diff --git a/.gitignore b/.gitignore
index 55606b1502..b4d6d0f792 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,6 @@ screenshots/
 
 # osx 
 .DS_Store
+
+# mix phx.gen.cert self-signed certs for dev
+/apps/block_scout_web/priv/cert
diff --git a/apps/block_scout_web/config/dev.exs b/apps/block_scout_web/config/dev.exs
index 2b50183667..8feafba7cb 100644
--- a/apps/block_scout_web/config/dev.exs
+++ b/apps/block_scout_web/config/dev.exs
@@ -8,6 +8,12 @@ use Mix.Config
 # with webpack to recompile .js and .css sources.
 config :block_scout_web, BlockScoutWeb.Endpoint,
   http: [port: 4000],
+  https: [
+    port: 4001,
+    cipher_suite: :strong,
+    certfile: "priv/cert/selfsigned.pem",
+    keyfile: "priv/cert/selfsigned_key.pem"
+  ],
   debug_errors: true,
   code_reloader: true,
   check_origin: false,
diff --git a/apps/block_scout_web/config/test.exs b/apps/block_scout_web/config/test.exs
index 72beec9ff4..1c695a15bc 100644
--- a/apps/block_scout_web/config/test.exs
+++ b/apps/block_scout_web/config/test.exs
@@ -5,7 +5,7 @@ config :block_scout_web, :sql_sandbox, true
 # We don't run a server during test. If one is required,
 # you can enable the server option below.
 config :block_scout_web, BlockScoutWeb.Endpoint,
-  http: [port: 4001],
+  http: [port: 4002],
   secret_key_base: "27Swe6KtEtmN37WyEYRjKWyxYULNtrxlkCEKur4qoV+Lwtk8lafsR16ifz1XBBYj",
   server: true