diff --git a/Cargo.toml b/Cargo.toml
index 256fa2d..03c1582 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ fast-legacy-encode = ["fast-hangul-encode",
 
 [dependencies]
 cfg-if = "0.1.0"
-packed_simd = { version = "0.3.4", package = "packed_simd_2", optional = true }
+packed_simd = { version = "0.3.3", optional = true }
 serde = { version = "1.0", optional = true }
 
 [dev-dependencies]
diff --git a/README.md b/README.md
index 3665b8a..d6587d5 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@ There are currently these optional cargo features:
 
 ### `simd-accel`
 
-Enables SIMD acceleration using the nightly-dependent `packed_simd` crate.
+Enables SIMD acceleration using the nightly-dependent `packed_simd_2` crate.
 
 This is an opt-in feature, because enabling this feature _opts out_ of Rust's
 guarantees of future compilers compiling old code (aka. "stability story").
@@ -165,7 +165,7 @@ feature.
 _Note!_ If you are compiling for a target that does not have 128-bit SIMD
 enabled as part of the target definition and you are enabling 128-bit SIMD
 using `-C target_feature`, you need to enable the `core_arch` Cargo feature
-for `packed_simd` to compile a crates.io snapshot of `core_arch` instead of
+for `packed_simd_2` to compile a crates.io snapshot of `core_arch` instead of
 using the standard-library copy of `core::arch`, because the `core::arch`
 module of the pre-compiled standard library has been compiled with the
 assumption that the CPU doesn't have 128-bit SIMD. At present this applies
@@ -350,16 +350,15 @@ A framework for measuring performance is [available separately][2].
 ## Rust Version Compatibility
 
 It is a goal to support the latest stable Rust, the latest nightly Rust and
-the version of Rust that's used for Firefox Nightly (currently 1.29.0).
-These are tested on Travis.
+the version of Rust that's used for Firefox Nightly.
 
-Additionally, beta and the oldest known to work Rust version (currently
-1.29.0) are tested on Travis. The oldest Rust known to work is tested as
-a canary so that when the oldest known to work no longer works, the change
-can be documented here. At this time, there is no firm commitment to support
-a version older than what's required by Firefox. The oldest supported Rust
-is expected to move forward rapidly when `packed_simd` can replace the `simd`
-crate without performance regression.
+At this time, there is no firm commitment to support a version older than
+what's required by Firefox, and there is no commitment to treat MSRV changes
+as semver-breaking, because this crate depends on `cfg-if`, which doesn't
+appear to treat MSRV changes as semver-breaking, so it would be useless for
+this crate to treat MSRV changes as semver-breaking.
+
+As of 2020-11-02, MSRV appears to be Rust 1.31.0.
 
 ## Compatibility with rust-encoding
 
@@ -422,6 +421,11 @@ To regenerate the generated code:
 
 ## Release Notes
 
+### 0.8.25
+
+* Do pointer alignment checks in a way where intermediate steps aren't defined to be Undefined Behavior.
+* Update the `packed_simd` dependency to `packed_simd_2`.
+
 ### 0.8.24
 
 * Avoid computing an intermediate (not dereferenced) pointer value in a manner designated as Undefined Behavior when computing pointer alignment.