diff --git a/Cargo.toml b/Cargo.toml
index e27228d..e39c287 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ edition = "2021"
 rust-version = "1.74"
 
 [dependencies]
-flate2 = { version = "1", optional = true }
+flate2 = { version = "1", optional = true, default-features = false }
 http = "1.1"
 httparse = "1.8"
 url = { version = "2.4", optional = true }
@@ -26,6 +26,7 @@ webpki-roots = { version = ">=0.26,<2.0", optional = true }
 
 [dev-dependencies]
 codspeed-criterion-compat = "3"
+flate2 = "*" # To enable the default backend
 
 [features]
 default = ["client", "server"]
diff --git a/deny.toml b/deny.toml
index b07db6f..7b22a5a 100644
--- a/deny.toml
+++ b/deny.toml
@@ -2,7 +2,6 @@
 allow = [
     "Apache-2.0",
     "MIT",
-    "Unicode-DFS-2016",
     "Unicode-3.0"
 ]