1 files changed, 3 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index 2704e1e806..1a1b1584e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -168,3 +168,6 @@ end
 gem "ibm_db" if ENV["IBM_DB"]
 gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 gem "wdm", ">= 0.1.0", platforms: [:mingw, :mswin, :x64_mingw, :mswin64]
+
+# Workaround not to install mail 2.7
+gem "mail", ">= 2.5.4", "< 2.7"