diff --git a/.travis.yml b/.travis.yml
index c820627..4dad8dd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,4 +23,4 @@ deploy:
   on:
     tags: true
     condition: $REBAR_VSN = '3'
-    otp_release: 18.2
+    otp_release: '18.2'