diff --git a/travis/build-wheels.sh b/travis/build-wheels.sh
index febc04a1f08266ef8a802ba5a3a821952ffc1b45..a7a5a943d7252245b60e2d4af43ff20b155ac746 100755
--- a/travis/build-wheels.sh
+++ b/travis/build-wheels.sh
@@ -33,7 +33,7 @@ function stop_spinner {
 
 start_spinner
 
-yum install -y git yum
+yum install -y git yum openssl-devel
 curl -L -O http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.2.tar.gz
 tar -xf ruby-2.1.2.tar.gz
 cd ruby-2.1.2