diff --git a/dotnet-aspnet/Dockerfile.24.04 b/dotnet-aspnet/Dockerfile.24.04
index 75cb751..d8dd6c4 100644
--- a/dotnet-aspnet/Dockerfile.24.04
+++ b/dotnet-aspnet/Dockerfile.24.04
@@ -1,8 +1,8 @@
-ARG UBUNTU_RELEASE=24.04
+ARG UBUNTU_RELEASE=26.04
 ARG USER=app UID=101 GROUP=app GID=101
 ARG CHISEL_VERSION=1.4.1
 
-FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:748740465d0aadaa69ab6e6c295892f17d7a8f44a85090dbb571ec0bb8c5674f AS builder
+FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:7ad0926092b4e45abc5acf33c5cdc9a6de52d5b0e12ed87dd82e5c79a8167f9f AS builder
 ARG USER UID GROUP GID TARGETARCH UBUNTU_RELEASE CHISEL_VERSION
 SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]
 RUN apt-get update \
diff --git a/dotnet-deps/Dockerfile.24.04 b/dotnet-deps/Dockerfile.24.04
index 373b378..b3dd7b5 100644
--- a/dotnet-deps/Dockerfile.24.04
+++ b/dotnet-deps/Dockerfile.24.04
@@ -1,8 +1,8 @@
-ARG UBUNTU_RELEASE=24.04
+ARG UBUNTU_RELEASE=26.04
 ARG USER=app UID=101 GROUP=app GID=101
 ARG CHISEL_VERSION=1.4.1
 
-FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:748740465d0aadaa69ab6e6c295892f17d7a8f44a85090dbb571ec0bb8c5674f AS builder
+FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:7ad0926092b4e45abc5acf33c5cdc9a6de52d5b0e12ed87dd82e5c79a8167f9f AS builder
 ARG USER UID GROUP GID TARGETARCH UBUNTU_RELEASE CHISEL_VERSION
 SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]
 RUN apt-get update \
diff --git a/dotnet-runtime/Dockerfile.24.04 b/dotnet-runtime/Dockerfile.24.04
index 527b219..566b4b7 100644
--- a/dotnet-runtime/Dockerfile.24.04
+++ b/dotnet-runtime/Dockerfile.24.04
@@ -1,8 +1,8 @@
-ARG UBUNTU_RELEASE=24.04
+ARG UBUNTU_RELEASE=26.04
 ARG USER=app UID=101 GROUP=app GID=101
 ARG CHISEL_VERSION=1.4.1
 
-FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:748740465d0aadaa69ab6e6c295892f17d7a8f44a85090dbb571ec0bb8c5674f AS builder
+FROM ubuntu.azurecr.io/ubuntu:$UBUNTU_RELEASE@sha256:7ad0926092b4e45abc5acf33c5cdc9a6de52d5b0e12ed87dd82e5c79a8167f9f AS builder
 ARG USER UID GROUP GID TARGETARCH UBUNTU_RELEASE CHISEL_VERSION
 SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]
 RUN apt-get update \