diff --git a/config/deploy.rb b/config/deploy.rb
index 68d7e83..9aa5b0c 100644
--- a/config/deploy.rb
+++ b/config/deploy.rb
@@ -50,3 +50,6 @@ append :linked_dirs,
 set :whenever_identifier, ->{ "#{fetch(:application)}_#{fetch(:stage)}" }
 
 set :migration_role, :app
+
+Net::SSH::Transport::Algorithms::ALGORITHMS.values.each { |algs| algs.reject! { |a| a =~ /^ecd(sa|h)-sha2/ } }
+Net::SSH::KnownHosts::SUPPORTED_TYPE.reject! { |t| t =~ /^ecd(sa|h)-sha2/ }
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