diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 957c881..e0353fd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,31 +5,28 @@ on: [push, pull_request]
 jobs:
   build:
     name: Test
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       CGO_CFLAGS_ALLOW: -Xpreprocessor
-      VIPS_VERSION: 8.14.3
+      VIPS_VERSION: 8.14.5
       FFMPEG_VERSION: 5.1.2
-      V: 2
+      V: 4
 
     steps:
       - name: Set up Go 1.x
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.20
+          go-version: ^1.21
 
       - name: Check out code
         uses: actions/checkout@v2
 
       - name: Install linux dependencies
         run: |
-          sudo add-apt-repository -y ppa:lovell/cgif
-          sudo add-apt-repository -y ppa:strukturag/libde265
-          sudo add-apt-repository -y ppa:strukturag/libheif
           sudo apt-get update
           sudo apt-get install -y \
-          python3-pip ninja-build \
-          glib-2.0-dev libexpat-dev librsvg2-dev libpng-dev \
+          meson ninja-build \
+          libglib2.0-dev libexpat-dev librsvg2-dev libpng-dev \
           libjpeg-turbo8-dev libimagequant-dev libfftw3-dev \
           libpoppler-glib-dev libxml2-dev \
           libopenslide-dev libcfitsio-dev liborc-0.4-dev libpango1.0-dev \
@@ -37,7 +34,6 @@ jobs:
           yasm libx264-dev libx265-dev libnuma-dev libvpx-dev libtheora-dev  \
           librtmp-dev libvorbis-dev \
           libopenjp2-7-dev libcgif-dev
-          sudo pip3 install meson
 
       - name: Cache libvips
         uses: actions/cache@v3
diff --git a/Dockerfile b/Dockerfile
index a7f1583..55d9755 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,13 @@
-ARG GOLANG_VERSION=1.20.6
-FROM golang:${GOLANG_VERSION}-bullseye as builder
+ARG GOLANG_VERSION=1.21.4
+FROM golang:${GOLANG_VERSION}-bookworm as builder
 
 ARG FFMPEG_VERSION=5.1.2
 ARG VIPS_VERSION=8.14.3
-ARG CGIF_VERSION=0.3.0
-ARG LIBSPNG_VERSION=0.7.3
 ARG TARGETARCH
 
 ENV PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
 ENV MAKEFLAGS="-j8"
 
-# libaom3 is in Debian bullseye-backports 
-RUN echo 'deb http://deb.debian.org/debian bullseye-backports main' > /etc/apt/sources.list.d/backports.list
 
 # Installs libvips + required libraries
 RUN DEBIAN_FRONTEND=noninteractive \
@@ -19,33 +15,13 @@ RUN DEBIAN_FRONTEND=noninteractive \
   apt-get install --no-install-recommends -y \
   ca-certificates \
   automake build-essential curl \
-  python3-pip ninja-build pkg-config \
+  meson ninja-build pkg-config \
   gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg62-turbo-dev libpng-dev \
-  libwebp-dev libtiff5-dev libexif-dev libxml2-dev libpoppler-glib-dev \
+  libwebp-dev libtiff-dev libexif-dev libxml2-dev libpoppler-glib-dev \
   swig libpango1.0-dev libmatio-dev libopenslide-dev libcfitsio-dev libopenjp2-7-dev \
-  libgsf-1-dev fftw3-dev liborc-0.4-dev librsvg2-dev libimagequant-dev libaom-dev/bullseye-backports libheif-dev \
+  libgsf-1-dev libfftw3-dev liborc-0.4-dev librsvg2-dev libimagequant-dev libaom-dev libheif-dev \
   yasm libx264-dev libx265-dev libnuma-dev libvpx-dev libtheora-dev  \
-  librtmp-dev libvorbis-dev && \
-  pip3 install meson && \
-  cd /tmp && \
-    curl -fsSLO https://github.com/dloebl/cgif/archive/refs/tags/V${CGIF_VERSION}.tar.gz && \
-    tar xf V${CGIF_VERSION}.tar.gz && \
-    cd cgif-${CGIF_VERSION} && \
-    meson build --prefix=/usr/local --libdir=/usr/local/lib --buildtype=release && \
-    cd build && \
-    ninja && \
-    ninja install && \
-  cd /tmp && \
-    curl -fsSLO https://github.com/randy408/libspng/archive/refs/tags/v${LIBSPNG_VERSION}.tar.gz && \
-    tar xf v${LIBSPNG_VERSION}.tar.gz && \
-    cd libspng-${LIBSPNG_VERSION} && \
-    meson setup _build \
-      --buildtype=release \
-      --strip \
-      --prefix=/usr/local \
-      --libdir=lib && \
-    ninja -C _build && \
-    ninja -C _build install && \
+  libspng-dev libcgif-dev librtmp-dev libvorbis-dev && \
   cd /tmp && \
     curl -fsSLO https://github.com/libvips/libvips/releases/download/v${VIPS_VERSION}/vips-${VIPS_VERSION}.tar.xz && \
     tar xf vips-${VIPS_VERSION}.tar.xz && \
@@ -98,22 +74,22 @@ COPY . .
 RUN if [ "$TARGETARCH" = "amd64" ]; then go test ./...; fi
 RUN go build -o ${GOPATH}/bin/imagorvideo ./cmd/imagorvideo/main.go
 
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 LABEL maintainer="adrian@cshum.com"
 
 COPY --from=builder /usr/local/lib /usr/local/lib
 COPY --from=builder /etc/ssl/certs /etc/ssl/certs
-COPY --from=builder /etc/apt/sources.list.d/backports.list /etc/apt/sources.list.d/backports.list
 
 # Install runtime dependencies
 RUN DEBIAN_FRONTEND=noninteractive \
   apt-get update && \
   apt-get install --no-install-recommends -y \
-  procps libglib2.0-0 libjpeg62-turbo libpng16-16 libopenexr25 \
-  libwebp6 libwebpmux3 libwebpdemux2 libtiff5 libexif12 libxml2 libpoppler-glib8 \
+  procps libglib2.0-0 libjpeg62-turbo libpng16-16 libopenexr-3-1-30 \
+  libwebp7 libwebpmux3 libwebpdemux2 libtiff6 libexif12 libxml2 libpoppler-glib8 \
   libpango1.0-0 libmatio11 libopenslide0 libopenjp2-7 libjemalloc2 \
-  libgsf-1-114 fftw3 liborc-0.4-0 librsvg2-2 libcfitsio9 libimagequant0 libaom3 libheif1 \
-  libx264-dev libx265-dev libnuma-dev libvpx6 libtheora0 libvorbis-dev && \
+  libgsf-1-114 libfftw3-bin liborc-0.4-0 librsvg2-2 libcfitsio10 libimagequant0 libaom3 libheif1 \
+  libx264-dev libx265-dev libnuma-dev libvpx6 libtheora0 libvorbis-dev \
+  libspng0 libcgif0 && \
   ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so && \
   apt-get autoremove -y && \
   apt-get autoclean && \