diff --git a/.circleci/config.yml b/.circleci/config.yml
index 029e612a5..c4d3049a3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -39,6 +39,10 @@ jobs:
             curl -O https://cmake.org/files/v3.4/cmake-3.4.1-Darwin-x86_64.tar.gz
             tar xf cmake-3.4.1-Darwin-x86_64.tar.gz
             export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
+      - run:
+          name: Install libffi dependencies
+          command: |
+            brew install autoconf automake libtool
       - run:
           name: Install Rust
           command: |
@@ -116,6 +120,10 @@ jobs:
             curl -O https://cmake.org/files/v3.4/cmake-3.4.1-Darwin-x86_64.tar.gz
             tar xf cmake-3.4.1-Darwin-x86_64.tar.gz
             export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
+      - run:
+          name: Install libffi dependencies
+          command: |
+            brew install autoconf automake libtool
       - run:
           name: Install Rust
           command: |