diff --git a/Cargo.lock b/Cargo.lock
index 57bdbe74..c2349626 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -220,9 +220,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ea22880d78093b0cbe17c89f64a7d457941e65759157ec6cb31a31d652b05e5"
+checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
 [[package]]
 name = "bdk"
@@ -4022,7 +4022,7 @@ dependencies = [
  "async-trait",
  "atty",
  "backoff",
- "base64 0.20.0",
+ "base64 0.21.0",
  "bdk",
  "big-bytes",
  "bitcoin",
diff --git a/swap/Cargo.toml b/swap/Cargo.toml
index 3f40ce71..747a195a 100644
--- a/swap/Cargo.toml
+++ b/swap/Cargo.toml
@@ -14,7 +14,7 @@ async-compression = { version = "0.3", features = [ "bzip2", "tokio" ] }
 async-trait = "0.1"
 atty = "0.2"
 backoff = { version = "0.4", features = [ "tokio" ] }
-base64 = "0.20"
+base64 = "0.21"
 bdk = "0.25"
 big-bytes = "1"
 bitcoin = { version = "0.29", features = [ "rand", "serde" ] }
diff --git a/swap/src/seed.rs b/swap/src/seed.rs
index 9e34c2db..2230ccef 100644
--- a/swap/src/seed.rs
+++ b/swap/src/seed.rs
@@ -187,6 +187,9 @@ mod tests {
 
     #[test]
     fn seed_from_pem_works() {
+        use base64::engine::general_purpose;
+        use base64::Engine;
+
         let payload: &str = "syl9wSYaruvgxg9P5Q1qkZaq5YkM6GvXkxe+VYrL/XM=";
 
         // 32 bytes base64 encoded.
@@ -195,7 +198,7 @@ syl9wSYaruvgxg9P5Q1qkZaq5YkM6GvXkxe+VYrL/XM=
 -----END SEED-----
 ";
 
-        let want = base64::decode(payload).unwrap();
+        let want = general_purpose::STANDARD.decode(payload).unwrap();
         let pem = pem::parse(pem_string).unwrap();
         let got = Seed::from_pem(pem).unwrap();