diff --git a/linux-clang-format/Dockerfile b/linux-clang-format/Dockerfile
index d8712b4..a9d2782 100644
--- a/linux-clang-format/Dockerfile
+++ b/linux-clang-format/Dockerfile
@@ -1,4 +1,5 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y git clang-format-10 p7zip-full
diff --git a/linux-flatpak/Dockerfile b/linux-flatpak/Dockerfile
index c93a07d..4e33784 100644
--- a/linux-flatpak/Dockerfile
+++ b/linux-flatpak/Dockerfile
@@ -1,5 +1,6 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y p7zip-full wget git flatpak flatpak-builder ca-certificates sshfs curl fuse dnsutils gnupg2 sudo
 RUN flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
diff --git a/linux-fresh/Dockerfile b/linux-fresh/Dockerfile
index 7d7d4a3..254cc6c 100644
--- a/linux-fresh/Dockerfile
+++ b/linux-fresh/Dockerfile
@@ -1,4 +1,5 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y p7zip-full build-essential libsdl2-dev qtbase5-dev libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools libavcodec-dev libavfilter-dev libavformat-dev libswscale-dev wget git ccache cmake ninja-build
diff --git a/linux-frozen/Dockerfile b/linux-frozen/Dockerfile
index ecd316a..043beaf 100644
--- a/linux-frozen/Dockerfile
+++ b/linux-frozen/Dockerfile
@@ -1,18 +1,19 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN mkdir -p /tmp/pkgs
 COPY install_package.py /tmp/pkgs
-RUN apt-get update && apt-get install -y p7zip-full build-essential wget git python-launchpadlib ccache ninja-build
-RUN cd /tmp/pkgs && python2 install_package.py \
-    libsdl2-dev 2.0.7+dfsg1-3ubuntu1 bionic          \
-    qtbase5-dev 5.9.3+dfsg-0ubuntu2 bionic           \
-    libqt5opengl5-dev 5.9.3+dfsg-0ubuntu2 bionic     \
-    qt5-qmltooling-plugins 5.9.3-0ubuntu1 bionic     \
-    qtdeclarative5-dev 5.9.3-0ubuntu1 bionic         \
-    qtmultimedia5-dev 5.9.3-0ubuntu3 bionic          \
-    libicu57 57.1-6ubuntu0.2 bionic                  \
-    cmake 3.10.2-1ubuntu2 bionic                     \
-    libavcodec-dev 7:3.4.4-0ubuntu0.18.04.1 bionic   \
-    libavformat-dev 7:3.4.4-0ubuntu0.18.04.1 bionic  \
-    libswscale-dev 7:3.4.4-0ubuntu0.18.04.1 bionic
+RUN apt-get update && apt-get install -y p7zip-full build-essential wget git python3-launchpadlib ccache ninja-build
+RUN cd /tmp/pkgs && python3 install_package.py \
+    libsdl2-dev 2.0.10+dfsg1-3 focal          \
+    qtbase5-dev 5.12.8+dfsg-0ubuntu1 focal           \
+    libqt5opengl5-dev 5.12.8+dfsg-0ubuntu1 focal     \
+    qt5-qmltooling-plugins 5.12.8-0ubuntu1 focal     \
+    qtdeclarative5-dev 5.12.8-0ubuntu1 focal         \
+    qtmultimedia5-dev 5.12.8-0ubuntu1 focal          \
+    libicu66 66.1-2ubuntu2 focal                  \
+    cmake 3.16.3-1ubuntu1 focal                     \
+    libavcodec-dev 7:4.2.4-1ubuntu0.1 focal   \
+    libavformat-dev 7:4.2.4-1ubuntu0.1 focal  \
+    libswscale-dev 7:4.2.4-1ubuntu0.1 focal
 RUN rm -rf /tmp/pkgs
diff --git a/linux-frozen/install_package.py b/linux-frozen/install_package.py
index 50473c2..fd884a6 100755
--- a/linux-frozen/install_package.py
+++ b/linux-frozen/install_package.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 import sys
 import re
@@ -27,8 +27,8 @@ def get_url(pkg, distro):
 
 def list_dependencies(deb_file):
     t = subprocess.check_output(
-        ['bash', '-c', '(dpkg -I {} | grep -oP "^ Depends\: \K.*$") || true'.format(deb_file)])
-    deps = [i.split('|')[0].strip() for i in t.split(',')]
+        ['bash', '-c', '(dpkg -I {} | grep -oP "^ Depends\\: \\K.*$") || true'.format(deb_file)])
+    deps = [i.split(b'|')[0].decode('utf-8').strip() for i in t.split(b',')]
     equals_re = re.compile(r'^(.*) \(= (.*)\)$')
     return [equals_re.sub(r'\1=\2', i).split('=') for i in filter(equals_re.match, deps)]
 
diff --git a/linux-mingw/Dockerfile b/linux-mingw/Dockerfile
index e8d89aa..5c44250 100644
--- a/linux-mingw/Dockerfile
+++ b/linux-mingw/Dockerfile
@@ -1,5 +1,6 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN mkdir -p /tmp/pkgs
 RUN apt-get update && apt-get install -y gpg wget git python3-pip ccache p7zip-full g++-mingw-w64-x86-64 gcc-mingw-w64-x86-64 mingw-w64-tools cmake ninja-build
 # workaround broken headers in Ubuntu MinGW package
diff --git a/linux-transifex/Dockerfile b/linux-transifex/Dockerfile
index f884454..81d4a04 100644
--- a/linux-transifex/Dockerfile
+++ b/linux-transifex/Dockerfile
@@ -1,5 +1,6 @@
 FROM debian:buster-slim
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
-RUN apt-get install -y p7zip-full libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools python3-pip cmake
+RUN apt-get install -y git p7zip-full libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools python3-pip cmake
 RUN pip3 install transifex-client