diff --git a/src/libdoh/Cargo.toml b/src/libdoh/Cargo.toml
index cd04489..83daff6 100644
--- a/src/libdoh/Cargo.toml
+++ b/src/libdoh/Cargo.toml
@@ -15,16 +15,16 @@ default = ["tls"]
 tls = ["tokio-rustls"]
 
 [dependencies]
-anyhow = "1.0.65"
+anyhow = "1.0.68"
 arc-swap = "1.5.1"
-base64 = "0.13.0"
+base64 = "0.20.0"
 byteorder = "1.4.3"
-bytes = "1.2.1"
-futures = "0.3.24"
-hyper = { version = "0.14.20", default-features = false, features = ["server", "http1", "http2", "stream"] }
+bytes = "1.3.0"
+futures = "0.3.25"
+hyper = { version = "0.14.23", default-features = false, features = ["server", "http1", "http2", "stream"] }
 odoh-rs = "1.0.0"
 rand = "0.8.5"
-tokio = { version = "1.21.2", features = ["net", "rt-multi-thread", "time", "sync"] }
+tokio = { version = "1.23.0", features = ["net", "rt-multi-thread", "time", "sync"] }
 tokio-rustls = { version = "0.23.4", features = ["early-data"], optional = true }
 rustls-pemfile = "1.0.1"
 
diff --git a/src/libdoh/src/errors.rs b/src/libdoh/src/errors.rs
index aa7b9f0..24ae819 100644
--- a/src/libdoh/src/errors.rs
+++ b/src/libdoh/src/errors.rs
@@ -27,9 +27,9 @@ impl std::fmt::Display for DoHError {
             DoHError::UpstreamIssue => write!(fmt, "Upstream error"),
             DoHError::UpstreamTimeout => write!(fmt, "Upstream timeout"),
             DoHError::StaleKey => write!(fmt, "Stale key material"),
-            DoHError::Hyper(e) => write!(fmt, "HTTP error: {}", e),
-            DoHError::Io(e) => write!(fmt, "IO error: {}", e),
-            DoHError::ODoHConfigError(e) => write!(fmt, "ODoH config error: {}", e),
+            DoHError::Hyper(e) => write!(fmt, "HTTP error: {e}"),
+            DoHError::Io(e) => write!(fmt, "IO error: {e}"),
+            DoHError::ODoHConfigError(e) => write!(fmt, "ODoH config error: {e}"),
             DoHError::TooManyTcpSessions => write!(fmt, "Too many TCP sessions"),
         }
     }
diff --git a/src/libdoh/src/lib.rs b/src/libdoh/src/lib.rs
index 3659560..3022a7b 100644
--- a/src/libdoh/src/lib.rs
+++ b/src/libdoh/src/lib.rs
@@ -29,6 +29,12 @@ pub mod reexports {
     pub use tokio;
 }
 
+const BASE64_URL_SAFE_NO_PAD: base64::engine::fast_portable::FastPortable =
+    base64::engine::fast_portable::FastPortable::from(
+        &base64::alphabet::URL_SAFE,
+        base64::engine::fast_portable::NO_PAD,
+    );
+
 #[derive(Clone, Debug)]
 struct DnsResponse {
     packet: Vec<u8>,
@@ -162,7 +168,7 @@ impl DoH {
             }
         }
         let query = match question_str.and_then(|question_str| {
-            base64::decode_config(question_str, base64::URL_SAFE_NO_PAD).ok()
+            base64::decode_engine(question_str, &BASE64_URL_SAFE_NO_PAD).ok()
         }) {
             Some(query) => query,
             _ => return None,
@@ -427,8 +433,7 @@ impl DoH {
             .header(
                 hyper::header::CACHE_CONTROL,
                 format!(
-                    "max-age={}, stale-if-error={}, stale-while-revalidate={}",
-                    ttl, STALE_IF_ERROR_SECS, STALE_WHILE_REVALIDATE_SECS
+                    "max-age={ttl}, stale-if-error={STALE_IF_ERROR_SECS}, stale-while-revalidate={STALE_WHILE_REVALIDATE_SECS}"
                 )
                 .as_str(),
             );
@@ -495,9 +500,9 @@ impl DoH {
                 self.globals.tls_cert_path.is_some() && self.globals.tls_cert_key_path.is_some();
         }
         if tls_enabled {
-            println!("Listening on https://{}{}", listen_address, path);
+            println!("Listening on https://{listen_address}{path}");
         } else {
-            println!("Listening on http://{}{}", listen_address, path);
+            println!("Listening on http://{listen_address}{path}");
         }
 
         let mut server = Http::new();
diff --git a/src/libdoh/src/odoh.rs b/src/libdoh/src/odoh.rs
index 072d89c..00bb95f 100644
--- a/src/libdoh/src/odoh.rs
+++ b/src/libdoh/src/odoh.rs
@@ -115,7 +115,7 @@ impl ODoHRotator {
                     Ok(key) => {
                         current_key.store(Arc::new(key));
                     }
-                    Err(e) => eprintln!("ODoH key rotation error: {}", e),
+                    Err(e) => eprintln!("ODoH key rotation error: {e}"),
                 };
             }
         });
diff --git a/src/libdoh/src/tls.rs b/src/libdoh/src/tls.rs
index 4c1dae0..ccc4585 100644
--- a/src/libdoh/src/tls.rs
+++ b/src/libdoh/src/tls.rs
@@ -30,8 +30,7 @@ where
             io::Error::new(
                 e.kind(),
                 format!(
-                    "Unable to load the certificates [{}]: {}",
-                    certs_path_str, e
+                    "Unable to load the certificates [{certs_path_str}]: {e}"
                 ),
             )
         })?);
@@ -54,8 +53,7 @@ where
                     io::Error::new(
                         e.kind(),
                         format!(
-                            "Unable to load the certificate keys [{}]: {}",
-                            certs_keys_path_str, e
+                            "Unable to load the certificate keys [{certs_keys_path_str}]: {e}"
                         ),
                     )
                 })?
@@ -163,7 +161,7 @@ impl DoH {
                             break;
                         }
                     }
-                    Err(e) => eprintln!("TLS certificates error: {}", e),
+                    Err(e) => eprintln!("TLS certificates error: {e}"),
                 }
                 tokio::time::sleep(Duration::from_secs(CERTS_WATCH_DELAY_SECS.into())).await;
             }