diff --git a/silabs-multiprotocol/Dockerfile b/silabs-multiprotocol/Dockerfile
index 3852a7fa2..77537c4e5 100644
--- a/silabs-multiprotocol/Dockerfile
+++ b/silabs-multiprotocol/Dockerfile
@@ -90,25 +90,33 @@ FROM --platform=linux/amd64 cross-builder-${BUILD_ARCH} AS zigbeed-builder
 
 ARG GECKO_SDK_VERSION
 
+# Install and sanity check SLC CLI binary
 RUN \
     set -x \
     && apt-get install -y --no-install-recommends \
        python3 \
        python3-jinja2 \
        python3-pip \
-       openjdk-17-jre \
        git-lfs \
+       gnupg \
        unzip \
+    && curl -s https://repos.azul.com/azul-repo.key | gpg --dearmor -o /usr/share/keyrings/azul.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/azul.gpg] https://repos.azul.com/zulu/deb stable main" > /etc/apt/sources.list.d/zulu.list \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+       zulu21-jre \
     && curl -O https://www.silabs.com/documents/login/software/slc_cli_linux.zip \
     && unzip slc_cli_linux.zip \
-    && cd slc_cli/ && chmod +x slc
+    && cd slc_cli/ && chmod +x slc \
+    && ./slc --version
  
 ENV PATH="/usr/src/slc_cli/:$PATH"
 
 RUN \
     set -x \
-    && git clone --depth 1 -b ${GECKO_SDK_VERSION} \
-       https://github.com/SiliconLabs/gecko_sdk.git
+    && curl -o gecko_sdk.zip -L https://github.com/SiliconLabs/gecko_sdk/releases/download/${GECKO_SDK_VERSION}/gecko-sdk.zip \
+    && unzip -q -d gecko_sdk gecko_sdk.zip \
+    && rm gecko_sdk.zip
 
 # zigbeed links against libcpc.so
 COPY --from=cpcd-builder /usr/local/ /usr/${DEBIAN_CROSS_PREFIX}/
diff --git a/silabs-multiprotocol/README.md b/silabs-multiprotocol/README.md
index ef701bee9..407d96a39 100644
--- a/silabs-multiprotocol/README.md
+++ b/silabs-multiprotocol/README.md
@@ -1,4 +1,8 @@
-# Home Assistant Add-on: SiliconLabs Zigbee/OpenThread Multiprotocol Add-on
+> [!CAUTION]
+> Multiprotocol is no longer supported and will be removed in the near future!
+> [Disable multiprotocol support](https://connectzbt1.home-assistant.io/procedures/disable-multiprotocol/) by migrating your radio back to Zigbee or Thread firmware.
+
+# \[DEPRECATED\] Home Assistant Add-on: SiliconLabs Zigbee/OpenThread Multiprotocol Add-on
 
 Zigbee/OpenThread Multiprotocol container for Silicon Labs based radios such as
 Home Assistant Yellow, Home Assistant SkyConnect, and Home Assistant Connect ZBT-1.
diff --git a/silabs-multiprotocol/build.yaml b/silabs-multiprotocol/build.yaml
index b6983d81f..eced3a053 100644
--- a/silabs-multiprotocol/build.yaml
+++ b/silabs-multiprotocol/build.yaml
@@ -6,4 +6,4 @@ build_from:
 args:
   CPCD_VERSION: v4.3.1
   GECKO_SDK_VERSION: v4.3.1
-  UNIVERSAL_SILABS_FLASHER: 0.0.17
+  UNIVERSAL_SILABS_FLASHER: 0.0.31
diff --git a/silabs-multiprotocol/config.yaml b/silabs-multiprotocol/config.yaml
index 6d5b2b11f..675288ef6 100644
--- a/silabs-multiprotocol/config.yaml
+++ b/silabs-multiprotocol/config.yaml
@@ -1,7 +1,7 @@
 ---
 version: 2.4.5
 slug: silabs_multiprotocol
-name: Silicon Labs Multiprotocol
+name: "Silicon Labs Multiprotocol [deprecated]"
 description: Zigbee and OpenThread multiprotocol add-on
 url: >
   https://github.com/home-assistant/addons/tree/master/silabs-multiprotocol
@@ -50,5 +50,5 @@ schema:
   otbr_enable: bool
   otbr_log_level: list(debug|info|notice|warning|error|critical|alert|emergency)
   otbr_firewall: bool
-stage: experimental
+stage: deprecated
 startup: services