diff --git a/app/lib/utils/oidc_provider.rb b/app/lib/utils/oidc_provider.rb
index bdc5e28..83a74f4 100644
--- a/app/lib/utils/oidc_provider.rb
+++ b/app/lib/utils/oidc_provider.rb
@@ -35,7 +35,10 @@ def vault_client
     @vault_client ||=
       ::Vault::Client.new(
         address: Config[:oidc_provider_addr],
-        token: Config[:vault_token]
+        token: Config[:vault_token],
+        ssl_ca_cert: Config[:vault_ssl_cert],
+        ssl_pem_file: Config[:vault_ssl_client_cert],
+        ssl_key_file: Config[:vault_ssl_client_key]
       )
   end