diff --git a/Cargo.toml b/Cargo.toml
index 2d905c03f0..1cb854792f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ build = "build.rs"
 name = "sentry-cli"
 version = "2.58.2"
 edition = "2021"
-rust-version = "1.86"
+rust-version = "1.91"
 
 [workspace]
 
diff --git a/Dockerfile b/Dockerfile
index fbcb32008c..06bcd64cd9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:1.87.0-alpine3.20@sha256:126df0f2a57e675f9306fe180b833982ffb996e90a92a793bb75253cfeed5475 AS sentry-build
+FROM rust:1.91.1-alpine3.20@sha256:79a1bf22657dda835c5e2cf08e3aba4099ed36af3f28167103feb688a3e2604b AS sentry-build
 
 # Install build dependencies
 RUN apk add musl-dev perl openssl-dev make
diff --git a/src/commands/dart_symbol_map/upload.rs b/src/commands/dart_symbol_map/upload.rs
index b224fee696..297a8db65e 100644
--- a/src/commands/dart_symbol_map/upload.rs
+++ b/src/commands/dart_symbol_map/upload.rs
@@ -90,7 +90,7 @@ pub(super) fn execute(args: DartSymbolMapUploadArgs) -> Result<()> {
                 serde_json::from_slice(mapping_file_bytes.as_ref())
                     .context("Invalid dartsymbolmap: expected a JSON array of strings")?;
 
-            if mapping_entries.len() % 2 != 0 {
+            if !mapping_entries.len().is_multiple_of(2) {
                 bail!(
                     "Invalid dartsymbolmap: expected an even number of entries, got {}",
                     mapping_entries.len()