are available for Clang 15, so we use Clang 14
+# here. This means FreeBSD builds will use two different versions of LLVM, but
+# FreeBSD is only a Tier 3 platform, so that is acceptable.
+$(package)_download_path_freebsd=https://github.com/llvm/llvm-project/releases/download/llvmorg-14.0.6
+$(package)_download_file_freebsd=clang+llvm-14.0.6-amd64-unknown-freebsd12.tar.xz
+$(package)_file_name_freebsd=clang-llvm-14.0.6-amd64-unknown-freebsd12.tar.xz
 $(package)_sha256_hash_freebsd=b0a7b86dacb12afb8dd2ca99ea1b894d9cce84aab7711cb1964b3005dfb09af3
 $(package)_download_path_aarch64_linux=https://github.com/llvm/llvm-project/releases/download/llvmorg-$($(package)_version)
 $(package)_download_file_aarch64_linux=clang+llvm-$($(package)_version)-aarch64-linux-gnu.tar.xz
 $(package)_file_name_aarch64_linux=clang-llvm-$($(package)_version)-aarch64-linux-gnu.tar.xz
-$(package)_sha256_hash_aarch64_linux=1a81fda984f5e607584916fdf69cf41e5385b219b983544d2c1a14950d5a65cf
+$(package)_sha256_hash_aarch64_linux=8ca4d68cf103da8331ca3f35fe23d940c1b78fb7f0d4763c1c059e352f5d1bec
 
 ifneq (,$(wildcard /etc/arch-release))
 $(package)_dependencies=native_libtinfo
diff --git a/depends/packages/native_rust.mk b/depends/packages/native_rust.mk
index 93b4e9f86..33d1f6969 100644
--- a/depends/packages/native_rust.mk
+++ b/depends/packages/native_rust.mk
@@ -3,16 +3,16 @@ package=native_rust
 # ./contrib/devtools/update-rust-hashes.sh
 # The Rust compiler should use the same LLVM version as the Clang compiler; you
 # can check this with `rustc --version -v`.
-$(package)_version=1.64.0
+$(package)_version=1.67.1
 $(package)_download_path=https://static.rust-lang.org/dist
 $(package)_file_name_linux=rust-$($(package)_version)-x86_64-unknown-linux-gnu.tar.gz
-$(package)_sha256_hash_linux=a893977f238291370ab96726a74b6b9ae854dc75fbf5730954d901a93843bf9b
+$(package)_sha256_hash_linux=652a8966436c4e97b127721d9130810e1cdc8dfdf526fad68c9c1f6281bd02a3
 $(package)_file_name_darwin=rust-$($(package)_version)-x86_64-apple-darwin.tar.gz
-$(package)_sha256_hash_darwin=b6003d49fb857ff8dc105a3ccba98b851cd3e7d874005acb92284fd1113adc0d
+$(package)_sha256_hash_darwin=020702c9564f53e18ac880db77c2f6b660a24ea372e4fda3f0c1ef2f8b9c74b9
 $(package)_file_name_freebsd=rust-$($(package)_version)-x86_64-unknown-freebsd.tar.gz
-$(package)_sha256_hash_freebsd=f188a9a7f947d559add5aa7b5aa218d9c5177237eb9ea62109347f0f1464e3a2
+$(package)_sha256_hash_freebsd=d0ba56d6601542ae19af47b63671d7b0f516b429202c32339841ae60d33bd73a
 $(package)_file_name_aarch64_linux=rust-$($(package)_version)-aarch64-unknown-linux-gnu.tar.gz
-$(package)_sha256_hash_aarch64_linux=7d8860572431bd4ee1b9cd0cd77cf7ff29fdd5b91ed7c92a820f872de6ced558
+$(package)_sha256_hash_aarch64_linux=8edee248eed4b17c09b3d7b0096944b7e5992dd1119a28429c0b6b4d39a9613c
 
 # Mapping from GCC canonical hosts to Rust targets
 # If a mapping is not present, we assume they are identical, unless $host_os is
@@ -21,15 +21,20 @@ $(package)_rust_target_x86_64-pc-linux-gnu=x86_64-unknown-linux-gnu
 $(package)_rust_target_x86_64-w64-mingw32=x86_64-pc-windows-gnu
 
 # Mapping from Rust targets to SHA-256 hashes
-$(package)_rust_std_sha256_hash_aarch64-unknown-linux-gnu=2b425658f84793d5bbf00ce545f410ec6454add202cce27a718d81e0233e7007
-$(package)_rust_std_sha256_hash_x86_64-apple-darwin=eb2f7c51f63973765f01efe509ccd2f26345d4bf0d77695adb4198a0899ae648
-$(package)_rust_std_sha256_hash_x86_64-pc-windows-gnu=dcf87f97432adf7228e907b551d9b73f1ab16f79dc5da0724a227b7ffdaf57b4
-$(package)_rust_std_sha256_hash_x86_64-unknown-freebsd=c91edba781ba56f35f2dba56a268d41866ea9bb5f6ffb9d342635f66b836898b
+$(package)_rust_std_sha256_hash_aarch64-unknown-linux-gnu=19f3afbe43c7e041b8b5c0143101d3ede92f73f720709ef1578ad5d259ad6181
+$(package)_rust_std_sha256_hash_x86_64-apple-darwin=0d1e93cada608ee1b4474af417dea2ac06590ba4cc963a9b9f5c7164ddf42b87
+$(package)_rust_std_sha256_hash_x86_64-pc-windows-gnu=5088bfaf1d4b316e71655fcefb084cfa07876bd2ce832eb1e4b705ff27b3ad8a
+$(package)_rust_std_sha256_hash_x86_64-unknown-freebsd=aa6ac1844b06143a7533e44d129083d2c28a1d34953dc432c8c3591886cc892c
 
 define rust_target
 $(if $($(1)_rust_target_$(2)),$($(1)_rust_target_$(2)),$(if $(findstring darwin,$(3)),x86_64-apple-darwin,$(if $(findstring freebsd,$(3)),x86_64-unknown-freebsd,$(2))))
 endef
 
+define $(package)_set_vars
+$(package)_stage_opts=--disable-ldconfig
+$(package)_stage_build_opts=--without=rust-docs-json-preview,rust-docs
+endef
+
 ifneq ($(canonical_host),$(build))
 $(package)_rust_target=$(call rust_target,$(package),$(canonical_host),$(host_os))
 $(package)_exact_file_name=rust-std-$($(package)_version)-$($(package)_rust_target).tar.gz
@@ -54,12 +59,12 @@ define $(package)_extract_cmds
 endef
 
 define $(package)_stage_cmds
-  bash ./install.sh --without=rust-docs --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) --disable-ldconfig && \
-  ../$(canonical_host)/install.sh --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) --disable-ldconfig
+  bash ./install.sh --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) $($(package)_stage_opts) $($(package)_stage_build_opts) && \
+  ../$(canonical_host)/install.sh --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) $($(package)_stage_opts)
 endef
 else
 
 define $(package)_stage_cmds
-  bash ./install.sh --without=rust-docs --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) --disable-ldconfig
+  bash ./install.sh --destdir=$($(package)_staging_dir) --prefix=$(build_prefix) $($(package)_stage_opts) $($(package)_stage_build_opts)
 endef
 endif
diff --git a/qa/zcash/postponed-updates.txt b/qa/zcash/postponed-updates.txt
index 0f30ac5e5..735fe58b3 100644
--- a/qa/zcash/postponed-updates.txt
+++ b/qa/zcash/postponed-updates.txt
@@ -29,28 +29,9 @@ native_ccache 4.7.2 2023-03-01
 native_ccache 4.7.3 2023-03-01
 native_ccache 4.7.4 2023-03-01
 
-# Clang and Rust are currently pinned to LLVM 14
-libcxx 15.0.0 2023-03-01
-libcxx 15.0.1 2023-03-01
-libcxx 15.0.2 2023-03-01
-libcxx 15.0.3 2023-03-01
-libcxx 15.0.4 2023-03-01
-libcxx 15.0.5 2023-03-01
-libcxx 15.0.6 2023-03-01
-libcxx 15.0.7 2023-03-01
-native_clang 15.0.0 2023-03-01
-native_clang 15.0.1 2023-03-01
-native_clang 15.0.2 2023-03-01
-native_clang 15.0.3 2023-03-01
-native_clang 15.0.4 2023-03-01
-native_clang 15.0.5 2023-03-01
-native_clang 15.0.6 2023-03-01
-native_clang 15.0.7 2023-03-01
-native_rust 1.65.0 2023-03-01
-native_rust 1.66.0 2023-03-01
-native_rust 1.66.1 2023-03-01
-native_rust 1.67.0 2023-03-01
-native_rust 1.67.1 2023-03-01
+# Clang and Rust are currently pinned to LLVM 15
+libcxx 15.0.7 2022-04-30
+native_clang 15.0.7 2022-04-30
 
 # We're never updating to this version
 bdb 18.1.40 2024-02-01
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 10add70bb..588ffd578 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.64.0"
+channel = "1.67.1"
diff --git a/src/rust/src/history_ffi.rs b/src/rust/src/history_ffi.rs
index f132de9d3..4271d708e 100644
--- a/src/rust/src/history_ffi.rs
+++ b/src/rust/src/history_ffi.rs
@@ -145,7 +145,7 @@ fn librustzcash_mmr_append_inner<V: Version>(
     unsafe {
         *rt_ret = V::hash(root_node.data());
 
-        for (idx, next_buf) in slice::from_raw_parts_mut(buf_ret, return_count as usize)
+        for (idx, next_buf) in slice::from_raw_parts_mut(buf_ret, return_count)
             .iter_mut()
             .enumerate()
         {
diff --git a/src/rust/src/incremental_merkle_tree.rs b/src/rust/src/incremental_merkle_tree.rs
index 0f51b9635..c7b228fd0 100644
--- a/src/rust/src/incremental_merkle_tree.rs
+++ b/src/rust/src/incremental_merkle_tree.rs
@@ -76,11 +76,11 @@ pub fn write_tree<H: Hashable + HashSer + Ord, W: Write>(
     tree: &BridgeTree<H, 32>,
 ) -> io::Result<()> {
     writer.write_u8(SER_V2)?;
-    Vector::write(&mut writer, tree.prior_bridges(), |mut w, b| {
-        write_bridge_v1(&mut w, b)
+    Vector::write(&mut writer, tree.prior_bridges(), |w, b| {
+        write_bridge_v1(w, b)
     })?;
-    Optional::write(&mut writer, tree.current_bridge().as_ref(), |mut w, b| {
-        write_bridge_v1(&mut w, b)
+    Optional::write(&mut writer, tree.current_bridge().as_ref(), |w, b| {
+        write_bridge_v1(w, b)
     })?;
     Vector::write_sized(
         &mut writer,
diff --git a/src/rust/src/metrics_ffi.rs b/src/rust/src/metrics_ffi.rs
index 8cf995eb7..35306ef9d 100644
--- a/src/rust/src/metrics_ffi.rs
+++ b/src/rust/src/metrics_ffi.rs
@@ -210,7 +210,7 @@ pub extern "C" fn metrics_increment_counter(key: *mut FfiKey, value: u64) {
 pub extern "C" fn metrics_static_update_gauge(callsite: *const FfiCallsite, value: c_double) {
     if let Some(recorder) = try_recorder() {
         let callsite = unsafe { callsite.as_ref().unwrap() };
-        recorder.register_gauge(&callsite.key).set(value as f64);
+        recorder.register_gauge(&callsite.key).set(value);
     }
 }
 
@@ -219,7 +219,7 @@ pub extern "C" fn metrics_update_gauge(key: *mut FfiKey, value: c_double) {
     if let Some(recorder) = try_recorder() {
         if !key.is_null() {
             let key = unsafe { Box::from_raw(key) };
-            recorder.register_gauge(&key.inner).set(value as f64);
+            recorder.register_gauge(&key.inner).set(value);
         }
     }
 }
@@ -228,9 +228,7 @@ pub extern "C" fn metrics_update_gauge(key: *mut FfiKey, value: c_double) {
 pub extern "C" fn metrics_static_increment_gauge(callsite: *const FfiCallsite, value: c_double) {
     if let Some(recorder) = try_recorder() {
         let callsite = unsafe { callsite.as_ref().unwrap() };
-        recorder
-            .register_gauge(&callsite.key)
-            .increment(value as f64);
+        recorder.register_gauge(&callsite.key).increment(value);
     }
 }
 
@@ -239,7 +237,7 @@ pub extern "C" fn metrics_increment_gauge(key: *mut FfiKey, value: c_double) {
     if let Some(recorder) = try_recorder() {
         if !key.is_null() {
             let key = unsafe { Box::from_raw(key) };
-            recorder.register_gauge(&key.inner).increment(value as f64);
+            recorder.register_gauge(&key.inner).increment(value);
         }
     }
 }
@@ -248,9 +246,7 @@ pub extern "C" fn metrics_increment_gauge(key: *mut FfiKey, value: c_double) {
 pub extern "C" fn metrics_static_decrement_gauge(callsite: *const FfiCallsite, value: c_double) {
     if let Some(recorder) = try_recorder() {
         let callsite = unsafe { callsite.as_ref().unwrap() };
-        recorder
-            .register_gauge(&callsite.key)
-            .decrement(value as f64);
+        recorder.register_gauge(&callsite.key).decrement(value);
     }
 }
 
@@ -259,7 +255,7 @@ pub extern "C" fn metrics_decrement_gauge(key: *mut FfiKey, value: c_double) {
     if let Some(recorder) = try_recorder() {
         if !key.is_null() {
             let key = unsafe { Box::from_raw(key) };
-            recorder.register_gauge(&key.inner).decrement(value as f64);
+            recorder.register_gauge(&key.inner).decrement(value);
         }
     }
 }
@@ -268,9 +264,7 @@ pub extern "C" fn metrics_decrement_gauge(key: *mut FfiKey, value: c_double) {
 pub extern "C" fn metrics_static_record_histogram(callsite: *const FfiCallsite, value: c_double) {
     if let Some(recorder) = try_recorder() {
         let callsite = unsafe { callsite.as_ref().unwrap() };
-        recorder
-            .register_histogram(&callsite.key)
-            .record(value as f64);
+        recorder.register_histogram(&callsite.key).record(value);
     }
 }
 
@@ -279,7 +273,7 @@ pub extern "C" fn metrics_record_histogram(key: *mut FfiKey, value: c_double) {
     if let Some(recorder) = try_recorder() {
         if !key.is_null() {
             let key = unsafe { Box::from_raw(key) };
-            recorder.register_histogram(&key.inner).record(value as f64);
+            recorder.register_histogram(&key.inner).record(value);
         }
     }
 }