diff --git a/CHANGELOG.md b/CHANGELOG.md
index 706e5e8..29b0679 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/), and this
 
 ## [Unreleased]
 
+## [5.10.1] - 2026-05-08
+
+### Fixed
+
+- **S3 MPU object URI mismatch with trailing output paths** — fixed HTTP data URI joining when `item-output-path` ends with `/` and generated item names are bare. MPU init, part upload, complete, and abort requests now use the same object URI, avoiding backend-specific `404 Not Found` failures on storage systems that treat repeated slashes as significant object key characters. (PR #115)
+
 ## [5.10.0] - 2026-05-07
 
 ### Added
diff --git a/VERSION b/VERSION
index 509b0b6..4e32c7b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.10.0
+5.10.1
diff --git a/engine/core/spt-base/src/main/resources/config/defaults.yaml b/engine/core/spt-base/src/main/resources/config/defaults.yaml
index b5b34cd..02bb1b1 100644
--- a/engine/core/spt-base/src/main/resources/config/defaults.yaml
+++ b/engine/core/spt-base/src/main/resources/config/defaults.yaml
@@ -117,7 +117,7 @@ run:
   node: false
   port: 9999
   scenario: null
-  version: 5.10.0
+  version: 5.10.1
 
 log:
   level: info