diff --git a/contrib/android/apt.sources.list b/contrib/android/apt.sources.list
index 7a9bb8a98..b1a8f892b 100644
--- a/contrib/android/apt.sources.list
+++ b/contrib/android/apt.sources.list
@@ -1,2 +1,2 @@
-deb https://snapshot.debian.org/archive/debian/20230629T090352Z/ bookworm main
-deb-src https://snapshot.debian.org/archive/debian/20230629T090352Z/ bookworm main
+deb https://snapshot.debian.org/archive/debian/20250530T143637Z/ bookworm main
+deb-src https://snapshot.debian.org/archive/debian/20250530T143637Z/ bookworm main
diff --git a/contrib/build-linux/appimage/Dockerfile b/contrib/build-linux/appimage/Dockerfile
index 9c5742656..cfedc1782 100644
--- a/contrib/build-linux/appimage/Dockerfile
+++ b/contrib/build-linux/appimage/Dockerfile
@@ -2,7 +2,7 @@
 # from https://docs.appimage.org/introduction/concepts.html :
 # "[AppImages] should be built on the oldest possible system, allowing them to run on newer system[s]"
 
-FROM debian:buster@sha256:233c3bbc892229c82da7231980d50adceba4db56a08c0b7053a4852782703459
+FROM debian:bullseye@sha256:cf48c31af360e1c0a0aedd33aae4d928b68c2cdf093f1612650eb1ff434d1c34
 
 ENV LC_ALL=C.UTF-8 LANG=C.UTF-8
 ENV DEBIAN_FRONTEND=noninteractive
@@ -57,8 +57,7 @@ RUN apt-get update -q && \
         libxcb-icccm4 \
         libxcb-image0 \
         libxcb-keysyms1 \
-        libxcb-util0 \
-        #libxcb-util1 \
+        libxcb-util1 \
         libxcb-render-util0 \
         libxcb-cursor0 \
         libx11-xcb1 \
diff --git a/contrib/build-linux/appimage/README.md b/contrib/build-linux/appimage/README.md
index db721f4d1..7b230d0c5 100644
--- a/contrib/build-linux/appimage/README.md
+++ b/contrib/build-linux/appimage/README.md
@@ -4,7 +4,7 @@ AppImage binary for Electrum
 ✓ _This binary should be reproducible, meaning you should be able to generate
    binaries that match the official releases._
 
-- _Minimum supported target system (i.e. what end-users need): x86_64, glibc 2.28_
+- _Minimum supported target system (i.e. what end-users need): x86_64, glibc 2.31_
 
 This assumes an Ubuntu host, but it should not be too hard to adapt to another
 similar system. The host architecture should be x86_64 (amd64).
diff --git a/contrib/build-linux/appimage/apt.sources.list b/contrib/build-linux/appimage/apt.sources.list
index 975ddfd5b..30814e600 100644
--- a/contrib/build-linux/appimage/apt.sources.list
+++ b/contrib/build-linux/appimage/apt.sources.list
@@ -1,2 +1,2 @@
-deb https://snapshot.debian.org/archive/debian/20230317T205011Z/ buster main
-deb-src https://snapshot.debian.org/archive/debian/20230317T205011Z/ buster main
\ No newline at end of file
+deb https://snapshot.debian.org/archive/debian/20250530T143637Z/ bullseye main
+deb-src https://snapshot.debian.org/archive/debian/20250530T143637Z/ bullseye main
diff --git a/contrib/build-linux/appimage/make_appimage.sh b/contrib/build-linux/appimage/make_appimage.sh
index 25bcc7274..6509c51d2 100755
--- a/contrib/build-linux/appimage/make_appimage.sh
+++ b/contrib/build-linux/appimage/make_appimage.sh
@@ -95,29 +95,6 @@ fi
 cp -f "$DLL_TARGET_DIR/libzbar.so.0" "$APPDIR/usr/lib/" || fail "Could not copy libzbar to its destination"
 
 
-# note: libxcb-util1 is not available in debian 10 (buster), only libxcb-util0. So we build it ourselves.
-#       This pkg is needed on some distros for Qt to launch. (see #8011)
-download_if_not_exist "$CACHEDIR/xcb-util_0.4.0.orig.tar.gz" "http://deb.debian.org/debian/pool/main/x/xcb-util/xcb-util_0.4.0.orig.tar.gz"
-verify_hash "$CACHEDIR/xcb-util_0.4.0.orig.tar.gz" "0ed0934e2ef4ddff53fcc70fc64fb16fe766cd41ee00330312e20a985fd927a7"
-info "building libxcb-util1."
-(
-    if [ -f "$CACHEDIR/libxcb-util1/util/src/.libs/libxcb-util.so.1" ]; then
-        info "libxcb-util1 already built, skipping"
-        exit 0
-    fi
-    cd "$CACHEDIR"
-    mkdir "libxcb-util1"
-    cd "libxcb-util1"
-    tar xf "$CACHEDIR/xcb-util_0.4.0.orig.tar.gz" -C .
-    mv "xcb-util-0.4.0" util
-    cd util
-    ./autogen.sh
-    ./configure --enable-shared
-    make "-j$CPU_COUNT" -s || fail "Could not build libxcb-util1"
-) || fail "Could build libxcb-util1"
-cp "$CACHEDIR/libxcb-util1/util/src/.libs/libxcb-util.so.1" "$APPDIR/usr/lib/libxcb-util.so.1"
-
-
 appdir_python() {
     env \
         PYTHONNOUSERSITE=1 \
diff --git a/contrib/build-wine/apt.sources.list b/contrib/build-wine/apt.sources.list
index b2128cdec..b1a8f892b 100644
--- a/contrib/build-wine/apt.sources.list
+++ b/contrib/build-wine/apt.sources.list
@@ -1,2 +1,2 @@
-deb https://snapshot.debian.org/archive/debian/20240419T084725Z/ bookworm main
-deb-src https://snapshot.debian.org/archive/debian/20240419T084725Z/ bookworm main
\ No newline at end of file
+deb https://snapshot.debian.org/archive/debian/20250530T143637Z/ bookworm main
+deb-src https://snapshot.debian.org/archive/debian/20250530T143637Z/ bookworm main
diff --git a/contrib/freeze_containers_distro.sh b/contrib/freeze_containers_distro.sh
index 6958d1f96..f942079a4 100755
--- a/contrib/freeze_containers_distro.sh
+++ b/contrib/freeze_containers_distro.sh
@@ -5,7 +5,7 @@
 set -e
 
 DEBIAN_SNAPSHOT_BASE="https://snapshot.debian.org/archive/debian/"
-DEBIAN_APPIMAGE_DISTRO="buster"  # should match build-linux/appimage Dockerfile base
+DEBIAN_APPIMAGE_DISTRO="bullseye"  # should match build-linux/appimage Dockerfile base
 DEBIAN_WINE_DISTRO="bookworm"    # should match build-wine Dockerfile base
 DEBIAN_ANDROID_DISTRO="bookworm" # should match android Dockerfile base