diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 915ab84..867004b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ 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 & jq
diff --git a/.tool-versions b/.tool-versions
index 1ed3f62..031d43b 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 8fe8e43..1bdf0c5 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
 
 # Install SSL ca certificates
 RUN apt-get update && \
@@ -14,7 +14,7 @@ COPY . .
 # Builds an escript bin/elixir_representer
 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-representer/bin /opt/representer/bin
 RUN apt-get update && \