diff --git a/Cargo.lock b/Cargo.lock
index 6fe37bd..808fc4f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1698,7 +1698,7 @@ dependencies = [
 name = "provio-mcp"
 version = "0.1.5"
 dependencies = [
- "base64 0.22.1",
+ "base64 0.23.1",
  "httparse",
  "provio-core",
  "serde",
diff --git a/crates/provio-mcp/Cargo.toml b/crates/provio-mcp/Cargo.toml
index ad74d08..abbc379 100644
--- a/crates/provio-mcp/Cargo.toml
+++ b/crates/provio-mcp/Cargo.toml
@@ -18,4 +18,4 @@ ureq = { version = "3", default-features = false, features = ["rustls"] }
 # Agent-facing HTTP/1.1 request parsing (also a ureq dependency).
 httparse = "1"
 # Mcp-Name / Mcp-Param-* `=?base64?…?=` sentinel decoding.
-base64 = "0.22"
+base64 = "0.23"