diff --git a/Cargo.lock b/Cargo.lock
index 7b99425..11d5137 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -177,9 +177,9 @@ checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
 [[package]]
 name = "async-trait"
-version = "0.1.91"
+version = "0.1.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae36dc4177970ef04fde5178d3e2429882def40e57a451f919c098f72baa6cec"
+checksum = "82f6aeea286b8eb4dd3431a1be1b59d290ace00f5bfd8e2a159bc2a05e2c1667"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -414,9 +414,9 @@ checksum = "382ce8820a5bb815055d3553a610e8cb542b2d767bbacea99038afda96cd760d"
 
 [[package]]
 name = "cryptoxide"
-version = "0.5.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "facfae029ec4373769eb4bd936bcf537de1052abaee9f246e667c9443be6aa95"
+checksum = "93f80e26fec88f5ae9450cd5f4e59f5c6421abafc919ea68a3edd521f9580c9b"
 
 [[package]]
 name = "curve25519-dalek"
@@ -487,11 +487,11 @@ checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
 
 [[package]]
 name = "ed25519-bip32"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9bf77cf581d1a8c5f73c45e6d31aa45cfcb94438310f2f628b07e4727949115"
+checksum = "10c212afef25445afd5cd3fc05941661b0473e681d7a39991b46c2821dbb9ba6"
 dependencies = [
- "cryptoxide 0.5.1",
+ "cryptoxide 0.6.2",
 ]
 
 [[package]]
diff --git a/Dockerfile b/Dockerfile
index ab48c24..8082e84 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.26
+# syntax=docker/dockerfile:1.4
 # aldabra — Cardano lite wallet over MCP.
 #
 # Multi-stage: