diff --git a/.github/workflows/elixir_tests.yml b/.github/workflows/elixir_tests.yml
index 51a1d82..aa1926c 100644
--- a/.github/workflows/elixir_tests.yml
+++ b/.github/workflows/elixir_tests.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     container:
-      image: hexpm/elixir:1.15.2-erlang-26.0.2-debian-bookworm-20230612
+      image: hexpm/elixir:1.16.0-erlang-26.2.1-debian-bookworm-20231009
 
     steps:
       - name: Install git
diff --git a/.github/workflows/exercism_test_helper_build_test.yml b/.github/workflows/exercism_test_helper_build_test.yml
index 6b615b1..def7c0c 100644
--- a/.github/workflows/exercism_test_helper_build_test.yml
+++ b/.github/workflows/exercism_test_helper_build_test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     container:
-      image: hexpm/elixir:1.15.2-erlang-26.0.2-debian-bookworm-20230612
+      image: hexpm/elixir:1.16.0-erlang-26.2.1-debian-bookworm-20231009
 
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
diff --git a/.tool-versions b/.tool-versions
index 0f11382..000a611 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-elixir 1.15.2-otp-26
-erlang 26.0.2
+elixir 1.16.0-otp-26
+erlang 26.2.1
diff --git a/Dockerfile b/Dockerfile
index d2d0b60..cf50ca7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM hexpm/elixir:1.15.2-erlang-26.0.2-debian-bookworm-20230612
+FROM hexpm/elixir:1.16.0-erlang-26.2.1-debian-bookworm-20231009
 
 # Install SSL ca certificates
 RUN apt-get update && \
diff --git a/README.md b/README.md
index ce3cd19..7a0784a 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Exercism Automated Test Runner for Elixir Exercises
 
 ## Environment
 
-The test runner currently targets exercises supporting Elixir >= 1.6 and Erlang/OTP >= 20, but is running on Elixir 1.15.2 on hexpm's `elixir:1.15.2-erlang-26.0.2-debian-bookworm-20230612` image
+The test runner currently targets exercises supporting Elixir >= 1.11 and Erlang/OTP >= 23, but is running on Elixir 1.16.0 on hexpm's `elixir:1.16.0-erlang-26.2.1-debian-bookworm-20231009` image
 
 The `Dockerfile` also has added `bash`, `jo` and `jq` to the image.
 
diff --git a/elixir b/elixir
index 02d3acc..63e38a1 160000
--- a/elixir
+++ b/elixir
@@ -1 +1 @@
-Subproject commit 02d3acc087e14c06c65576dc17010cdb522b7b55
+Subproject commit 63e38a1ab90594a9e0eda48a558a81e7f0c3d1c3
diff --git a/exercism_test_helper/mix.exs b/exercism_test_helper/mix.exs
index d70aae4..d1260ab 100644
--- a/exercism_test_helper/mix.exs
+++ b/exercism_test_helper/mix.exs
@@ -5,7 +5,7 @@ defmodule ExercismTestHelper.MixProject do
     [
       app: :exercism_test_helper,
       version: "0.1.2",
-      elixir: "~> 1.15",
+      elixir: "~> 1.16",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       escript: escript()
diff --git a/test/hello-world-broken/expected_results.json b/test/hello-world-broken/expected_results.json
index 669c139..f05669f 100644
--- a/test/hello-world-broken/expected_results.json
+++ b/test/hello-world-broken/expected_results.json
@@ -1 +1 @@
-{"version":3,"status":"error","message":"Compiling 1 file (.ex)\nerror: undefined function efmodule/2 (there is no such import)\n  lib/hello_world.ex:1\n\n\n== Compilation error in file lib/hello_world.ex ==\n** (CompileError) lib/hello_world.ex: cannot compile file (errors have been logged)\n    (elixir 1.15.2) lib/kernel/parallel_compiler.ex:377: anonymous fn/5 in Kernel.ParallelCompiler.spawn_workers/8","tests":[]}
\ No newline at end of file
+{"version":3,"status":"error","message":"Compiling 1 file (.ex)\n    error: undefined function efmodule/2 (there is no such import)\n    │\n  1 │ efmodule HelloWorld do\n    │ ^\n    │\n    └─ lib/hello_world.ex:1:1\n\n\n== Compilation error in file lib/hello_world.ex ==\n** (CompileError) lib/hello_world.ex: cannot compile file (errors have been logged)","tests":[]}