diff --git a/.travis.yml b/.travis.yml
index 9624d4483..2846a42fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,7 +24,7 @@ matrix:
     - os: osx
       env: NAME="macos build"
       sudo: false
-      osx_image: xcode7.3
+      osx_image: xcode9.2
       install: "./.travis/macos/deps.sh"
       script: "./.travis/macos/build.sh"
       after_success: "./.travis/macos/upload.sh"
diff --git a/externals/enet b/externals/enet
index a84c120ef..39a72ab19 160000
--- a/externals/enet
+++ b/externals/enet
@@ -1 +1 @@
-Subproject commit a84c120eff13d2fa3eadb41ef7afe0f7819f4d6c
+Subproject commit 39a72ab1990014eb399cee9d538fd529df99c6a0
diff --git a/externals/nihstro b/externals/nihstro
index 7e24743af..28ac07a52 160000
--- a/externals/nihstro
+++ b/externals/nihstro
@@ -1 +1 @@
-Subproject commit 7e24743af21a7c2e3cef21ef174ae4269d0cfdac
+Subproject commit 28ac07a5273b6250cfafb4630bee8da820ad33d7