diff --git a/images/port_manager/gluetun-port-mgr/Cargo.lock b/images/port_manager/gluetun-port-mgr/Cargo.lock
index 1d0c5fb10..1721fd875 100644
--- a/images/port_manager/gluetun-port-mgr/Cargo.lock
+++ b/images/port_manager/gluetun-port-mgr/Cargo.lock
@@ -531,9 +531,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.126"
+version = "1.0.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3b863381a05ffefbc82571a2d893edf47b27fb0ebedbf582c39640e51abebef"
+checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
 dependencies = [
  "itoa",
  "memchr",