diff --git a/.github/workflows/elixir_test.yml b/.github/workflows/elixir_test.yml
index 06473c77..7ffa4b72 100644
--- a/.github/workflows/elixir_test.yml
+++ b/.github/workflows/elixir_test.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     container:
-      image: hexpm/elixir:1.18.0-erlang-27.2-debian-bullseye-20241202
+      image: hexpm/elixir:1.18.0-erlang-27.2-debian-bookworm-20241202
 
     steps:
       - name: Install git
@@ -53,7 +53,7 @@ jobs:
         id: plt-cache
         with:
           path: priv/plts
-          key: elixir:1.18.0-erlang-27.2-debian-bullseye-20241202-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}-v3
+          key: elixir:1.18.0-erlang-27.2-debian-bookworm-20241202-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}-v3
 
       - name: Create PLTs
         if: steps.plt-cache.outputs.cache-hit != 'true'
diff --git a/.github/workflows/elixir_test_external.yml b/.github/workflows/elixir_test_external.yml
index 8f19e4ba..2a874d58 100644
--- a/.github/workflows/elixir_test_external.yml
+++ b/.github/workflows/elixir_test_external.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     container:
-      image: hexpm/elixir:1.18.0-erlang-27.2-debian-bullseye-20241202
+      image: hexpm/elixir:1.18.0-erlang-27.2-debian-bookworm-20241202
 
     steps:
       - name: Install git
diff --git a/.tool-versions b/.tool-versions
index 1ed3f62c..031d43bb 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
 elixir 1.18.0-otp-27
-erlang 27.0
+erlang 27.2
diff --git a/Dockerfile b/Dockerfile
index 9f9c3758..09773b86 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM hexpm/elixir:1.18.0-erlang-27.2-debian-bullseye-20241202 as builder
+FROM hexpm/elixir:1.18.0-erlang-27.2-debian-bookworm-20241202 as builder
 
 RUN apt-get update && \
   apt-get install bash -y
@@ -13,7 +13,7 @@ COPY . .
 # Builds an escript bin/elixir_analyzer
 RUN ./bin/build.sh
 
-FROM hexpm/elixir:1.18.0-erlang-27.2-debian-bullseye-20241202
+FROM hexpm/elixir:1.18.0-erlang-27.2-debian-bookworm-20241202
 COPY --from=builder /etc/passwd /etc/passwd
 
 COPY --from=builder /elixir-analyzer/bin /opt/analyzer/bin
diff --git a/backup b/backup
deleted file mode 100755
index 1d3b5116..00000000
Binary files a/backup and /dev/null differ