diff --git a/docker/functions/Dockerfile b/docker/functions/Dockerfile
index 6cd3559c5..2b554adbf 100644
--- a/docker/functions/Dockerfile
+++ b/docker/functions/Dockerfile
@@ -17,7 +17,7 @@ USER nonroot
 EXPOSE 8080
 
 # Copy the DICOM Server repository and build the Azure Functions project
-FROM mcr.microsoft.com/dotnet/sdk:6.0.402-alpine3.16@sha256:cfaf6935ad6ec66ae0be7af332523d21cc810d74120b21d95376ae9581090a09 AS build
+FROM mcr.microsoft.com/dotnet/sdk:7.0.201-alpine3.16@sha256:09dd82cabd01247cf7f0e8b343adcc6cecb07300118831e28ac06195dce18eae AS build
 ARG BUILD_CONFIGURATION=Release
 ARG CONTINUOUS_INTEGRATION_BUILD=false
 WORKDIR /dicom-server