diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e1fdec7..79e9ca7b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
 
 
   build_and_test_mac:
-    runs-on: macos-10.15
+    runs-on: macos-latest
     steps:
       - name: Checkout wren-console
         uses: actions/checkout@v2
diff --git a/src/cli/cli.c b/src/cli/cli.c
index 3a40b0e7..aea47fb2 100644
--- a/src/cli/cli.c
+++ b/src/cli/cli.c
@@ -1,3 +1,5 @@
+#include <string.h>
+
 #include "vm.h"
 #include "cli.h"