diff --git a/Cargo.lock b/Cargo.lock
index 7ad30c0ba..ac3d8b51c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -567,9 +567,9 @@ dependencies = [
 
 [[package]]
 name = "brotli"
-version = "5.0.0"
+version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19483b140a7ac7174d34b5a581b406c64f84da5409d3e09cf4fff604f9270e67"
+checksum = "74f7971dbd9326d58187408ab83117d8ac1bb9c17b085fdacd1cf2f598719b6b"
 dependencies = [
  "alloc-no-stdlib",
  "alloc-stdlib",
diff --git a/Cargo.toml b/Cargo.toml
index eeb0e4fc9..3f04f575c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,7 +47,7 @@ async-smtp = { version = "0.9", default-features = false, features = ["runtime-t
 async_zip = { version = "0.0.12", default-features = false, features = ["deflate", "fs"] }
 backtrace = "0.3"
 base64 = "0.22"
-brotli = { version = "5", default-features=false, features = ["std"] }
+brotli = { version = "6", default-features=false, features = ["std"] }
 chrono = { workspace = true }
 email = { git = "https://github.com/deltachat/rust-email", branch = "master" }
 encoded-words = { git = "https://github.com/async-email/encoded-words", branch = "master" }