diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5515985..1f1348b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.31.0] - 2024-07-25
+
+### Changed
+    - Bump Flex and Stax SDK versions
+
 ## [3.30.0] - 2024-07-17
 
 ### Changed
diff --git a/lite/Dockerfile b/lite/Dockerfile
index ec61688..d45b57c 100644
--- a/lite/Dockerfile
+++ b/lite/Dockerfile
@@ -88,12 +88,12 @@ RUN echo nanos2 > $NANOSP_SDK/.target
 
 # Latest Stax SDK (OS stax_1.5.0 => based on API_LEVEL 21)
 ENV STAX_SDK=/opt/stax-secure-sdk
-RUN git -C "$LEDGER_SECURE_SDK" worktree add "$STAX_SDK" v21.2.1
+RUN git -C "$LEDGER_SECURE_SDK" worktree add "$STAX_SDK" v21.3.0
 RUN echo stax > $STAX_SDK/.target
 
-# Latest Flex SDK (OS flex_1.1.0 => based on API_LEVEL 21)
+# Latest Flex SDK (OS flex_1.1.1 => based on API_LEVEL 21)
 ENV FLEX_SDK=/opt/flex-secure-sdk
-RUN git -C "$LEDGER_SECURE_SDK" worktree add "$FLEX_SDK" v21.2.1
+RUN git -C "$LEDGER_SECURE_SDK" worktree add "$FLEX_SDK" v21.3.0
 RUN echo flex > $FLEX_SDK/.target
 
 # Default SDK