diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index f42ada9..be5f2ba 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         otp: ['23.3']
-        elixir: ['1.11']
+        elixir: ['1.12']
     env:
       HEX_API_KEY: ${{ secrets.HEX_API_KEY }}
     steps:
@@ -26,7 +26,9 @@ jobs:
           egress-policy: block
           allowed-endpoints: >
             github.com:443
-            *.hex.pm:443
+            hex.pm:443
+            repo.hex.pm:443
+            builds.hex.pm:443
 
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - uses: erlef/setup-elixir@904c511e63061a8f501ae4b081ce2c0e9cfc70ab # v1.17.4
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9f8dce..871827c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,8 +16,8 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        otp: ['22.3', '23.3']
-        elixir: ['1.10', '1.11']
+        otp: ['23.3', '24.3']
+        elixir: ['1.12', '1.13']
     env:
       MIX_ENV: test
     steps:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd47b3c..cb77d63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 * Update all dependencies. See [PR #332](https://github.com/kommitters/stellar_sdk/pull/332).
 * Update scorecards allowed endpoints and Security Policy. See [PR #355](https://github.com/kommitters/stellar_sdk/pull/355).
 * Delete `config` from `mix.exs` file. See [PR #358](https://github.com/kommitters/stellar_sdk/pull/358).
+* Bump Elixir version to 1.12. See [PR #360](https://github.com/kommitters/stellar_sdk/pull/360).
 
 ## 0.20.0 (20.12.2023)
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d9cacba..caca96b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,7 +12,7 @@ We want to make it as easy as possible to contribute changes that help the [Stel
 * Fork the repository on GitHub.
 * Try to keep your local repository in a "rebased" state.
 * Set the project up.
-  * Install any Elixir version above 1.10.
+  * Install any Elixir version above 1.12.
   * Compile dependencies: `mix deps.get`.
   * Run tests: `mix test`.
 
diff --git a/README.md b/README.md
index f27354c..58127dd 100644
--- a/README.md
+++ b/README.md
@@ -1053,7 +1053,7 @@ See [**Stellar.Horizon.TradeAggregations**](https://developers.stellar.org/api/a
 ---
 
 ## Development
-* Install any Elixir version above 1.10.
+* Install any Elixir version above 1.12.
 * Compile dependencies: `mix deps.get`.
 * Run tests: `mix test`.
 
diff --git a/mix.exs b/mix.exs
index 3304e72..3bec3b7 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,7 +8,7 @@ defmodule Stellar.MixProject do
     [
       app: :stellar_sdk,
       version: @version,
-      elixir: "~> 1.10",
+      elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       name: "Elixir Stellar SDK",