diff --git a/Dockerfile b/Dockerfile
index 9eb8bdd4..b41172f9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,8 +31,10 @@ RUN \
 
 # Install Simplicity Commander (unfortunately no stable URL available, this
 # is known to be working with Commander_linux_x86_64_1v15p0b1306.tar.bz).
+ARG SIMPLICITY_COMMANDER_SHA256SUM=ce7b9138c54f4fa0a24c48c8347e55e3e5f8b402d7f32615771bd0403c2d8962
 RUN \
     curl -O https://www.silabs.com/documents/login/software/SimplicityCommander-Linux.zip \
+    && echo "${SIMPLICITY_COMMANDER_SHA256SUM}  SimplicityCommander-Linux.zip" | sha256sum -c \
     && unzip -q SimplicityCommander-Linux.zip \
     && tar -C /opt -xjf SimplicityCommander-Linux/Commander_linux_x86_64_*.tar.bz \
     && rm -r SimplicityCommander-Linux \
@@ -41,34 +43,44 @@ RUN \
 ENV PATH="$PATH:/opt/commander"
 
 # Install Silicon Labs Configurator (slc)
+ARG SLC_CLI_SHA256SUM=da4faa09ef4cbe385da71e5b95a4e444666cf4aaca6066b1095ca13bf5ebf233
 RUN \
     curl -O https://www.silabs.com/documents/login/software/slc_cli_linux.zip \
+    && echo "${SLC_CLI_SHA256SUM}  slc_cli_linux.zip" | sha256sum -c \
     && unzip -q -d /opt slc_cli_linux.zip \
     && rm slc_cli_linux.zip
 
 ENV PATH="$PATH:/opt/slc_cli"
 
 # GCC Embedded Toolchain 12.2.rel1 (for Gecko SDK 4.4.0+)
+ARG GCC_TOOLCHAIN_SHA256SUM=84be93d0f9e96a15addd490b6e237f588c641c8afdf90e7610a628007fc96867
 RUN \
     curl -O https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu/12.2.rel1/binrel/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz \
+    && echo "${GCC_TOOLCHAIN_SHA256SUM}  arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz" | sha256sum -c \
     && tar -C /opt -xf arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz \
     && rm arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz
 
 # Simplicity SDK 2024.6.2
+ARG SIMPLICITY_SDK_SHA256SUM=7e4337c7cc68262dd3a83c8528095774634a0478d40b1c1fd2b462e86236af8a
 RUN \
     curl -o simplicity_sdk_2024.6.2.zip -L https://github.com/SiliconLabs/simplicity_sdk/releases/download/v2024.6.2/gecko-sdk.zip \
+    && echo "${SIMPLICITY_SDK_SHA256SUM}  simplicity_sdk_2024.6.2.zip" | sha256sum -c \
     && unzip -q -d simplicity_sdk_2024.6.2 simplicity_sdk_2024.6.2.zip \
     && rm simplicity_sdk_2024.6.2.zip
 
 # Gecko SDK 4.4.4
+ARG GECKO_SDK_SHA256SUM=831ec7c564df4392b18a8cc8ceb228c114dc3bec604be75807961a4289ee9b20
 RUN \
     curl -o gecko_sdk_4.4.4.zip -L https://github.com/SiliconLabs/gecko_sdk/releases/download/v4.4.4/gecko-sdk.zip \
+    && echo "${GECKO_SDK_SHA256SUM}  gecko_sdk_4.4.4.zip" | sha256sum -c \
     && unzip -q -d gecko_sdk_4.4.4 gecko_sdk_4.4.4.zip \
     && rm gecko_sdk_4.4.4.zip
 
 # ZCL Advanced Platform (ZAP) v2024.09.27
+ARG ZAP_SHA256SUM=22beeae3cf33b04792be379261d68695b5c96986d3b80700c22b1348f4c0421e
 RUN \
     curl -o zap_2024.09.27.zip -L https://github.com/project-chip/zap/releases/download/v2024.09.27/zap-linux-x64.zip \
+    && echo "${ZAP_SHA256SUM}  zap_2024.09.27.zip" | sha256sum -c \
     && unzip -q -d /opt/zap zap_2024.09.27.zip \
     && rm zap_2024.09.27.zip