diff --git a/.circleci/config.yml b/.circleci/config.yml
index e6aa145..400f3de 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -26,11 +26,11 @@ defaults: &defaults
   working_directory: ~/repo
 
 jobs:
-  build_elixir_1_11_otp_23:
+  build_elixir_1_12_otp_24:
     docker:
-      - image: erlang:23.1
+      - image: erlang:24.0.3
         environment:
-          ELIXIR_VERSION: 1.11.0-otp-23
+          ELIXIR_VERSION: 1.12.2-otp-24
           LC_ALL: C.UTF-8
     <<: *defaults
     steps:
@@ -54,6 +54,21 @@ jobs:
             - _build
             - deps
 
+  build_elixir_1_11_otp_23:
+    docker:
+      - image: erlang:23.1
+        environment:
+          ELIXIR_VERSION: 1.11.4-otp-23
+          LC_ALL: C.UTF-8
+    <<: *defaults
+    steps:
+      - checkout
+      - <<: *install_system_deps
+      - <<: *install_elixir
+      - <<: *install_hex_rebar
+      - run: mix deps.get
+      - run: mix test --exclude requires_working_audio
+
   build_elixir_1_10_otp_23:
     docker:
       - image: erlang:23.1
@@ -73,5 +88,6 @@ workflows:
   version: 2
   build_test:
     jobs:
+      - build_elixir_1_12_otp_24
       - build_elixir_1_11_otp_23
       - build_elixir_1_10_otp_23