diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f7d2f074..835c0390 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ variables:
 build_project:
   stage: build
   script:
-    - "( brew install libsodium json-c autoconf automake )"
+    - "( brew bundle )"
     - "( ./lib/bin/build_libsodium-macos )"
     - "( cd ./platform-independent/c/cli && ./clean && targets=all ./build && ./mpw-tests && ./mpw-cli-tests )"
     - "( cd ./gradle && ./gradlew --info clean test )"
diff --git a/Brewfile b/Brewfile
new file mode 100644
index 00000000..cb16d9ba
--- /dev/null
+++ b/Brewfile
@@ -0,0 +1,5 @@
+brew "libsodium"
+brew "json-c"
+
+brew "automake"
+brew "autoconf"