diff --git a/mailcatcher/install.sh b/mailcatcher/install.sh
index 13876e5..34227fc 100644
--- a/mailcatcher/install.sh
+++ b/mailcatcher/install.sh
@@ -7,7 +7,7 @@ set -e
 apt-get update && apt-get install -y build-essential sqlite3 libsqlite3-dev
 
 # install mailcatcher
-gem install mailcatcher -v 0.5.12 --no-ri --no-rdoc
+gem install mailcatcher -v 0.6.4 --no-ri --no-rdoc
 
 # cleanup package manager
 apt-get remove --purge -y build-essential libsqlite3-dev && apt-get autoclean && apt-get clean