diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44104d1..b16b284 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ 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).
 
+## [3.20.0] - 2024-04-12
+
+### Changed
+    - Bump Flex SDK version
+    - dev-tools: Bump ragger version to 1.18.0 (enabling Flex testing) and Speculos to 0.8.6
+
 ## [3.19.0] - 2024-04-03
 
 ### Added
diff --git a/README.md b/README.md
index de2f906..25fdacc 100644
--- a/README.md
+++ b/README.md
@@ -18,13 +18,13 @@ They can be pulled via these commands:
 
 ```bash
 # pull the default, full image, built from `full/Dockerfile`
-$ sudo docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder:latest
+$ docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder:latest
 # pull the lite image, built from `lite/Dockerfile`
-$ sudo docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder-lite:latest
+$ docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder-lite:latest
 # pull the dev-tools image, built from `dev-tools/Dockerfile`
-$ sudo docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-dev-tools:latest
+$ docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-dev-tools:latest
 # pull the legacy image, built from `legacy/Dockerfile`
-$ sudo docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder-legacy:latest
+$ docker pull ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder-legacy:latest
 ```
 
 ## Compile your app in the container
diff --git a/dev-tools/Dockerfile b/dev-tools/Dockerfile
index 4d79d8e..8b3f8d4 100644
--- a/dev-tools/Dockerfile
+++ b/dev-tools/Dockerfile
@@ -20,4 +20,4 @@ ARG PYTHON_BUILD_DEPS=libffi-dev,python3-dev,py3-virtualenv
 RUN apk add $(echo -n "$PYTHON_BUILD_DEPS" | tr , ' ')
 
 # Install test tools (Ragger framework, Speculos emulator, Ledgerblue...)
-RUN pip3 install --no-cache-dir "ragger[tests,all_backends]~=1.16"
+RUN pip3 install --no-cache-dir "ragger[tests,all_backends]==1.18.0" "speculos==0.8.6"
diff --git a/lite/Dockerfile b/lite/Dockerfile
index 8a81490..1c3a007 100644
--- a/lite/Dockerfile
+++ b/lite/Dockerfile
@@ -91,7 +91,7 @@ RUN echo stax > $STAX_SDK/.target
 
 # Latest Flex SDK (OS europa_0.1.0-re3 => based on API_LEVEL 18)
 ENV FLEX_SDK=/opt/flex-secure-sdk
-RUN git -C "$LEDGER_SECURE_SDK" worktree add "$FLEX_SDK" v18.1.0
+RUN git -C "$LEDGER_SECURE_SDK" worktree add "$FLEX_SDK" v18.2.0
 RUN echo flex > $FLEX_SDK/.target
 
 # Default SDK