diff --git a/src/accounting/Dockerfile b/src/accounting/Dockerfile
index 05b205fb..714086f8 100644
--- a/src/accounting/Dockerfile
+++ b/src/accounting/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
-FROM --platform=${BUILDPLATFORM} mcr.microsoft.com/dotnet/sdk:8.0 AS builder
+FROM --platform=${BUILDPLATFORM} mcr.microsoft.com/dotnet/sdk:9.0 AS builder
 ARG TARGETARCH
 ARG BUILD_CONFIGURATION=Release
 WORKDIR /src
@@ -21,7 +21,7 @@ RUN dotnet publish "./Accounting.csproj" -r linux-$TARGETARCH -c $BUILD_CONFIGUR
 
 # -----------------------------------------------------------------------------
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0
+FROM mcr.microsoft.com/dotnet/aspnet:9.0
 USER app
 WORKDIR /app
 COPY --from=publish /app/publish .
diff --git a/src/cart/src/Dockerfile b/src/cart/src/Dockerfile
index 9e4df984..a5721ea3 100644
--- a/src/cart/src/Dockerfile
+++ b/src/cart/src/Dockerfile
@@ -15,7 +15,7 @@
 # limitations under the License.
 
 # https://mcr.microsoft.com/v2/dotnet/sdk/tags/list
-FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0 AS builder
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:9.0 AS builder
 ARG TARGETARCH
 
 WORKDIR /usr/src/app/
@@ -30,7 +30,7 @@ RUN dotnet publish ./src/cart.csproj -r linux-musl-$TARGETARCH --no-restore -o /
 # -----------------------------------------------------------------------------
 
 # https://mcr.microsoft.com/v2/dotnet/runtime-deps/tags/list
-FROM mcr.microsoft.com/dotnet/runtime-deps:8.0-alpine3.20
+FROM mcr.microsoft.com/dotnet/runtime-deps:9.0-alpine3.20
 
 WORKDIR /usr/src/app/
 COPY --from=builder /cart/ ./