roll credentials (#35)

diff --git a/.travis.yml b/.travis.yml
index f9cda85..9c4e093 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,5 +45,5 @@
     repo: apache/openwhisk-runtime-rust
 env:
   global:
-  - secure: 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
-  - secure: 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
+    - secure: "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"
+    - secure: "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"