diff --git a/.ruby-version b/.ruby-version
index 43e05f5..c1026d2 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-rbx-3.25
+ruby-2.3.1
diff --git a/.travis.yml b/.travis.yml
index bb4bb66..58807fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,2 +1,5 @@
 sudo: required
 language: ruby
+before_install:
+  - mktemp --version
+  - mktemp -d -t srcclr.XXX