diff --git a/common/gem.md b/common/gem.md
index 810938c10d..fbc3d8c7b7 100644
--- a/common/gem.md
+++ b/common/gem.md
@@ -8,7 +8,7 @@
 
 - Install specific version of a gem
 
-`gem install -v=0.0.15`
+`gem install -v={{0.0.15}}`
 
 - Update a gem