diff --git a/ci/geminstaller.yml b/ci/geminstaller.yml
index 33f1e811790..387e370a6fd 100644
--- a/ci/geminstaller.yml
+++ b/ci/geminstaller.yml
@@ -14,7 +14,7 @@ gems:
 - name: pg
   version: >= 0.7.9.2008.10.13
 - name: rack
-  version: '~> 0.9.0'
+  version: '~> 1.0.0'
 - name: rake
   version: >= 0.8.1
 - name: sqlite-ruby