diff --git a/.drone.yml b/.drone.yml
index ff2c087..e9b616e 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -9,7 +9,7 @@ trigger:
     - release
 steps:
   - name: run tests
-    image: mcr.microsoft.com/dotnet/sdk:7.0
+    image: mcr.microsoft.com/dotnet/sdk:9.0
     commands:
     - dotnet test
 ---
diff --git a/src/Api/Dockerfile b/src/Api/Dockerfile
index 8716f5f..f7ab1a7 100644
--- a/src/Api/Dockerfile
+++ b/src/Api/Dockerfile
@@ -1,13 +1,13 @@
 # syntax=docker/dockerfile:1.4.3
 
-FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine as builder
+FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine as builder
 WORKDIR /build
 COPY ../../. .
 RUN dotnet publish -c Release -o /build/publish src/Api/Api.csproj
 
 #########################################################################
 
-FROM mcr.microsoft.com/dotnet/aspnet:7.0-alpine AS final
+FROM mcr.microsoft.com/dotnet/aspnet:9.0-alpine AS final
 WORKDIR /app
 EXPOSE 80
 COPY --from=builder /build/publish .
diff --git a/src/Web/Dockerfile b/src/Web/Dockerfile
index 0d2e667..4630f5d 100644
--- a/src/Web/Dockerfile
+++ b/src/Web/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.4.3
 
-FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine as builder
+FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine as builder
 WORKDIR /build
 COPY ../../. .
 RUN dotnet publish -c Release -o /build/publish src/Web/Web.csproj