diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 717a28fd7..c2a1ebfdf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
     name: Lint Rust
     runs-on: ubuntu-latest
     env:
-      RUSTUP_TOOLCHAIN: 1.80.1
+      RUSTUP_TOOLCHAIN: 1.81.0
     steps:
       - uses: actions/checkout@v4
         with:
@@ -95,11 +95,11 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            rust: 1.80.1
+            rust: 1.81.0
           - os: windows-latest
-            rust: 1.80.1
+            rust: 1.81.0
           - os: macos-latest
-            rust: 1.80.1
+            rust: 1.81.0
 
           # Minimum Supported Rust Version = 1.77.0
           - os: ubuntu-latest
diff --git a/scripts/coredeps/install-rust.sh b/scripts/coredeps/install-rust.sh
index 8ece61d70..8fbabea0c 100755
--- a/scripts/coredeps/install-rust.sh
+++ b/scripts/coredeps/install-rust.sh
@@ -7,7 +7,7 @@ set -euo pipefail
 #
 # Avoid using rustup here as it depends on reading /proc/self/exe and
 # has problems running under QEMU.
-RUST_VERSION=1.80.1
+RUST_VERSION=1.81.0
 
 ARCH="$(uname -m)"
 test -f "/lib/libc.musl-$ARCH.so.1" && LIBC=musl || LIBC=gnu
diff --git a/src/qr/dclogin_scheme.rs b/src/qr/dclogin_scheme.rs
index cb705ae18..c8cece55d 100644
--- a/src/qr/dclogin_scheme.rs
+++ b/src/qr/dclogin_scheme.rs
@@ -72,7 +72,7 @@ pub(super) fn decode_login(qr: &str) -> Result<Qr> {
         .unwrap_or(url_without_scheme);
 
     let addr = payload
-        .split(|c| c == '?' || c == '/')
+        .split(['?', '/'])
         .next()
         .context("invalid DCLOGIN payload E3")?;
 
diff --git a/src/tools.rs b/src/tools.rs
index 92b5deeda..d1ec13d6d 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -54,7 +54,7 @@ pub(crate) fn truncate(buf: &str, approx_chars: usize) -> Cow<str> {
             .map(|(n, _)| n)
             .unwrap_or_default();
 
-        if let Some(index) = buf[..end_pos].rfind(|c| c == ' ' || c == '\n') {
+        if let Some(index) = buf[..end_pos].rfind([' ', '\n']) {
             Cow::Owned(format!("{}{}", &buf[..=index], DC_ELLIPSIS))
         } else {
             Cow::Owned(format!("{}{}", &buf[..end_pos], DC_ELLIPSIS))
@@ -98,7 +98,7 @@ pub(crate) fn truncate_by_lines(
         // Text has too many lines and needs to be truncated.
         let text = {
             if let Some(buffer) = buf.get(..end_pos) {
-                if let Some(index) = buffer.rfind(|c| c == ' ' || c == '\n') {
+                if let Some(index) = buffer.rfind([' ', '\n']) {
                     buf.get(..=index)
                 } else {
                     buf.get(..end_pos)